CDK1

UniProt ID: P06493
Organism: Homo sapiens
Review Status: COMPLETE
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Gene Description

Cyclin-dependent kinase 1 (CDK1, also known as CDC2/p34cdc2) is the essential and universally conserved serine/threonine kinase that drives the G2/M transition and mitotic progression in all eukaryotes. CDK1 is unique among CDKs in being absolutely required for cell division in mammals. The active holoenzyme consists of CDK1 bound to cyclin B1 (principally) or cyclin A, with CKS1/2 serving as phospho-adaptors that promote multisite substrate phosphorylation. CDK1 activity is tightly regulated through activating phosphorylation at Thr161 by CAK (CDK7-cyclin H) and inhibitory phosphorylation at Thr14 and Tyr15 by WEE1 and PKMYT1, which is reversed by CDC25 phosphatases at mitotic entry. CDK1 phosphorylates substrates on S/T-P motifs and has over 1000 documented substrates, including lamins (nuclear envelope breakdown), condensins (chromosome condensation), and numerous mitotic machinery proteins. As a master regulator of cell division, CDK1 has been documented to phosphorylate many proteins involved in diverse processes beyond mitosis (transcription, metabolism, organelle dynamics), but its core evolved function is as the essential mitotic kinase

Existing Annotations Review

GO Term Evidence Action Reason
GO:0005634 nucleus
IBA
GO_REF:0000033
ACCEPT
Summary: CDK1 localizes to the nucleus during G2 and at mitotic entry. CDK1-cyclin B complexes shuttle between cytoplasm and nucleus, with activation detected at centrosomes and then across nuclear compartments at nuclear envelope breakdown.
Reason: Nuclear localization is well-established and essential for CDK1 function in regulating nuclear substrates including lamins. The IBA annotation is phylogenetically supported across diverse eukaryotes.
Supporting Evidence:
file:human/CDK1/CDK1-deep-research-falcon.md
model: Edison Scientific Literature
GO:0000086 G2/M transition of mitotic cell cycle
IBA
GO_REF:0000033
ACCEPT
Summary: CDK1 is THE essential kinase for G2/M transition - the defining core function of this protein. CDK1 drives the bistable switch into mitosis through phosphorylation of numerous mitotic substrates.
Reason: This is the canonical, essential function of CDK1. CDK1 is uniquely essential among CDKs for mammalian cell cycle progression and specifically drives G2/M transition. The IBA annotation reflects deeply conserved function across all eukaryotes.
GO:0000307 cyclin-dependent protein kinase holoenzyme complex
IBA
GO_REF:0000033
ACCEPT
Summary: CDK1 functions as part of a holoenzyme complex with cyclin partners (principally cyclin B1, also cyclin A) and CKS subunits (CKS1/2) that act as phospho-adaptors.
Reason: CDK1 requires cyclin binding for activity - this is fundamental to its function. The holoenzyme complex is the active form of the kinase.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IBA
GO_REF:0000033
ACCEPT
Summary: CDK1 is a prototypical cyclin-dependent kinase with serine/threonine kinase activity (EC 2.7.11.22/23). It requires cyclin binding for catalytic activity and phosphorylates S/T-P motifs.
Reason: This is the core molecular function of CDK1. The enzyme activity is well-characterized biochemically with defined substrate specificity for S/T-P motifs.
GO:0007095 mitotic G2 DNA damage checkpoint signaling
IBA
GO_REF:0000033
ACCEPT
Summary: CDK1 activity is the target of the G2 DNA damage checkpoint. The checkpoint operates through inhibition of CDC25 phosphatases and activation of WEE1/PKMYT1, which maintain CDK1 in an inactive, phosphorylated state.
Reason: CDK1 is central to G2 checkpoint signaling as its activity is the regulated output of the checkpoint pathway. DNA damage prevents CDC25-mediated activation of CDK1.
GO:0006338 chromatin remodeling
IEA
GO_REF:0000108
KEEP AS NON CORE
Summary: CDK1 phosphorylates chromatin-associated proteins during mitosis as part of chromosome condensation. However, CDK1 is not a dedicated chromatin remodeler - this is a downstream consequence of its mitotic role.
Reason: While CDK1 does phosphorylate chromatin-associated substrates, this is part of its broader role in mitotic progression rather than a core chromatin remodeling function.
GO:0006357 regulation of transcription by RNA polymerase II
IEA
GO_REF:0000108
KEEP AS NON CORE
Summary: CDK1 can phosphorylate the RNA Pol II CTD, but this is not its core function. CDK1's transcriptional regulation role is largely through mitotic transcriptional shutdown.
Reason: CDK1 phosphorylation of RNA Pol II CTD and transcriptional regulators occurs but is peripheral to its core cell cycle function.
GO:0046718 symbiont entry into host cell
IEA
GO_REF:0000108
MARK AS OVER ANNOTATED
Summary: This appears to be derived from CDK1 role in viral infection processes. CDK1 may be exploited by viruses but this is not an evolved function.
Reason: Viral exploitation of host cell cycle machinery does not represent an evolved function of CDK1. This annotation conflates pathogen hijacking with host protein function.
GO:0000166 nucleotide binding
IEA
GO_REF:0000043
ACCEPT
Summary: CDK1 binds ATP as a substrate for its kinase activity. This is a generic annotation that follows from having kinase activity.
Reason: While true, this is a very general annotation implied by the kinase activity. The more specific ATP binding term is more informative.
GO:0001618 virus receptor activity
IEA
GO_REF:0000043
REMOVE
Summary: This annotation appears to be based on UniProt keywords. CDK1 is not a virus receptor in the canonical sense - viruses may exploit CDK1 function but it is not a cell surface receptor for viral entry.
Reason: CDK1 is an intracellular kinase, not a virus receptor. This annotation is misleading and likely results from misinterpretation of CDK1's role in viral replication cycles.
GO:0004672 protein kinase activity
IEA
GO_REF:0000002
ACCEPT
Summary: CDK1 has protein kinase activity. This is a parent term of the more specific cyclin-dependent protein serine/threonine kinase activity.
Reason: True but generic. The more specific cyclin-dependent protein kinase activity terms are more informative.
GO:0004674 protein serine/threonine kinase activity
IEA
GO_REF:0000120
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IEA
GO_REF:0000120
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
GO:0005524 ATP binding
IEA
GO_REF:0000120
ACCEPT
Summary: CDK1 binds ATP as a phosphate donor for its kinase activity. The ATP binding pocket is well-characterized structurally.
Reason: ATP binding is essential for CDK1 kinase activity. Structural data confirms the ATP binding site.
GO:0005634 nucleus
IEA
GO_REF:0000044
ACCEPT
Summary: CDK1 localizes to the nucleus at G2 and during nuclear envelope breakdown.
Reason: Nuclear localization is well-established for CDK1-cyclin B complexes.
GO:0005737 cytoplasm
IEA
GO_REF:0000044
ACCEPT
Summary: CDK1-cyclin complexes are present in the cytoplasm and shuttle between cytoplasm and nucleus.
Reason: Cytoplasmic localization is well-documented, particularly for CDK1-cyclin B complexes which are retained in cytoplasm until mitotic entry.
GO:0005739 mitochondrion
IEA
GO_REF:0000044
ACCEPT
Summary: CDK1-cyclin B1 localizes to mitochondria and phosphorylates mitochondrial substrates including Complex I subunits to boost ATP synthesis at G2/M.
Reason: Mitochondrial localization of CDK1-cyclin B1 has been documented with functional roles in regulating mitochondrial respiration at cell cycle transitions.
GO:0005813 centrosome
IEA
GO_REF:0000044
ACCEPT
Summary: CDK1 localizes to centrosomes where it is first activated at mitotic entry and regulates centrosome maturation and separation.
Reason: Centrosomal localization is well-established and functionally important for CDK1 activation and mitotic spindle organization.
GO:0005819 spindle
IEA
GO_REF:0000044
ACCEPT
Summary: CDK1 localizes to the mitotic spindle where it phosphorylates spindle-associated substrates to regulate spindle assembly and function.
Reason: Spindle localization is well-documented and functional for mitotic regulation.
GO:0006915 apoptotic process
IEA
GO_REF:0000043
MARK AS OVER ANNOTATED
Summary: CDK1 phosphorylates apoptosis-related proteins including survivin (Thr34), caspase-9, and Bcl-2 family members as part of its extensive substratome. However, apoptosis is NOT a core function of CDK1. CDK1 phosphorylates survivin to maintain its anti-apoptotic activity during mitosis, preventing inappropriate cell death during cell division. This represents phosphorylation of apoptotic regulators during normal cell cycle, not an evolved apoptotic function.
Reason: This is the quintessential OVER-ANNOTATION. CDK1's core function is cell cycle control. The fact that CDK1 phosphorylates survivin and other apoptosis-related proteins among its 1000+ substrates does not make apoptosis its function. This is analogous to annotating a transcription factor to all processes involving its target genes. The 2023 Massacci review explicitly notes CDK1's apoptosis-related substrates as part of the expanded CDK1 substratome but this represents downstream effects of cell cycle kinase activity, not an evolved apoptotic function.
GO:0008353 RNA polymerase II CTD heptapeptide repeat kinase activity
IEA
GO_REF:0000120
ACCEPT
Summary: CDK1 can phosphorylate the RNA Pol II CTD. This activity has been demonstrated biochemically.
Reason: This is a documented enzymatic activity of CDK1, though not its primary function.
GO:0016301 kinase activity
IEA
GO_REF:0000120
ACCEPT
Summary: CDK1 is a kinase. This is a very general parent term.
Reason: True but generic. More specific kinase activity terms are more informative.
GO:0016740 transferase activity
IEA
GO_REF:0000043
ACCEPT
Summary: CDK1 has transferase activity (transfers phosphate groups). Very generic term.
Reason: True but very generic. Implied by kinase activity.
GO:0048511 rhythmic process
IEA
GO_REF:0000043
KEEP AS NON CORE
Summary: CDK1 activity cycles with the cell cycle, which is a rhythmic process. CDK1 also has connections to circadian rhythm.
Reason: The cell cycle is rhythmic, and CDK1 has been implicated in circadian regulation, but rhythmic process is not the core function.
GO:0051301 cell division
IEA
GO_REF:0000043
ACCEPT
Summary: CDK1 is essential for cell division. This is its core biological process.
Reason: Cell division is the core function of CDK1. It is the only CDK essential for mammalian cell division.
GO:0106310 protein serine kinase activity
IEA
GO_REF:0000116
ACCEPT
Summary: CDK1 phosphorylates serine residues. More specifically it has cyclin-dependent protein serine/threonine kinase activity.
Reason: True, CDK1 phosphorylates serine residues in S-P motifs.
GO:0005515 protein binding
IPI
PMID:10373560
Overproduction of human Myt1 kinase induces a G2 cell cycle ...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:10373560
Overproduction of human Myt1 kinase induces a G2 cell cycle delay by interfering with the intracellular trafficking of Cdc2-cyclin B1 complexes.
GO:0005515 protein binding
IPI
PMID:12612082
A novel RING finger protein, human enhancer of invasion 10, ...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:12612082
A novel RING finger protein, human enhancer of invasion 10, alters mitotic progression through regulation of cyclin B levels.
GO:0005515 protein binding
IPI
PMID:15657067
Phosphotyrosine signaling networks in epidermal growth facto...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:15657067
Epub 2005 Jan 17. Phosphotyrosine signaling networks in epidermal growth factor receptor overexpressing squamous carcinoma cells.
GO:0005515 protein binding
IPI
PMID:17283331
Death-effector domain-containing protein DEDD is an inhibito...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:17283331
Death-effector domain-containing protein DEDD is an inhibitor of mitotic Cdk1/cyclin B1.
GO:0005515 protein binding
IPI
PMID:17349584
Fez1/Lzts1 absence impairs Cdk1/Cdc25C interaction during mi...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:17349584
Fez1/Lzts1 absence impairs Cdk1/Cdc25C interaction during mitosis and predisposes mice to cancer development.
GO:0005515 protein binding
IPI
PMID:17681274
Cell death in leukemia: passenger protein regulation by topo...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:17681274
Cell death in leukemia: passenger protein regulation by topoisomerase inhibitors.
GO:0005515 protein binding
IPI
PMID:18337751
cdc2-cyclin B regulates eEF2 kinase activity in a cell cycle...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:18337751
cdc2-cyclin B regulates eEF2 kinase activity in a cell cycle- and amino acid-dependent manner.
GO:0005515 protein binding
IPI
PMID:18408765
CDK1 promotes cell proliferation and survival via phosphoryl...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:18408765
CDK1 promotes cell proliferation and survival via phosphorylation and inhibition of FOXO1 transcription factor.
GO:0005515 protein binding
IPI
PMID:19879842
Regulation of MBK-2/DYRK by CDK-1 and the pseudophosphatases...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:19879842
Regulation of MBK-2/DYRK by CDK-1 and the pseudophosphatases EGG-4 and EGG-5 during the oocyte-to-embryo transition.
GO:0005515 protein binding
IPI
PMID:20395957
New Cdc2 Tyr 4 phosphorylation by dsRNA-activated protein ki...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:20395957
New Cdc2 Tyr 4 phosphorylation by dsRNA-activated protein kinase triggers Cdc2 polyubiquitination and G2 arrest under genotoxic stresses.
GO:0005515 protein binding
IPI
PMID:21041660
Cell division cycle 6, a mitotic substrate of polo-like kina...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:21041660
Cell division cycle 6, a mitotic substrate of polo-like kinase 1, regulates chromosomal segregation mediated by cyclin-dependent kinase 1 and separase.
GO:0005515 protein binding
IPI
PMID:23543736
Ubiquitin C-terminal hydrolase L1 (UCH-L1) acts as a novel p...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:23543736
2013 Mar 29. Ubiquitin C-terminal hydrolase L1 (UCH-L1) acts as a novel potentiator of cyclin-dependent kinases to enhance cell proliferation independently of its hydrolase activity.
GO:0005515 protein binding
IPI
PMID:23602568
The protein interaction landscape of the human CMGC kinase g...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:23602568
2013 Apr 18. The protein interaction landscape of the human CMGC kinase group.
GO:0005515 protein binding
IPI
PMID:23799914
Sulforaphane induced cell cycle arrest in the G2/M phase via...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:23799914
Sulforaphane induced cell cycle arrest in the G2/M phase via the blockade of cyclin B1/CDC2 in human ovarian cancer cells.
GO:0005515 protein binding
IPI
PMID:24218572
CDK10/cyclin M is a protein kinase that controls ETS2 degrad...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:24218572
CDK10/cyclin M is a protein kinase that controls ETS2 degradation and is deficient in STAR syndrome.
GO:0005515 protein binding
IPI
PMID:24358021
Polycomb protein SCML2 regulates the cell cycle by binding a...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:24358021
2013 Dec 17. Polycomb protein SCML2 regulates the cell cycle by binding and modulating CDK/CYCLIN/p21 complexes.
GO:0005515 protein binding
IPI
PMID:24658140
The mammalian-membrane two-hybrid assay (MaMTH) for probing ...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:24658140
The mammalian-membrane two-hybrid assay (MaMTH) for probing membrane-protein interactions in human cells.
GO:0005515 protein binding
IPI
PMID:25218637
RASSF1A-LATS1 signalling stabilizes replication forks by res...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:25218637
Sep 14. RASSF1A-LATS1 signalling stabilizes replication forks by restricting CDK2-mediated phosphorylation of BRCA2.
GO:0005515 protein binding
IPI
PMID:25416956
A proteome-scale map of the human interactome network.
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:25416956
A proteome-scale map of the human interactome network.
GO:0005515 protein binding
IPI
PMID:25852190
Integrative analysis of kinase networks in TRAIL-induced apo...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:25852190
Integrative analysis of kinase networks in TRAIL-induced apoptosis provides a source of potential targets for combination therapy.
GO:0005515 protein binding
IPI
PMID:26496610
A human interactome in three quantitative dimensions organiz...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:26496610
Oct 22. A human interactome in three quantitative dimensions organized by stoichiometries and abundances.
GO:0005515 protein binding
IPI
PMID:27626412
Sulforaphane, a Dietary Isothiocyanate, Induces Gβ‚‚/M Arrest ...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:27626412
Sulforaphane, a Dietary Isothiocyanate, Induces Gβ‚‚/M Arrest in Cervical Cancer Cells through CyclinB1 Downregulation and GADD45Ξ²/CDC2 Association.
GO:0005515 protein binding
IPI
PMID:27880917
Phenotypic and Interaction Profiling of the Human Phosphatas...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:27880917
Phenotypic and Interaction Profiling of the Human Phosphatases Identifies Diverse Mitotic Regulators.
GO:0005515 protein binding
IPI
PMID:28514442
Architecture of the human interactome defines protein commun...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:28514442
Architecture of the human interactome defines protein communities and disease networks.
GO:0005515 protein binding
IPI
PMID:29128334
A Map of Human Mitochondrial Protein Interactions Linked to ...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:29128334
2017 Nov 8. A Map of Human Mitochondrial Protein Interactions Linked to Neurodegeneration Reveals New Mechanisms of Redox Homeostasis and NF-ΞΊB Signaling.
GO:0005515 protein binding
IPI
PMID:30833792
A protein-interaction network of interferon-stimulated genes...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:30833792
Mar 4. A protein-interaction network of interferon-stimulated genes extends the innate immune system landscape.
GO:0005515 protein binding
IPI
PMID:31980649
Extensive rewiring of the EGFR network in colorectal cancer ...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:31980649
Extensive rewiring of the EGFR network in colorectal cancer cells expressing transforming levels of KRAS(G13D).
GO:0005515 protein binding
IPI
PMID:32707033
Kinase Interaction Network Expands Functional and Disease Ro...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:32707033
2020 Jul 23. Kinase Interaction Network Expands Functional and Disease Roles of Human Kinases.
GO:0005515 protein binding
IPI
PMID:32814053
Interactome Mapping Provides a Network of Neurodegenerative ...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:32814053
Interactome Mapping Provides a Network of Neurodegenerative Disease Proteins and Uncovers Widespread Protein Aggregation in Affected Brains.
GO:0005515 protein binding
IPI
PMID:33037310
The sequence at Spike S1/S2 site enables cleavage by furin a...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:33037310
The sequence at Spike S1/S2 site enables cleavage by furin and phospho-regulation in SARS-CoV2 but not in SARS-CoV1 or MERS-CoV.
GO:0005515 protein binding
IPI
PMID:33961781
Dual proteome-scale networks reveal cell-specific remodeling...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:33961781
2021 May 6. Dual proteome-scale networks reveal cell-specific remodeling of the human interactome.
GO:0005515 protein binding
IPI
PMID:34591612
A protein interaction landscape of breast cancer.
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:34591612
Oct 1. A protein interaction landscape of breast cancer.
GO:0005515 protein binding
IPI
PMID:35271311
OpenCell: Endogenous tagging for the cartography of human ce...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:35271311
2022 Mar 11. OpenCell: Endogenous tagging for the cartography of human cellular organization.
GO:0005515 protein binding
IPI
PMID:7815540
Simian virus 40 large T antigen affects the Saccharomyces ce...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:7815540
Simian virus 40 large T antigen affects the Saccharomyces cerevisiae cell cycle and interacts with p34CDC28.
GO:0005515 protein binding
IPI
PMID:9001210
The human Myt1 kinase preferentially phosphorylates Cdc2 on ...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:9001210
The human Myt1 kinase preferentially phosphorylates Cdc2 on threonine 14 and localizes to the endoplasmic reticulum and Golgi complex.
GO:0005515 protein binding
IPI
PMID:9988268
Human homologue of the Drosophila melanogaster lats tumour s...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:9988268
Human homologue of the Drosophila melanogaster lats tumour suppressor modulates CDC2 activity.
GO:0003682 chromatin binding
IEA
GO_REF:0000107
ACCEPT
Summary: CDK1 binds to chromatin during mitosis. This is consistent with its role in chromosome condensation and nuclear envelope breakdown.
Reason: Chromatin binding is documented and functionally relevant for CDK1's mitotic role.
GO:0005759 mitochondrial matrix
IEA
GO_REF:0000107
ACCEPT
Summary: CDK1-cyclin B1 localization to mitochondrial matrix has been documented with roles in regulating ATP synthesis at G2/M.
Reason: Mitochondrial matrix localization has experimental support.
GO:0005829 cytosol
IEA
GO_REF:0000107
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0009636 response to toxic substance
IEA
GO_REF:0000107
MARK AS OVER ANNOTATED
Summary: CDK1 expression/activity may change in response to toxic substances, but this is not a core function.
Reason: Responding to toxic substances is not a core evolved function of CDK1. This likely reflects cell cycle perturbation under stress conditions.
GO:0010628 positive regulation of gene expression
IEA
GO_REF:0000107
KEEP AS NON CORE
Summary: CDK1 can regulate gene expression through phosphorylation of transcription factors and RNA Pol II CTD.
Reason: While CDK1 affects gene expression, this is not its core function.
GO:0014075 response to amine
IEA
GO_REF:0000107
MARK AS OVER ANNOTATED
Summary: CDK1 involvement in response to amine is not a core function.
Reason: This is likely a downstream or indirect effect, not a core evolved function.
GO:0014823 response to activity
IEA
GO_REF:0000107
MARK AS OVER ANNOTATED
Summary: Not a core function of CDK1.
Reason: This is not a core evolved function of CDK1.
GO:0030261 chromosome condensation
IEA
GO_REF:0000107
ACCEPT
Summary: CDK1 phosphorylates condensin subunits to promote chromosome condensation during mitosis. This is part of its core mitotic function.
Reason: Chromosome condensation is a direct consequence of CDK1 activity on mitotic substrates including condensins.
GO:0030544 Hsp70 protein binding
IEA
GO_REF:0000107
KEEP AS NON CORE
Summary: CDK1 may bind Hsp70 chaperones but this is not a core function.
Reason: Chaperone interactions are common for kinases but not a primary function.
GO:0035173 histone kinase activity
IEA
GO_REF:0000107
ACCEPT
Summary: CDK1 phosphorylates histones including H1 and H3. This is part of mitotic chromatin regulation.
Reason: Histone phosphorylation by CDK1 is documented and functionally relevant for mitotic chromatin dynamics.
GO:0042307 positive regulation of protein import into nucleus
IEA
GO_REF:0000107
KEEP AS NON CORE
Summary: CDK1 phosphorylates substrates that affect nuclear import, but this is not a core function.
Reason: Nuclear transport effects are downstream of CDK1's mitotic activity.
GO:0042542 response to hydrogen peroxide
IEA
GO_REF:0000107
MARK AS OVER ANNOTATED
Summary: CDK1 involvement in oxidative stress response is not a core function.
Reason: This is not a core evolved function of CDK1.
GO:0045471 response to ethanol
IEA
GO_REF:0000107
MARK AS OVER ANNOTATED
Summary: CDK1 involvement in ethanol response is not a core function.
Reason: This is not a core evolved function of CDK1.
GO:0045740 positive regulation of DNA replication
IEA
GO_REF:0000107
KEEP AS NON CORE
Summary: CDK1 regulates replication origin licensing and S-phase entry, though CDK2 is more traditionally associated with S-phase.
Reason: DNA replication regulation is a secondary function; CDK1's primary role is G2/M transition.
GO:0046686 response to cadmium ion
IEA
GO_REF:0000107
MARK AS OVER ANNOTATED
Summary: CDK1 involvement in cadmium response is not a core function.
Reason: This is not a core evolved function of CDK1.
GO:0046688 response to copper ion
IEA
GO_REF:0000107
MARK AS OVER ANNOTATED
Summary: CDK1 involvement in copper response is not a core function.
Reason: This is not a core evolved function of CDK1.
GO:0048678 response to axon injury
IEA
GO_REF:0000107
MARK AS OVER ANNOTATED
Summary: CDK1 involvement in axon injury response is not a core function.
Reason: This is not a core evolved function of CDK1.
GO:0055015 ventricular cardiac muscle cell development
IEA
GO_REF:0000107
MARK AS OVER ANNOTATED
Summary: CDK1 is required for cell division during cardiac development, but cardiac muscle cell development per se is not a core function.
Reason: CDK1 is required for cell division in all tissues including heart, but cardiac development is not its core function.
GO:0060045 positive regulation of cardiac muscle cell proliferation
IEA
GO_REF:0000107
MARK AS OVER ANNOTATED
Summary: CDK1 drives cell division, including in cardiac muscle cells. However, this is not cardiac-specific function.
Reason: CDK1 drives cell division universally; annotating to specific tissue types represents over-annotation.
GO:0065003 protein-containing complex assembly
IEA
GO_REF:0000107
KEEP AS NON CORE
Summary: CDK1 forms complexes with cyclins and CKS subunits, and phosphorylation of substrates can affect complex assembly.
Reason: CDK1 is part of complexes but general complex assembly is not its core function.
GO:0070301 cellular response to hydrogen peroxide
IEA
GO_REF:0000107
MARK AS OVER ANNOTATED
Summary: CDK1 involvement in oxidative stress response is not a core function.
Reason: This is not a core evolved function of CDK1.
GO:0090166 Golgi disassembly
IEA
GO_REF:0000107
ACCEPT
Summary: CDK1 phosphorylates GRASP65/GM130 and other Golgi proteins to promote Golgi fragmentation during mitosis.
Reason: Golgi disassembly is a documented mitotic function mediated by CDK1 phosphorylation of Golgi structural proteins.
GO:0097472 cyclin-dependent protein kinase activity
IEA
GO_REF:0000107
ACCEPT
Summary: CDK1 has cyclin-dependent protein kinase activity. This is its core molecular function.
Reason: This is the core molecular function of CDK1.
GO:0004674 protein serine/threonine kinase activity
IDA
PMID:31279575
Phosphorylation of Ci/Gli by Fused Family Kinases Promotes H...
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
Supporting Evidence:
PMID:31279575
2019 Jul 3. Phosphorylation of Ci/Gli by Fused Family Kinases Promotes Hedgehog Signaling.
GO:0045880 positive regulation of smoothened signaling pathway
IDA
PMID:31279575
Phosphorylation of Ci/Gli by Fused Family Kinases Promotes H...
KEEP AS NON CORE
Summary: CDK1 phosphorylation of Ci/Gli promotes Hedgehog signaling. This is a documented substrate effect but not a core function.
Reason: While CDK1 can phosphorylate Hedgehog pathway components, this is not its core evolved function.
Supporting Evidence:
PMID:31279575
2019 Jul 3. Phosphorylation of Ci/Gli by Fused Family Kinases Promotes Hedgehog Signaling.
GO:0005654 nucleoplasm
IDA
GO_REF:0000052
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005829 cytosol
IDA
GO_REF:0000052
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0000086 G2/M transition of mitotic cell cycle
TAS
Reactome:R-HSA-69275
ACCEPT
Summary: G2/M transition is THE core function of CDK1. It is uniquely required among all CDKs for mammalian cell division.
Reason: This is the canonical, essential function of CDK1.
GO:0016579 protein deubiquitination
TAS
Reactome:R-HSA-5688426
MARK AS OVER ANNOTATED
Summary: CDK1 is not a deubiquitinase. This annotation likely reflects CDK1's role in a pathway involving deubiquitination, not direct activity.
Reason: CDK1 does not catalyze deubiquitination. This is an example of pathway annotation being misattributed to a participant.
GO:0070371 ERK1 and ERK2 cascade
TAS
Reactome:R-HSA-110056
KEEP AS NON CORE
Summary: CDK1 can phosphorylate MAP2K1 (MEK1) contributing to ERK cascade regulation, but this is not its core function.
Reason: While CDK1 can affect ERK signaling, this is not its primary evolved function.
GO:0004674 protein serine/threonine kinase activity
TAS
Reactome:R-HSA-112342
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
GO:0004674 protein serine/threonine kinase activity
TAS
Reactome:R-HSA-8940100
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
TAS
Reactome:R-HSA-4088024
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
TAS
Reactome:R-HSA-5692755
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
TAS
Reactome:R-HSA-9929514
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
TAS
Reactome:R-HSA-9929532
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
TAS
Reactome:R-HSA-9929535
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
TAS
Reactome:R-HSA-9929717
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
TAS
Reactome:R-HSA-9929719
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
TAS
Reactome:R-HSA-9929720
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
TAS
Reactome:R-HSA-9929721
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
TAS
Reactome:R-HSA-9929884
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
TAS
Reactome:R-HSA-9929904
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
TAS
Reactome:R-HSA-9929935
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
GO:0000086 G2/M transition of mitotic cell cycle
NAS
PMID:17495531
Cyclin B and cyclin A confer different substrate recognition...
ACCEPT
Summary: G2/M transition is THE core function of CDK1. It is uniquely required among all CDKs for mammalian cell division.
Reason: This is the canonical, essential function of CDK1.
Supporting Evidence:
PMID:17495531
Cyclin B and cyclin A confer different substrate recognition properties on CDK2.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IDA
PMID:22411829
M phase phosphorylation of the epigenetic regulator UHRF1 re...
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
Supporting Evidence:
PMID:22411829
M phase phosphorylation of the epigenetic regulator UHRF1 regulates its physical association with the deubiquitylase USP7 and stability.
GO:2000060 positive regulation of ubiquitin-dependent protein catabolic process
IDA
PMID:22411829
M phase phosphorylation of the epigenetic regulator UHRF1 re...
KEEP AS NON CORE
Summary: CDK1 phosphorylation of substrates can regulate their stability via ubiquitination.
Reason: While CDK1 phosphorylation can affect substrate ubiquitination and degradation, this is not its core evolved function.
Supporting Evidence:
PMID:22411829
M phase phosphorylation of the epigenetic regulator UHRF1 regulates its physical association with the deubiquitylase USP7 and stability.
GO:0004674 protein serine/threonine kinase activity
IDA
PMID:23509069
MISP is a novel Plk1 substrate required for proper spindle o...
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
Supporting Evidence:
PMID:23509069
MISP is a novel Plk1 substrate required for proper spindle orientation and mitotic progression.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IDA
PMID:40440427
ASB7 is a negative regulator of H3K9me3 homeostasis.
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
Supporting Evidence:
PMID:40440427
2025 May 29. ASB7 is a negative regulator of H3K9me3 homeostasis.
GO:0031397 negative regulation of protein ubiquitination
IDA
PMID:40440427
ASB7 is a negative regulator of H3K9me3 homeostasis.
KEEP AS NON CORE
Summary: CDK1 phosphorylation can inhibit ubiquitination of some substrates.
Reason: Effects on substrate ubiquitination are downstream of kinase activity.
Supporting Evidence:
PMID:40440427
2025 May 29. ASB7 is a negative regulator of H3K9me3 homeostasis.
GO:0120261 regulation of heterochromatin organization
IDA
PMID:40440427
ASB7 is a negative regulator of H3K9me3 homeostasis.
KEEP AS NON CORE
Summary: CDK1 affects heterochromatin organization through substrate phosphorylation.
Reason: Chromatin effects are downstream of CDK1's mitotic role.
Supporting Evidence:
PMID:40440427
2025 May 29. ASB7 is a negative regulator of H3K9me3 homeostasis.
GO:0000082 G1/S transition of mitotic cell cycle
NAS
PMID:1312467
Cyclin A is required at two points in the human cell cycle.
KEEP AS NON CORE
Summary: CDK1 can participate in G1/S with cyclin A, though CDK2 is traditionally considered the main G1/S kinase.
Reason: CDK1 can compensate for CDK2 at G1/S, but G2/M is its primary function.
Supporting Evidence:
PMID:1312467
Cyclin A is required at two points in the human cell cycle.
GO:0000086 G2/M transition of mitotic cell cycle
NAS
PMID:1312467
Cyclin A is required at two points in the human cell cycle.
ACCEPT
Summary: G2/M transition is THE core function of CDK1. It is uniquely required among all CDKs for mammalian cell division.
Reason: This is the canonical, essential function of CDK1.
Supporting Evidence:
PMID:1312467
Cyclin A is required at two points in the human cell cycle.
GO:0000082 G1/S transition of mitotic cell cycle
IDA
PMID:11687586
RGC-32 increases p34CDC2 kinase activity and entry of aortic...
KEEP AS NON CORE
Summary: CDK1 can participate in G1/S with cyclin A, though CDK2 is traditionally considered the main G1/S kinase.
Reason: CDK1 can compensate for CDK2 at G1/S, but G2/M is its primary function.
Supporting Evidence:
PMID:11687586
Oct 30. RGC-32 increases p34CDC2 kinase activity and entry of aortic smooth muscle cells into S-phase.
GO:0004674 protein serine/threonine kinase activity
IDA
PMID:25012651
Ki67 antigen contributes to the timely accumulation of prote...
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
Supporting Evidence:
PMID:25012651
Epub 2014 Jul 10. Ki67 antigen contributes to the timely accumulation of protein phosphatase 1Ξ³ on anaphase chromosomes.
GO:0004674 protein serine/threonine kinase activity
IDA
PMID:32491969
Multisite phosphorylation determines the formation of Ska-Nd...
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
Supporting Evidence:
PMID:32491969
2020 Jun 3. Multisite phosphorylation determines the formation of Ska-Ndc80 macro-complexes that are essential for chromosome segregation during mitosis.
GO:0004674 protein serine/threonine kinase activity
IDA
PMID:31804178
Molecular determinants of the Ska-Ndc80 interaction and thei...
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
Supporting Evidence:
PMID:31804178
Molecular determinants of the Ska-Ndc80 interaction and their influence on microtubule tracking and force-coupling.
GO:0004674 protein serine/threonine kinase activity
IDA
PMID:28479321
Ska3 Phosphorylated by Cdk1 Binds Ndc80 and Recruits Ska to ...
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
Supporting Evidence:
PMID:28479321
Epub 2017 May 4. Ska3 Phosphorylated by Cdk1 Binds Ndc80 and Recruits Ska to Kinetochores to Promote Mitotic Progression.
GO:0034501 protein localization to kinetochore
IMP
PMID:28479321
Ska3 Phosphorylated by Cdk1 Binds Ndc80 and Recruits Ska to ...
ACCEPT
Summary: CDK1 phosphorylation promotes localization of proteins to kinetochores.
Reason: Kinetochore function is part of CDK1's core mitotic role.
Supporting Evidence:
PMID:28479321
Epub 2017 May 4. Ska3 Phosphorylated by Cdk1 Binds Ndc80 and Recruits Ska to Kinetochores to Promote Mitotic Progression.
GO:1902423 regulation of attachment of mitotic spindle microtubules to kinetochore
IDA
PMID:28479321
Ska3 Phosphorylated by Cdk1 Binds Ndc80 and Recruits Ska to ...
ACCEPT
Summary: CDK1 regulates kinetochore-microtubule attachment through Ska phosphorylation.
Reason: This is part of CDK1's core mitotic function.
Supporting Evidence:
PMID:28479321
Epub 2017 May 4. Ska3 Phosphorylated by Cdk1 Binds Ndc80 and Recruits Ska to Kinetochores to Promote Mitotic Progression.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IDA
PMID:19202191
Human CtIP mediates cell cycle control of DNA end resection ...
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
Supporting Evidence:
PMID:19202191
2009 Feb 7. Human CtIP mediates cell cycle control of DNA end resection and double strand break repair.
GO:0006974 DNA damage response
IDA
PMID:19202191
Human CtIP mediates cell cycle control of DNA end resection ...
KEEP AS NON CORE
Summary: CDK1 phosphorylates CtIP to control DNA end resection, linking cell cycle to DNA repair. This is a documented function though secondary to mitotic control.
Reason: DNA damage response is linked to CDK1 through CtIP phosphorylation, but the primary function remains cell cycle control.
Supporting Evidence:
PMID:19202191
2009 Feb 7. Human CtIP mediates cell cycle control of DNA end resection and double strand break repair.
GO:0000086 G2/M transition of mitotic cell cycle
IDA
PMID:30139873
An intrinsic S/G(2) checkpoint enforced by ATR.
ACCEPT
Summary: G2/M transition is THE core function of CDK1. It is uniquely required among all CDKs for mammalian cell division.
Reason: This is the canonical, essential function of CDK1.
Supporting Evidence:
PMID:30139873
An intrinsic S/G(2) checkpoint enforced by ATR.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IDA
PMID:30139873
An intrinsic S/G(2) checkpoint enforced by ATR.
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
Supporting Evidence:
PMID:30139873
An intrinsic S/G(2) checkpoint enforced by ATR.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IDA
PMID:37788673
ATR promotes clearance of damaged DNA and damaged cells by r...
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
Supporting Evidence:
PMID:37788673
Epub 2023 Oct 2. ATR promotes clearance of damaged DNA and damaged cells by rupturing micronuclei.
GO:0007077 mitotic nuclear membrane disassembly
IDA
PMID:2188730
Identification of cell cycle-regulated phosphorylation sites...
ACCEPT
Summary: CDK1 phosphorylates nuclear lamins to promote nuclear envelope breakdown. Classic CDK1 function demonstrated in foundational studies.
Reason: Nuclear envelope breakdown via lamin phosphorylation is a canonical CDK1 function.
Supporting Evidence:
PMID:2188730
Identification of cell cycle-regulated phosphorylation sites on nuclear lamin C.
GO:0000086 G2/M transition of mitotic cell cycle
IDA
PMID:2188730
Identification of cell cycle-regulated phosphorylation sites...
ACCEPT
Summary: G2/M transition is THE core function of CDK1. It is uniquely required among all CDKs for mammalian cell division.
Reason: This is the canonical, essential function of CDK1.
Supporting Evidence:
PMID:2188730
Identification of cell cycle-regulated phosphorylation sites on nuclear lamin C.
GO:0000086 G2/M transition of mitotic cell cycle
IDA
PMID:2344612
Mutations of phosphorylation sites in lamin A that prevent n...
ACCEPT
Summary: G2/M transition is THE core function of CDK1. It is uniquely required among all CDKs for mammalian cell division.
Reason: This is the canonical, essential function of CDK1.
Supporting Evidence:
PMID:2344612
Mutations of phosphorylation sites in lamin A that prevent nuclear lamina disassembly in mitosis.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IDA
PMID:2188730
Identification of cell cycle-regulated phosphorylation sites...
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
Supporting Evidence:
PMID:2188730
Identification of cell cycle-regulated phosphorylation sites on nuclear lamin C.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IDA
PMID:2344612
Mutations of phosphorylation sites in lamin A that prevent n...
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
Supporting Evidence:
PMID:2344612
Mutations of phosphorylation sites in lamin A that prevent nuclear lamina disassembly in mitosis.
GO:0004674 protein serine/threonine kinase activity
IDA
PMID:34741373
CDK1/FBXW7 facilitates degradation and ubiquitination of MLS...
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
Supporting Evidence:
PMID:34741373
CDK1/FBXW7 facilitates degradation and ubiquitination of MLST8 to inhibit progression of renal cell carcinoma.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9836184
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IDA
PMID:34734636
Mitotic chromosome condensation requires phosphorylation of ...
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
Supporting Evidence:
PMID:34734636
Dec 2. Mitotic chromosome condensation requires phosphorylation of the centromeric protein KNL-2 in C.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IDA
PMID:10791892
Ser787 in the proline-rich region of human MAP4 is a critica...
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
Supporting Evidence:
PMID:10791892
Ser787 in the proline-rich region of human MAP4 is a critical phosphorylation site that reduces its activity to promote tubulin polymerization.
GO:1902850 microtubule cytoskeleton organization involved in mitosis
IDA
PMID:10791892
Ser787 in the proline-rich region of human MAP4 is a critica...
ACCEPT
Summary: CDK1 phosphorylates MAP4 and other microtubule-associated proteins to regulate microtubule dynamics during mitosis.
Reason: This is part of CDK1's core mitotic function - regulating the microtubule cytoskeleton for spindle assembly.
Supporting Evidence:
PMID:10791892
Ser787 in the proline-rich region of human MAP4 is a critical phosphorylation site that reduces its activity to promote tubulin polymerization.
GO:0004674 protein serine/threonine kinase activity
IDA
PMID:26829474
Acetylation of Aurora B by TIP60 ensures accurate chromosoma...
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
Supporting Evidence:
PMID:26829474
Feb 1. Acetylation of Aurora B by TIP60 ensures accurate chromosomal segregation.
GO:0062033 positive regulation of mitotic sister chromatid segregation
IDA
PMID:26829474
Acetylation of Aurora B by TIP60 ensures accurate chromosoma...
ACCEPT
Summary: CDK1 promotes chromosome segregation through various substrates including effects on Aurora B.
Reason: Sister chromatid segregation is part of CDK1's core mitotic function.
Supporting Evidence:
PMID:26829474
Feb 1. Acetylation of Aurora B by TIP60 ensures accurate chromosomal segregation.
GO:0016301 kinase activity
IDA
PMID:28575661
RECQ5 Helicase Cooperates with MUS81 Endonuclease in Process...
ACCEPT
Summary: CDK1 is a kinase. This is a very general parent term.
Reason: True but generic. More specific kinase activity terms are more informative.
Supporting Evidence:
PMID:28575661
RECQ5 Helicase Cooperates with MUS81 Endonuclease in Processing Stalled Replication Forks at Common Fragile Sites during Mitosis.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IDA
PMID:25753036
Cdk1 phosphorylates SPAT-1/Bora to trigger PLK-1 activation ...
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
Supporting Evidence:
PMID:25753036
Mar 9. Cdk1 phosphorylates SPAT-1/Bora to trigger PLK-1 activation and drive mitotic entry in C.
GO:0004674 protein serine/threonine kinase activity
IDA
PMID:7588608
ERF: an ETS domain protein with strong transcriptional repre...
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
Supporting Evidence:
PMID:7588608
ERF: an ETS domain protein with strong transcriptional repressor activity, can suppress ets-associated tumorigenesis and is regulated by phosphorylation during cell cycle and mitogenic stimulation.
GO:0004672 protein kinase activity
IDA
PMID:23574715
The novel actin/focal adhesion-associated protein MISP is in...
ACCEPT
Summary: CDK1 has protein kinase activity. This is a parent term of the more specific cyclin-dependent protein serine/threonine kinase activity.
Reason: True but generic. The more specific cyclin-dependent protein kinase activity terms are more informative.
Supporting Evidence:
PMID:23574715
The novel actin/focal adhesion-associated protein MISP is involved in mitotic spindle positioning in human cells.
GO:0005515 protein binding
IPI
PMID:23509069
MISP is a novel Plk1 substrate required for proper spindle o...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:23509069
MISP is a novel Plk1 substrate required for proper spindle orientation and mitotic progression.
GO:0005515 protein binding
IPI
PMID:27238018
Circadian Amplitude Regulation via FBXW7-Targeted REV-ERBΞ± D...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:27238018
May 26. Circadian Amplitude Regulation via FBXW7-Targeted REV-ERBΞ± Degradation.
GO:0018107 peptidyl-threonine phosphorylation
IMP
PMID:27238018
Circadian Amplitude Regulation via FBXW7-Targeted REV-ERBΞ± D...
ACCEPT
Summary: CDK1 phosphorylates threonine residues. This is consistent with its S/T kinase activity.
Reason: Consistent with core kinase activity.
Supporting Evidence:
PMID:27238018
May 26. Circadian Amplitude Regulation via FBXW7-Targeted REV-ERBΞ± Degradation.
GO:0042752 regulation of circadian rhythm
IMP
PMID:27238018
Circadian Amplitude Regulation via FBXW7-Targeted REV-ERBΞ± D...
KEEP AS NON CORE
Summary: CDK1 phosphorylation of REV-ERBalpha affects circadian rhythm. This is a documented but non-core function.
Reason: Circadian regulation is a documented function but not the core evolved purpose of CDK1.
Supporting Evidence:
PMID:27238018
May 26. Circadian Amplitude Regulation via FBXW7-Targeted REV-ERBΞ± Degradation.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IDA
PMID:23601106
The retroviral restriction ability of SAMHD1, but not its de...
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
Supporting Evidence:
PMID:23601106
The retroviral restriction ability of SAMHD1, but not its deoxynucleotide triphosphohydrolase activity, is regulated by phosphorylation.
GO:0005515 protein binding
IPI
PMID:23601106
The retroviral restriction ability of SAMHD1, but not its de...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:23601106
The retroviral restriction ability of SAMHD1, but not its deoxynucleotide triphosphohydrolase activity, is regulated by phosphorylation.
GO:0005634 nucleus
IDA
PMID:15767402
Human papillomavirus type 16 E1 E4-induced G2 arrest is asso...
ACCEPT
Summary: CDK1 localizes to the nucleus at G2 and during nuclear envelope breakdown.
Reason: Nuclear localization is well-established for CDK1-cyclin B complexes.
Supporting Evidence:
PMID:15767402
Human papillomavirus type 16 E1 E4-induced G2 arrest is associated with cytoplasmic retention of active Cdk1/cyclin B1 complexes.
GO:0005737 cytoplasm
IDA
PMID:15767402
Human papillomavirus type 16 E1 E4-induced G2 arrest is asso...
ACCEPT
Summary: CDK1-cyclin complexes are present in the cytoplasm and shuttle between cytoplasm and nucleus.
Reason: Cytoplasmic localization is well-documented, particularly for CDK1-cyclin B complexes which are retained in cytoplasm until mitotic entry.
Supporting Evidence:
PMID:15767402
Human papillomavirus type 16 E1 E4-induced G2 arrest is associated with cytoplasmic retention of active Cdk1/cyclin B1 complexes.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IMP
PMID:24746669
Cyclin B1/Cdk1 coordinates mitochondrial respiration for cel...
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
Supporting Evidence:
PMID:24746669
2014 Apr 17. Cyclin B1/Cdk1 coordinates mitochondrial respiration for cell-cycle G2/M progression.
GO:0005759 mitochondrial matrix
IDA
PMID:24746669
Cyclin B1/Cdk1 coordinates mitochondrial respiration for cel...
ACCEPT
Summary: CDK1-cyclin B1 localization to mitochondrial matrix has been documented with roles in regulating ATP synthesis at G2/M.
Reason: Mitochondrial matrix localization has experimental support.
Supporting Evidence:
PMID:24746669
2014 Apr 17. Cyclin B1/Cdk1 coordinates mitochondrial respiration for cell-cycle G2/M progression.
GO:0010971 positive regulation of G2/M transition of mitotic cell cycle
IMP
PMID:24746669
Cyclin B1/Cdk1 coordinates mitochondrial respiration for cel...
ACCEPT
Summary: CDK1 promotes G2/M transition - this is its core function.
Reason: Core function.
Supporting Evidence:
PMID:24746669
2014 Apr 17. Cyclin B1/Cdk1 coordinates mitochondrial respiration for cell-cycle G2/M progression.
GO:0030332 cyclin binding
IPI
PMID:24746669
Cyclin B1/Cdk1 coordinates mitochondrial respiration for cel...
ACCEPT
Summary: CDK1 binds cyclins (A and B). This is essential for its activity.
Reason: Cyclin binding is essential for CDK1 function. More informative than generic protein binding.
Supporting Evidence:
PMID:24746669
2014 Apr 17. Cyclin B1/Cdk1 coordinates mitochondrial respiration for cell-cycle G2/M progression.
GO:0097125 cyclin B1-CDK1 complex
IMP
PMID:24746669
Cyclin B1/Cdk1 coordinates mitochondrial respiration for cel...
ACCEPT
Summary: CDK1 forms complex with cyclin B1. This is the active holoenzyme.
Reason: The cyclin B1-CDK1 complex is the principal active form of CDK1 in mitosis.
Supporting Evidence:
PMID:24746669
2014 Apr 17. Cyclin B1/Cdk1 coordinates mitochondrial respiration for cell-cycle G2/M progression.
GO:1905448 positive regulation of mitochondrial ATP synthesis coupled electron transport
IMP
PMID:24746669
Cyclin B1/Cdk1 coordinates mitochondrial respiration for cel...
KEEP AS NON CORE
Summary: CDK1-cyclin B1 phosphorylates mitochondrial substrates to boost ATP production at G2/M. This coordinates energy metabolism with cell cycle.
Reason: While documented, metabolic regulation is a secondary function that supports the primary cell cycle role.
Supporting Evidence:
PMID:24746669
2014 Apr 17. Cyclin B1/Cdk1 coordinates mitochondrial respiration for cell-cycle G2/M progression.
GO:0000307 cyclin-dependent protein kinase holoenzyme complex
IDA
PMID:1312467
Cyclin A is required at two points in the human cell cycle.
ACCEPT
Summary: CDK1 functions as part of the CDK holoenzyme complex with cyclins.
Reason: CDK1 requires cyclin binding for activity.
Supporting Evidence:
PMID:1312467
Cyclin A is required at two points in the human cell cycle.
GO:0097472 cyclin-dependent protein kinase activity
IDA
PMID:1312467
Cyclin A is required at two points in the human cell cycle.
ACCEPT
Summary: CDK1 has cyclin-dependent protein kinase activity. This is its core molecular function.
Reason: This is the core molecular function of CDK1.
Supporting Evidence:
PMID:1312467
Cyclin A is required at two points in the human cell cycle.
GO:0030332 cyclin binding
IPI
PMID:1312467
Cyclin A is required at two points in the human cell cycle.
ACCEPT
Summary: CDK1 binds cyclins (A and B). This is essential for its activity.
Reason: Cyclin binding is essential for CDK1 function. More informative than generic protein binding.
Supporting Evidence:
PMID:1312467
Cyclin A is required at two points in the human cell cycle.
GO:0005789 endoplasmic reticulum membrane
TAS
Reactome:R-HSA-8940100
ACCEPT
Summary: CDK1 may localize to ER membrane in some contexts.
Reason: ER-associated CDK1 has been documented.
GO:0030332 cyclin binding
IDA
PMID:7739547
Novel INK4 proteins, p19 and p18, are specific inhibitors of...
ACCEPT
Summary: CDK1 binds cyclins (A and B). This is essential for its activity.
Reason: Cyclin binding is essential for CDK1 function. More informative than generic protein binding.
Supporting Evidence:
PMID:7739547
Novel INK4 proteins, p19 and p18, are specific inhibitors of the cyclin D-dependent kinases CDK4 and CDK6.
GO:0005515 protein binding
IPI
PMID:26808496
Comparative Proteomics Reveals Important Viral-Host Interact...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:26808496
eCollection 2016. Comparative Proteomics Reveals Important Viral-Host Interactions in HCV-Infected Human Liver Cells.
GO:0004674 protein serine/threonine kinase activity
IDA
PMID:27030108
Phosphorylation of EB2 by Aurora B and CDK1 ensures mitotic ...
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
Supporting Evidence:
PMID:27030108
Phosphorylation of EB2 by Aurora B and CDK1 ensures mitotic progression and genome stability.
GO:0004674 protein serine/threonine kinase activity
IDA
PMID:21871177
Ribosomal protein S3 is phosphorylated by Cdk1/cdc2 during G...
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
Supporting Evidence:
PMID:21871177
Ribosomal protein S3 is phosphorylated by Cdk1/cdc2 during G2/M phase.
GO:0005515 protein binding
IPI
PMID:21871177
Ribosomal protein S3 is phosphorylated by Cdk1/cdc2 during G...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:21871177
Ribosomal protein S3 is phosphorylated by Cdk1/cdc2 during G2/M phase.
GO:0035173 histone kinase activity
IDA
PMID:21871177
Ribosomal protein S3 is phosphorylated by Cdk1/cdc2 during G...
ACCEPT
Summary: CDK1 phosphorylates histones including H1 and H3. This is part of mitotic chromatin regulation.
Reason: Histone phosphorylation by CDK1 is documented and functionally relevant for mitotic chromatin dynamics.
Supporting Evidence:
PMID:21871177
Ribosomal protein S3 is phosphorylated by Cdk1/cdc2 during G2/M phase.
GO:1900182 positive regulation of protein localization to nucleus
IMP
PMID:21871177
Ribosomal protein S3 is phosphorylated by Cdk1/cdc2 during G...
KEEP AS NON CORE
Summary: CDK1 phosphorylation can regulate nuclear localization of substrates.
Reason: Downstream effect of kinase activity on specific substrates.
Supporting Evidence:
PMID:21871177
Ribosomal protein S3 is phosphorylated by Cdk1/cdc2 during G2/M phase.
GO:0090166 Golgi disassembly
ISS
GO_REF:0000024
ACCEPT
Summary: CDK1 phosphorylates GRASP65/GM130 and other Golgi proteins to promote Golgi fragmentation during mitosis.
Reason: Golgi disassembly is a documented mitotic function mediated by CDK1 phosphorylation of Golgi structural proteins.
GO:0000781 chromosome, telomeric region
HDA
PMID:19135898
Purification of proteins associated with specific genomic Lo...
KEEP AS NON CORE
Summary: CDK1 association with telomeric regions has been detected in high-throughput analysis.
Reason: Telomeric localization may be part of chromosome-associated functions but is not a core function.
Supporting Evidence:
PMID:19135898
Purification of proteins associated with specific genomic Loci.
GO:0004672 protein kinase activity
IDA
PMID:22854038
Polo-like kinase is required for synaptonemal complex disass...
ACCEPT
Summary: CDK1 has protein kinase activity. This is a parent term of the more specific cyclin-dependent protein serine/threonine kinase activity.
Reason: True but generic. The more specific cyclin-dependent protein kinase activity terms are more informative.
Supporting Evidence:
PMID:22854038
Aug 1. Polo-like kinase is required for synaptonemal complex disassembly and phosphorylation in mouse spermatocytes.
GO:0004674 protein serine/threonine kinase activity
IDA
PMID:11298763
Molecular cloning of a mammalian nuclear phosphoprotein NUCK...
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
Supporting Evidence:
PMID:11298763
Molecular cloning of a mammalian nuclear phosphoprotein NUCKS, which serves as a substrate for Cdk1 in vivo.
GO:0016020 membrane
HDA
PMID:19946888
Defining the membrane proteome of NK cells.
KEEP AS NON CORE
Summary: CDK1 detected in membrane fraction in proteomic analysis.
Reason: Membrane association is not a core localization.
Supporting Evidence:
PMID:19946888
Defining the membrane proteome of NK cells.
GO:0005813 centrosome
IDA
PMID:17488717
Mitotic regulation of SIRT2 by cyclin-dependent kinase 1-dep...
ACCEPT
Summary: CDK1 localizes to centrosomes where it is first activated at mitotic entry and regulates centrosome maturation and separation.
Reason: Centrosomal localization is well-established and functionally important for CDK1 activation and mitotic spindle organization.
Supporting Evidence:
PMID:17488717
2007 May 8. Mitotic regulation of SIRT2 by cyclin-dependent kinase 1-dependent phosphorylation.
GO:0072686 mitotic spindle
IDA
PMID:17488717
Mitotic regulation of SIRT2 by cyclin-dependent kinase 1-dep...
ACCEPT
Summary: CDK1 localizes to mitotic spindle.
Reason: Spindle localization is part of core mitotic function.
Supporting Evidence:
PMID:17488717
2007 May 8. Mitotic regulation of SIRT2 by cyclin-dependent kinase 1-dependent phosphorylation.
GO:0004674 protein serine/threonine kinase activity
IDA
PMID:19879842
Regulation of MBK-2/DYRK by CDK-1 and the pseudophosphatases...
ACCEPT
Summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P motifs. This is well-established biochemically.
Reason: Accurate but generic. The cyclin-dependent kinase activity term captures this more specifically.
Supporting Evidence:
PMID:19879842
Regulation of MBK-2/DYRK by CDK-1 and the pseudophosphatases EGG-4 and EGG-5 during the oocyte-to-embryo transition.
GO:0030855 epithelial cell differentiation
IEP
PMID:21492153
Analysis of proteomic changes induced upon cellular differen...
MARK AS OVER ANNOTATED
Summary: CDK1 expression changes during epithelial differentiation.
Reason: Expression changes during differentiation do not make differentiation a function of CDK1. CDK1 promotes proliferation, which decreases during differentiation.
Supporting Evidence:
PMID:21492153
Analysis of proteomic changes induced upon cellular differentiation of the human intestinal cell line Caco-2.
GO:0070062 extracellular exosome
HDA
PMID:19056867
Large-scale proteomics and phosphoproteomics of urinary exos...
KEEP AS NON CORE
Summary: CDK1 detected in exosomes in proteomic analysis.
Reason: Exosomal presence is not a core function or localization.
Supporting Evidence:
PMID:19056867
2008 Dec 3. Large-scale proteomics and phosphoproteomics of urinary exosomes.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-170044
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-170070
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-170072
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-170153
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-170156
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-170158
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-170044
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-170072
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-170161
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-170131
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-174122
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-174132
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-174251
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-2245218
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-2294600
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-380278
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-4088024
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-5195402
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-5244669
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-5692755
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-6793661
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-9009282
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-9929514
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-9929533
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-9929535
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-9929717
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-9929719
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-9929720
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-9929721
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-9929884
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-9929904
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-9929935
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-NUL-2434198
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-112342
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-170126
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-170131
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-174104
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-174120
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-174157
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-174171
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-174227
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-174255
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-2468287
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-2468293
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-2984220
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-2990882
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-4086410
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9624800
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9929532
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9929533
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-NUL-2422970
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-170076
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-170087
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-170088
ACCEPT
Summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear functions.
Reason: Nucleoplasm localization is well-established for CDK1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-170055
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-170057
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-170088
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-170116
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-2574840
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-2574845
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-3000310
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-3000319
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-380272
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-380283
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-380294
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-380303
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-380311
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-380316
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-380455
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-380508
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-5617816
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-5626220
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-5626223
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-5626227
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-5626228
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-5626681
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-5626699
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-5638009
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-6803875
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-8853405
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-8853419
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9928875
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9928887
ACCEPT
Summary: CDK1 localizes to the cytosol. Well-established localization.
Reason: Cytosolic localization is well-documented.
GO:0005515 protein binding
IPI
PMID:11687586
RGC-32 increases p34CDC2 kinase activity and entry of aortic...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:11687586
Oct 30. RGC-32 increases p34CDC2 kinase activity and entry of aortic smooth muscle cells into S-phase.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IDA
PMID:18477460
Myosin phosphatase-targeting subunit 1 regulates mitosis by ...
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
Supporting Evidence:
PMID:18477460
Myosin phosphatase-targeting subunit 1 regulates mitosis by antagonizing polo-like kinase 1.
GO:0005515 protein binding
IPI
PMID:15148369
Role of Polo-like kinase in the degradation of early mitotic...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:15148369
Role of Polo-like kinase in the degradation of early mitotic inhibitor 1, a regulator of the anaphase promoting complex/cyclosome.
GO:0005515 protein binding
IPI
PMID:18477460
Myosin phosphatase-targeting subunit 1 regulates mitosis by ...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:18477460
Myosin phosphatase-targeting subunit 1 regulates mitosis by antagonizing polo-like kinase 1.
GO:0000226 microtubule cytoskeleton organization
TAS
PMID:21655336
Checkpoint recovery in cells: how a molecular understanding ...
ACCEPT
Summary: CDK1 regulates microtubule cytoskeleton organization during mitosis.
Reason: Part of core mitotic function.
Supporting Evidence:
PMID:21655336
Checkpoint recovery in cells: how a molecular understanding can help in the fight against cancer.
GO:0005739 mitochondrion
TAS
PMID:19917720
Cyclin-dependent kinase 1-mediated Bcl-xL/Bcl-2 phosphorylat...
ACCEPT
Summary: CDK1-cyclin B1 localizes to mitochondria and phosphorylates mitochondrial substrates including Complex I subunits to boost ATP synthesis at G2/M.
Reason: Mitochondrial localization of CDK1-cyclin B1 has been documented with functional roles in regulating mitochondrial respiration at cell cycle transitions.
Supporting Evidence:
PMID:19917720
Cyclin-dependent kinase 1-mediated Bcl-xL/Bcl-2 phosphorylation acts as a functional link coupling mitotic arrest and apoptosis.
GO:0006260 DNA replication
TAS
PMID:21655336
Checkpoint recovery in cells: how a molecular understanding ...
KEEP AS NON CORE
Summary: CDK1 has roles in DNA replication origin licensing, though CDK2 is traditionally the S-phase CDK.
Reason: DNA replication is a secondary function.
Supporting Evidence:
PMID:21655336
Checkpoint recovery in cells: how a molecular understanding can help in the fight against cancer.
GO:0006281 DNA repair
TAS
PMID:21655336
Checkpoint recovery in cells: how a molecular understanding ...
KEEP AS NON CORE
Summary: CDK1 phosphorylates DNA repair proteins including CtIP.
Reason: DNA repair effects are through substrate phosphorylation, not a core function.
Supporting Evidence:
PMID:21655336
Checkpoint recovery in cells: how a molecular understanding can help in the fight against cancer.
GO:0007098 centrosome cycle
TAS
PMID:19364923
The decision to enter mitosis: feedback and redundancy in th...
ACCEPT
Summary: CDK1 regulates centrosome maturation and separation.
Reason: Centrosome regulation is part of core mitotic function.
Supporting Evidence:
PMID:19364923
Apr 13. The decision to enter mitosis: feedback and redundancy in the mitotic entry network.
GO:0007344 pronuclear fusion
TAS
PMID:21535261
Cdc2: a monopotent or pluripotent CDK?
KEEP AS NON CORE
Summary: CDK1 involvement in pronuclear fusion is documented.
Reason: This is a specialized cell type-specific function.
Supporting Evidence:
PMID:21535261
Cdc2: a monopotent or pluripotent CDK? Hu X(1), Moscinski LC.
GO:0014038 regulation of Schwann cell differentiation
TAS
PMID:17200138
Cdc2-mediated Schwann cell migration during peripheral nerve...
KEEP AS NON CORE
Summary: CDK1 affects Schwann cell migration and differentiation.
Reason: Cell type-specific differentiation effects are not core function.
Supporting Evidence:
PMID:17200138
Jan 2. Cdc2-mediated Schwann cell migration during peripheral nerve regeneration.
GO:0016477 cell migration
TAS
PMID:17200138
Cdc2-mediated Schwann cell migration during peripheral nerve...
KEEP AS NON CORE
Summary: CDK1 affects cell migration in regenerating nerves.
Reason: Cell migration is not a core function of CDK1.
Supporting Evidence:
PMID:17200138
Jan 2. Cdc2-mediated Schwann cell migration during peripheral nerve regeneration.
GO:0045995 regulation of embryonic development
TAS
PMID:21535261
Cdc2: a monopotent or pluripotent CDK?
KEEP AS NON CORE
Summary: CDK1 is required for cell division during embryonic development.
Reason: CDK1 is required for cell division in all contexts; embryonic development per se is not a specific function.
Supporting Evidence:
PMID:21535261
Cdc2: a monopotent or pluripotent CDK? Hu X(1), Moscinski LC.
GO:0034501 protein localization to kinetochore
IDA
PMID:18195732
Cyclin B1 is localized to unattached kinetochores and contri...
ACCEPT
Summary: CDK1 phosphorylation promotes localization of proteins to kinetochores.
Reason: Kinetochore function is part of CDK1's core mitotic role.
Supporting Evidence:
PMID:18195732
Cyclin B1 is localized to unattached kinetochores and contributes to efficient microtubule attachment and proper chromosome alignment during mitosis.
GO:0008353 RNA polymerase II CTD heptapeptide repeat kinase activity
IDA
PMID:12721286
A novel RNA polymerase II C-terminal domain phosphatase that...
ACCEPT
Summary: CDK1 can phosphorylate the RNA Pol II CTD. This activity has been demonstrated biochemically.
Reason: This is a documented enzymatic activity of CDK1, though not its primary function.
Supporting Evidence:
PMID:12721286
2003 Apr 28. A novel RNA polymerase II C-terminal domain phosphatase that preferentially dephosphorylates serine 5.
GO:0005515 protein binding
IPI
PMID:11574543
The G2/M regulator 14-3-3sigma prevents apoptosis through se...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:11574543
2001 Sep 26. The G2/M regulator 14-3-3sigma prevents apoptosis through sequestration of Bax.
GO:0004693 cyclin-dependent protein serine/threonine kinase activity
IDA
PMID:11069302
Regulation of apoptosis at cell division by p34cdc2 phosphor...
ACCEPT
Summary: This is the most appropriate molecular function term for CDK1. The enzyme requires cyclin binding for activity and phosphorylates serine/threonine residues.
Reason: This is the core molecular function of CDK1 and accurately describes its catalytic activity and cyclin-dependence.
Supporting Evidence:
PMID:11069302
Regulation of apoptosis at cell division by p34cdc2 phosphorylation of survivin.
GO:0005515 protein binding
IPI
PMID:11069302
Regulation of apoptosis at cell division by p34cdc2 phosphor...
REMOVE
Summary: Generic protein binding annotation from interaction study.
Reason: "Protein binding" is uninformative per GO curation guidelines. More specific molecular function terms should be used.
Supporting Evidence:
PMID:11069302
Regulation of apoptosis at cell division by p34cdc2 phosphorylation of survivin.
GO:0005876 spindle microtubule
IDA
PMID:11069302
Regulation of apoptosis at cell division by p34cdc2 phosphor...
ACCEPT
Summary: CDK1-survivin association on spindle microtubules.
Reason: Spindle localization is established.
Supporting Evidence:
PMID:11069302
Regulation of apoptosis at cell division by p34cdc2 phosphorylation of survivin.
GO:0030496 midbody
IDA
PMID:11069302
Regulation of apoptosis at cell division by p34cdc2 phosphor...
ACCEPT
Summary: CDK1 detected at midbody in cytokinesis context.
Reason: Midbody localization during cytokinesis is consistent with mitotic function.
Supporting Evidence:
PMID:11069302
Regulation of apoptosis at cell division by p34cdc2 phosphorylation of survivin.
GO:0043066 negative regulation of apoptotic process
IDA
PMID:11069302
Regulation of apoptosis at cell division by p34cdc2 phosphor...
MARK AS OVER ANNOTATED
Summary: CDK1 phosphorylation of survivin maintains its anti-apoptotic function during mitosis. However, this represents CDK1 ensuring cell survival during division, not an evolved anti-apoptotic function.
Reason: CDK1 phosphorylates survivin to maintain cell viability during mitosis - this is part of ensuring successful cell division, not a dedicated anti-apoptotic function. Annotating CDK1 to apoptosis regulation conflates substrate effects with core function.
Supporting Evidence:
PMID:11069302
Regulation of apoptosis at cell division by p34cdc2 phosphorylation of survivin.
GO:0005634 nucleus
IDA
PMID:16109376
The bromodomain protein Brd4 is a positive regulatory compon...
ACCEPT
Summary: CDK1 localizes to the nucleus at G2 and during nuclear envelope breakdown.
Reason: Nuclear localization is well-established for CDK1-cyclin B complexes.
Supporting Evidence:
PMID:16109376
The bromodomain protein Brd4 is a positive regulatory component of P-TEFb and stimulates RNA polymerase II-dependent transcription.
GO:0004672 protein kinase activity
NAS
PMID:9001210
The human Myt1 kinase preferentially phosphorylates Cdc2 on ...
ACCEPT
Summary: CDK1 has protein kinase activity. This is a parent term of the more specific cyclin-dependent protein serine/threonine kinase activity.
Reason: True but generic. The more specific cyclin-dependent protein kinase activity terms are more informative.
Supporting Evidence:
PMID:9001210
The human Myt1 kinase preferentially phosphorylates Cdc2 on threonine 14 and localizes to the endoplasmic reticulum and Golgi complex.

Core Functions

CDK1 is the essential cyclin-dependent kinase for cell division. It forms holoenzyme complexes with cyclin B1 (principally) or cyclin A, and with CKS1/2 phospho-adaptors. CDK1 phosphorylates substrates on S/T-P motifs and drives the G2/M transition by phosphorylating over 1000 substrates including lamins, condensins, and numerous mitotic machinery proteins.

References

Gene Ontology annotation through association of InterPro records with GO terms
Manual transfer of experimentally-verified manual GO annotation data to orthologs by curator judgment of sequence similarity
Annotation inferences using phylogenetic trees
Gene Ontology annotation based on UniProtKB/Swiss-Prot keyword mapping
Gene Ontology annotation based on UniProtKB/Swiss-Prot Subcellular Location vocabulary mapping, accompanied by conservative changes to GO terms applied by UniProt
Gene Ontology annotation based on curation of immunofluorescence data
Automatic transfer of experimentally verified manual GO annotation data to orthologs using Ensembl Compara
Automatic assignment of GO terms using logical inference, based on on inter-ontology links
Automatic Gene Ontology annotation based on Rhea mapping
Combined Automated Annotation using Multiple IEA Methods
Overproduction of human Myt1 kinase induces a G2 cell cycle delay by interfering with the intracellular trafficking of Cdc2-cyclin B1 complexes.
Ser787 in the proline-rich region of human MAP4 is a critical phosphorylation site that reduces its activity to promote tubulin polymerization.
Regulation of apoptosis at cell division by p34cdc2 phosphorylation of survivin.
Molecular cloning of a mammalian nuclear phosphoprotein NUCKS, which serves as a substrate for Cdk1 in vivo.
The G2/M regulator 14-3-3sigma prevents apoptosis through sequestration of Bax.
RGC-32 increases p34CDC2 kinase activity and entry of aortic smooth muscle cells into S-phase.
A novel RING finger protein, human enhancer of invasion 10, alters mitotic progression through regulation of cyclin B levels.
A novel RNA polymerase II C-terminal domain phosphatase that preferentially dephosphorylates serine 5.
Cyclin A is required at two points in the human cell cycle.
Role of Polo-like kinase in the degradation of early mitotic inhibitor 1, a regulator of the anaphase promoting complex/cyclosome.
Phosphotyrosine signaling networks in epidermal growth factor receptor overexpressing squamous carcinoma cells.
Human papillomavirus type 16 E1 E4-induced G2 arrest is associated with cytoplasmic retention of active Cdk1/cyclin B1 complexes.
The bromodomain protein Brd4 is a positive regulatory component of P-TEFb and stimulates RNA polymerase II-dependent transcription.
Cdc2-mediated Schwann cell migration during peripheral nerve regeneration.
Death-effector domain-containing protein DEDD is an inhibitor of mitotic Cdk1/cyclin B1.
Fez1/Lzts1 absence impairs Cdk1/Cdc25C interaction during mitosis and predisposes mice to cancer development.
Mitotic regulation of SIRT2 by cyclin-dependent kinase 1-dependent phosphorylation.
Cyclin B and cyclin A confer different substrate recognition properties on CDK2.
Cell death in leukemia: passenger protein regulation by topoisomerase inhibitors.
Cyclin B1 is localized to unattached kinetochores and contributes to efficient microtubule attachment and proper chromosome alignment during mitosis.
cdc2-cyclin B regulates eEF2 kinase activity in a cell cycle- and amino acid-dependent manner.
CDK1 promotes cell proliferation and survival via phosphorylation and inhibition of FOXO1 transcription factor.
Myosin phosphatase-targeting subunit 1 regulates mitosis by antagonizing polo-like kinase 1.
Large-scale proteomics and phosphoproteomics of urinary exosomes.
Purification of proteins associated with specific genomic Loci.
Human CtIP mediates cell cycle control of DNA end resection and double strand break repair.
The decision to enter mitosis: feedback and redundancy in the mitotic entry network.
Regulation of MBK-2/DYRK by CDK-1 and the pseudophosphatases EGG-4 and EGG-5 during the oocyte-to-embryo transition.
Cyclin-dependent kinase 1-mediated Bcl-xL/Bcl-2 phosphorylation acts as a functional link coupling mitotic arrest and apoptosis.
Defining the membrane proteome of NK cells.
New Cdc2 Tyr 4 phosphorylation by dsRNA-activated protein kinase triggers Cdc2 polyubiquitination and G2 arrest under genotoxic stresses.
Cell division cycle 6, a mitotic substrate of polo-like kinase 1, regulates chromosomal segregation mediated by cyclin-dependent kinase 1 and separase.
Analysis of proteomic changes induced upon cellular differentiation of the human intestinal cell line Caco-2.
Cdc2: a monopotent or pluripotent CDK?
Checkpoint recovery in cells: how a molecular understanding can help in the fight against cancer.
Ribosomal protein S3 is phosphorylated by Cdk1/cdc2 during G2/M phase.
Identification of cell cycle-regulated phosphorylation sites on nuclear lamin C.
M phase phosphorylation of the epigenetic regulator UHRF1 regulates its physical association with the deubiquitylase USP7 and stability.
Polo-like kinase is required for synaptonemal complex disassembly and phosphorylation in mouse spermatocytes.
Mutations of phosphorylation sites in lamin A that prevent nuclear lamina disassembly in mitosis.
MISP is a novel Plk1 substrate required for proper spindle orientation and mitotic progression.
Ubiquitin C-terminal hydrolase L1 (UCH-L1) acts as a novel potentiator of cyclin-dependent kinases to enhance cell proliferation independently of its hydrolase activity.
The novel actin/focal adhesion-associated protein MISP is involved in mitotic spindle positioning in human cells.
The retroviral restriction ability of SAMHD1, but not its deoxynucleotide triphosphohydrolase activity, is regulated by phosphorylation.
The protein interaction landscape of the human CMGC kinase group.
Sulforaphane induced cell cycle arrest in the G2/M phase via the blockade of cyclin B1/CDC2 in human ovarian cancer cells.
CDK10/cyclin M is a protein kinase that controls ETS2 degradation and is deficient in STAR syndrome.
Polycomb protein SCML2 regulates the cell cycle by binding and modulating CDK/CYCLIN/p21 complexes.
The mammalian-membrane two-hybrid assay (MaMTH) for probing membrane-protein interactions in human cells.
Cyclin B1/Cdk1 coordinates mitochondrial respiration for cell-cycle G2/M progression.
Ki67 antigen contributes to the timely accumulation of protein phosphatase 1Ξ³ on anaphase chromosomes.
RASSF1A-LATS1 signalling stabilizes replication forks by restricting CDK2-mediated phosphorylation ofΒ BRCA2.
A proteome-scale map of the human interactome network.
Cdk1 phosphorylates SPAT-1/Bora to trigger PLK-1 activation and drive mitotic entry in C. elegans embryos.
Integrative analysis of kinase networks in TRAIL-induced apoptosis provides a source of potential targets for combination therapy.
A human interactome in three quantitative dimensions organized by stoichiometries and abundances.
Comparative Proteomics Reveals Important Viral-Host Interactions in HCV-Infected Human Liver Cells.
Acetylation of Aurora B by TIP60 ensures accurate chromosomal segregation.
Phosphorylation of EB2 by Aurora B and CDK1 ensures mitotic progression and genome stability.
Circadian Amplitude Regulation via FBXW7-Targeted REV-ERBΞ± Degradation.
Sulforaphane, a Dietary Isothiocyanate, Induces Gβ‚‚/M Arrest in Cervical Cancer Cells through CyclinB1 Downregulation and GADD45Ξ²/CDC2 Association.
Phenotypic and Interaction Profiling of the Human Phosphatases Identifies Diverse Mitotic Regulators.
Ska3 Phosphorylated by Cdk1 Binds Ndc80 and Recruits Ska to Kinetochores to Promote Mitotic Progression.
Architecture of the human interactome defines protein communities and disease networks.
RECQ5 Helicase Cooperates with MUS81 Endonuclease in Processing Stalled Replication Forks at Common Fragile Sites during Mitosis.
A Map of Human Mitochondrial Protein Interactions Linked to Neurodegeneration Reveals New Mechanisms of Redox Homeostasis and NF-ΞΊB Signaling.
An intrinsic S/G(2) checkpoint enforced by ATR.
A protein-interaction network of interferon-stimulated genes extends the innate immune system landscape.
Phosphorylation of Ci/Gli by Fused Family Kinases Promotes Hedgehog Signaling.
Molecular determinants of the Ska-Ndc80 interaction and their influence on microtubule tracking and force-coupling.
Extensive rewiring of the EGFR network in colorectal cancer cells expressing transforming levels of KRAS(G13D).
Multisite phosphorylation determines the formation of Ska-Ndc80 macro-complexes that are essential for chromosome segregation during mitosis.
Kinase Interaction Network Expands Functional and Disease Roles of Human Kinases.
Interactome Mapping Provides a Network of Neurodegenerative Disease Proteins and Uncovers Widespread Protein Aggregation in Affected Brains.
The sequence at Spike S1/S2 site enables cleavage by furin and phospho-regulation in SARS-CoV2 but not in SARS-CoV1 or MERS-CoV.
Dual proteome-scale networks reveal cell-specific remodeling of the human interactome.
A protein interaction landscape of breast cancer.
Mitotic chromosome condensation requires phosphorylation of the centromeric protein KNL-2 in C. elegans.
CDK1/FBXW7 facilitates degradation and ubiquitination of MLST8 to inhibit progression of renal cell carcinoma.
OpenCell: Endogenous tagging for the cartography of human cellular organization.
ATR promotes clearance of damaged DNA and damaged cells by rupturing micronuclei.
ASB7 is a negative regulator of H3K9me3 homeostasis.
ERF: an ETS domain protein with strong transcriptional repressor activity, can suppress ets-associated tumorigenesis and is regulated by phosphorylation during cell cycle and mitogenic stimulation.
Novel INK4 proteins, p19 and p18, are specific inhibitors of the cyclin D-dependent kinases CDK4 and CDK6.
Simian virus 40 large T antigen affects the Saccharomyces cerevisiae cell cycle and interacts with p34CDC28.
The human Myt1 kinase preferentially phosphorylates Cdc2 on threonine 14 and localizes to the endoplasmic reticulum and Golgi complex.
Human homologue of the Drosophila melanogaster lats tumour suppressor modulates CDC2 activity.
Reactome:R-HSA-110056
MAPK3 (ERK1) activation
Reactome:R-HSA-112342
Inactivation of MAP2K1 by CDK1
Reactome:R-HSA-170044
Translocation of Cyclin B1:phospho-Cdc2 complexes to the nucleus
Reactome:R-HSA-170055
Myt-1 mediated phosphorylation of Cyclin B:Cdc2 complexes
Reactome:R-HSA-170057
Formation of Cyclin B:Cdc2 complexes
Reactome:R-HSA-170070
Wee1-mediated phosphorylation of Cyclin B1:phospho-Cdc2 complexes
Reactome:R-HSA-170072
Translocation of Cyclin B1:phospho-Cdc2 to the cytoplasm
Reactome:R-HSA-170076
CAK phosphorylates CDK1 bound to CCNB1
Reactome:R-HSA-170087
CAK phosphorylates CDK1 bound to CCNA
Reactome:R-HSA-170088
Translocation of CCNA:p-T14-CDK1 to the nucleus
Reactome:R-HSA-170116
PKMYT1 phosphorylates CCNA:CDK1
Reactome:R-HSA-170126
Phosphorylation of Cyclin B1 in the CRS domain
Reactome:R-HSA-170131
Translocation of CRS phosphorylated Cyclin B1:Cdc2 complexes
Reactome:R-HSA-170153
Dephosphorylation of nuclear Cyclin B1:phospho-Cdc2 (Thr 14, Tyr15) complexes by Cdc25 phosphatases
Reactome:R-HSA-170156
WEE1 phosphorylates CCNA:CDK1
Reactome:R-HSA-170158
CDC25A dephosphorylates CCNA:CDK1
Reactome:R-HSA-170161
Dephosphorylation of cytoplasmic Cyclin B1/B2:phospho-Cdc2 (Thr 14, Tyr 15) complexes by CDC25B
Reactome:R-HSA-174104
Ubiquitination of Cyclin A by APC/C:Cdc20 complex
Reactome:R-HSA-174120
Association of Cyclin B:Cdc2 with Cdc20:APC/C complex
Reactome:R-HSA-174122
Phosphorylation of the Emi1 DSGxxS degron by Cyclin B:Cdc2
Reactome:R-HSA-174132
Free APC/C phosphorylated by Cyclin B:Cdc2
Reactome:R-HSA-174157
Degradation of multiubiquitinated Cyclin B
Reactome:R-HSA-174171
Association of Cyclin A with the APC/C
Reactome:R-HSA-174227
Ubiquitination of Cyclin B by phospho-APC/C:Cdc20 complex
Reactome:R-HSA-174251
Phosphorylation of Cdh1 by Cyclin B1:Cdc2
Reactome:R-HSA-174255
Degradation multiubiquitinated Cyclin A
Reactome:R-HSA-2245218
CDK1 phosphorylates PHF8
Reactome:R-HSA-2294600
CDK1 phosphorylates condensin II subunit NCAPD3
Reactome:R-HSA-2468287
CDK1 phosphorylates CDCA5 (Sororin) at centromeres
Reactome:R-HSA-2468293
CDK1 phosphorylates CDCA5 (Sororin) at chromosomal arms
Reactome:R-HSA-2574840
AJUBA facilitates AURKA autophosphorylation
Reactome:R-HSA-2574845
AJUBA binds centrosome-associated AURKA
Reactome:R-HSA-2984220
CDK1:CCNB phosphorylates NEK9
Reactome:R-HSA-2990882
CDK1 phosphorylates NUP98
Reactome:R-HSA-3000310
AURKA phosphorylates PLK1
Reactome:R-HSA-3000319
BORA binds PLK1 and AURKA
Reactome:R-HSA-380272
Plk1-mediated phosphorylation of Nlp
Reactome:R-HSA-380278
CCNB1:p-T160-CDK1 phosphorylates NUMA1
Reactome:R-HSA-380283
Recruitment of additional gamma tubulin/ gamma TuRC to the centrosome
Reactome:R-HSA-380294
Loss of C-Nap-1 from centrosomes
Reactome:R-HSA-380303
Dissociation of Phospho-Nlp from the centrosome
Reactome:R-HSA-380311
Recruitment of Plk1 to centrosomes
Reactome:R-HSA-380316
Association of NuMA with microtubules
Reactome:R-HSA-380455
Recruitment of CDK11p58 to the centrosomes
Reactome:R-HSA-380508
Translocation of NuMA to the centrosomes
Reactome:R-HSA-4086410
CCNB:CDK1 phosphorylates BORA
Reactome:R-HSA-4088024
CCNA:CDK1/2 complexes and CCNB1:CDK1 complexes phosphorylate FOXM1
Reactome:R-HSA-5195402
CDK1 phosphorylates LPIN
Reactome:R-HSA-5244669
CDK1 phosphorylates lamins and facilitates depolymerization of lamin filaments
Reactome:R-HSA-5617816
RAB3IP stimulates nucleotide exchange on RAB8A
Reactome:R-HSA-5626220
C2CD3 binds the mother centriole
Reactome:R-HSA-5626223
C2CD3 and OFD1 recruit 5 distal appendage proteins to the centriole
Reactome:R-HSA-5626227
CP110 and CEP97 dissociate from the centriole
Reactome:R-HSA-5626228
The distal appendage proteins recruit TTBK2
Reactome:R-HSA-5626681
Recruitment of transition zone proteins
Reactome:R-HSA-5626699
MARK4 binds ODF2 in the centriole
Reactome:R-HSA-5638009
CEP164 recruits RAB3IP-carrying Golgi-derived vesicles to the basal body
Reactome:R-HSA-5688426
Deubiquitination
Reactome:R-HSA-5692755
CDK1 phosphorylates MAPK6
Reactome:R-HSA-6793661
(CDK1,CDK2):CCNA phosphorylates MDM2 at T218
Reactome:R-HSA-6803875
SFN dimer binds CDK1 and CCNB1
Reactome:R-HSA-69275
G2/M Transition
Reactome:R-HSA-8853405
TPX2 binds AURKA at centrosomes
Reactome:R-HSA-8853419
TPX2 promotes AURKA autophosphorylation
Reactome:R-HSA-8940100
CDK1 phosphorylates VCPIP1
Reactome:R-HSA-9009282
CDK1 phosphorylates RUNX2
Reactome:R-HSA-9624800
CDK1 phosphorylates LBR
Reactome:R-HSA-9836184
p-PKR dimer phosphorylates CDK1
Reactome:R-HSA-9928875
Formation of CCNA1:CDK1 complex
Reactome:R-HSA-9928887
Formation of CCNA2:CDK1 complex
Reactome:R-HSA-9929514
CDK1 phosphorylates CCNA
Reactome:R-HSA-9929532
CCNA:CDK1 phosphorylates BORA
Reactome:R-HSA-9929533
CCNA:CDK1 complex translocates to the cytosol
Reactome:R-HSA-9929535
CCNA:CDK1 phosphorylates WEE1
Reactome:R-HSA-9929717
CCNA:CDK1 phosphorylates FZR1
Reactome:R-HSA-9929719
CCNA:CDK1 phosphorylates TICRR
Reactome:R-HSA-9929720
CCNA:CDK1 phosphorylates OBI1
Reactome:R-HSA-9929721
CCNA:CDK1 phosphorylates SGO1
Reactome:R-HSA-9929884
CCNA:CDK1 phosphorylates HJURP
Reactome:R-HSA-9929904
CCNA:CDK1 phosphorylates MIS18BP1
Reactome:R-HSA-9929935
CCNA:CDK1 phosphorylates CDC25B
Reactome:R-NUL-2422970
Phosphorylation of Gorasp1, Golga2 and RAB1A by CDK1:CCNB
Reactome:R-NUL-2434198
CDK1 phosphorylates Mastl
file:human/CDK1/CDK1-deep-research-falcon.md
Deep research report on CDK1

Suggested Questions for Experts

Q: Should CDK1 be annotated to apoptotic process given that it phosphorylates survivin and other apoptosis regulators? Review consensus is NO - this is over-annotation. CDK1 phosphorylates over 1000 substrates as part of its cell cycle function. Phosphorylating apoptosis regulators to maintain cell viability during division is not the same as having apoptosis as an evolved function.

Q: How should the extensive Reactome pathway annotations resulting in many duplicate localization terms be handled? Multiple Reactome pathway references for the same localization term create redundancy but add evidence.

πŸ“š Additional Documentation

Deep Research Falcon

(CDK1-deep-research-falcon.md)

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gene_id: CDK1
gene_symbol: CDK1
uniprot_accession: P06493
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{ECO:0000269|PubMed:2188730, ECO:0000269|PubMed:23355470, ECO:0000269|PubMed:2344612,
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AltName: Full=Cell division control protein 2 homolog; AltName: Full=Cell division
protein kinase 1; AltName: Full=p34 protein kinase;'
gene_info: Name=CDK1; Synonyms=CDC2, CDC28A, CDKN1, P34CDC2;
organism_full: Homo sapiens (Human).
protein_family: Belongs to the protein kinase superfamily. CMGC Ser/Thr
protein_domains: CDK. (IPR050108); Kinase-like_dom_sf. (IPR011009); Prot_kinase_dom.
(IPR000719); Protein_kinase_ATP_BS. (IPR017441); Ser/Thr_kinase_AS. (IPR008271)
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Question

Gene Research for Functional Annotation

⚠️ CRITICAL: Gene/Protein Identification Context

BEFORE YOU BEGIN RESEARCH: You MUST verify you are researching the CORRECT gene/protein. Gene symbols can be ambiguous, especially for less well-characterized genes from non-model organisms.

Target Gene/Protein Identity (from UniProt):

  • UniProt Accession: P06493
  • Protein Description: RecName: Full=Cyclin-dependent kinase 1; Short=CDK1; EC=2.7.11.22 {ECO:0000269|PubMed:2188730, ECO:0000269|PubMed:23355470, ECO:0000269|PubMed:2344612, ECO:0000269|PubMed:26829474, ECO:0000269|PubMed:30704899}; EC=2.7.11.23 {ECO:0000250|UniProtKB:P11440}; AltName: Full=Cell division control protein 2 homolog; AltName: Full=Cell division protein kinase 1; AltName: Full=p34 protein kinase;
  • Gene Information: Name=CDK1; Synonyms=CDC2, CDC28A, CDKN1, P34CDC2;
  • Organism (full): Homo sapiens (Human).
  • Protein Family: Belongs to the protein kinase superfamily. CMGC Ser/Thr
  • Key Domains: CDK. (IPR050108); Kinase-like_dom_sf. (IPR011009); Prot_kinase_dom. (IPR000719); Protein_kinase_ATP_BS. (IPR017441); Ser/Thr_kinase_AS. (IPR008271)

MANDATORY VERIFICATION STEPS:

  1. Check if the gene symbol "CDK1" matches the protein description above
  2. Verify the organism is correct: Homo sapiens (Human).
  3. Check if protein family/domains align with what you find in literature
  4. If you find literature for a DIFFERENT gene with the same or similar symbol, STOP

If Gene Symbol is Ambiguous or You Cannot Find Relevant Literature:

DO NOT PROCEED WITH RESEARCH ON A DIFFERENT GENE. Instead:
- State clearly: "The gene symbol 'CDK1' is ambiguous or literature is limited for this specific protein"
- Explain what you found (e.g., "Found extensive literature on a different gene with the same symbol in a different organism")
- Describe the protein based ONLY on the UniProt information provided above
- Suggest that the protein function can be inferred from domain/family information

Research Target:

Please provide a comprehensive research report on the gene CDK1 (gene ID: CDK1, UniProt: P06493) in human.

The research report should be a detailed narrative explaining the function, biological processes, and localization of the gene product. Citations should be given for all claims.

You should prioritize authoritative reviews and primary scientific literature when conducting research. You can supplement
this with annotations you find in gene/protein databases, but these can be outdated or inaccurate.

We are specifically interested in the primary function of the gene - for enzymes, what reaction is catalyzed, and what is the substrate specificity? For transporters, what is the substrate? For structural proteins or adapters, what is the broader structural role? For signaling molecules, what is the role in the pathway.

We are interested in where in or outside the cell the gene product carries out its function.

We are also interested in the signaling or biochemical pathways in which the gene functions. We are less interested in broad pleiotropic effects, except where these elucidate the precise role.

Include evidence where possible. We are interested in both experimental evidence as well as inference from structure, evolution, or bioinformatic analysis. Precise studies should be prioritized over high-throughput, where available.

Output

Question: You are an expert researcher providing comprehensive, well-cited information.

Provide detailed information focusing on:
1. Key concepts and definitions with current understanding
2. Recent developments and latest research (prioritize 2023-2024 sources)
3. Current applications and real-world implementations
4. Expert opinions and analysis from authoritative sources
5. Relevant statistics and data from recent studies

Format as a comprehensive research report with proper citations. Include URLs and publication dates where available.
Always prioritize recent, authoritative sources and provide specific citations for all major claims.

Gene Research for Functional Annotation

⚠️ CRITICAL: Gene/Protein Identification Context

BEFORE YOU BEGIN RESEARCH: You MUST verify you are researching the CORRECT gene/protein. Gene symbols can be ambiguous, especially for less well-characterized genes from non-model organisms.

Target Gene/Protein Identity (from UniProt):

  • UniProt Accession: P06493
  • Protein Description: RecName: Full=Cyclin-dependent kinase 1; Short=CDK1; EC=2.7.11.22 {ECO:0000269|PubMed:2188730, ECO:0000269|PubMed:23355470, ECO:0000269|PubMed:2344612, ECO:0000269|PubMed:26829474, ECO:0000269|PubMed:30704899}; EC=2.7.11.23 {ECO:0000250|UniProtKB:P11440}; AltName: Full=Cell division control protein 2 homolog; AltName: Full=Cell division protein kinase 1; AltName: Full=p34 protein kinase;
  • Gene Information: Name=CDK1; Synonyms=CDC2, CDC28A, CDKN1, P34CDC2;
  • Organism (full): Homo sapiens (Human).
  • Protein Family: Belongs to the protein kinase superfamily. CMGC Ser/Thr
  • Key Domains: CDK. (IPR050108); Kinase-like_dom_sf. (IPR011009); Prot_kinase_dom. (IPR000719); Protein_kinase_ATP_BS. (IPR017441); Ser/Thr_kinase_AS. (IPR008271)

MANDATORY VERIFICATION STEPS:

  1. Check if the gene symbol "CDK1" matches the protein description above
  2. Verify the organism is correct: Homo sapiens (Human).
  3. Check if protein family/domains align with what you find in literature
  4. If you find literature for a DIFFERENT gene with the same or similar symbol, STOP

If Gene Symbol is Ambiguous or You Cannot Find Relevant Literature:

DO NOT PROCEED WITH RESEARCH ON A DIFFERENT GENE. Instead:
- State clearly: "The gene symbol 'CDK1' is ambiguous or literature is limited for this specific protein"
- Explain what you found (e.g., "Found extensive literature on a different gene with the same symbol in a different organism")
- Describe the protein based ONLY on the UniProt information provided above
- Suggest that the protein function can be inferred from domain/family information

Research Target:

Please provide a comprehensive research report on the gene CDK1 (gene ID: CDK1, UniProt: P06493) in human.

The research report should be a detailed narrative explaining the function, biological processes, and localization of the gene product. Citations should be given for all claims.

You should prioritize authoritative reviews and primary scientific literature when conducting research. You can supplement
this with annotations you find in gene/protein databases, but these can be outdated or inaccurate.

We are specifically interested in the primary function of the gene - for enzymes, what reaction is catalyzed, and what is the substrate specificity? For transporters, what is the substrate? For structural proteins or adapters, what is the broader structural role? For signaling molecules, what is the role in the pathway.

We are interested in where in or outside the cell the gene product carries out its function.

We are also interested in the signaling or biochemical pathways in which the gene functions. We are less interested in broad pleiotropic effects, except where these elucidate the precise role.

Include evidence where possible. We are interested in both experimental evidence as well as inference from structure, evolution, or bioinformatic analysis. Precise studies should be prioritized over high-throughput, where available.

Plan and verification
- Verified identity: Human CDK1 (cyclin-dependent kinase 1), UniProt P06493, CMGC family serine/threonine protein kinase with canonical protein kinase domain; literature and structures confirm human CDK1 in complexes with cyclin B and CKS proteins (Brown 2015) (brown2015cdk1structuresreveal pages 1-2). Organism and family/domain assignment align with the provided UniProt context (brown2015cdk1structuresreveal pages 1-2).
- Evidence strategy: Emphasize recent peer‑reviewed reviews and structural/cell‑cycle analyses (2023–2024 emphasis where available), focusing on: enzymatic function and motifs; activation/inhibition circuitry; cyclin partners and localization; pathway context; non‑mitotic roles; and translational applications.

Human CDK1: key concepts and definitions
- Enzymatic class and essential role: CDK1 is a conserved serine/threonine protein kinase (EC 2.7.11.22/23) that is the only CDK essential for mammalian cell-cycle progression; it drives the G2β†’M transition and M‑phase processes (Brown 2015; Massacci 2023) (brown2015cdk1structuresreveal pages 1-2, massacci2023thecyclindependentkinase pages 1-2).
- Substrate specificity and motifs: CDK1 typically phosphorylates S/T‑P motifs. Substrate selection is refined by cyclin docking interfaces and the CKS subunit, which promotes priming/multisite phosphorylation and processivity on CDK substrates (Brown 2015; Massacci 2023) (brown2015cdk1structuresreveal pages 1-2, massacci2023thecyclindependentkinase pages 1-2).
- Activation and inhibition logic: The catalytic activation segment T161 must be phosphorylated by the CDK‑activating kinase (CAK, CDK7–cyclin H), while T14 and Y15 are inhibitory sites set by WEE1/PKMYT1 and removed by CDC25 phosphatases (CDC25A/B/C) to trigger the switch into mitosis (Lemonnier 2020; Massacci 2023; Wang 2023) (lemonnier2020theg2tomtransition pages 1-2, massacci2023thecyclindependentkinase pages 1-2, wang2023targetingcdk1in pages 1-2).
- Cyclin partners and cofactors: The principal mitotic partner is cyclin B1 (also cyclin A can bind in some contexts). CKS1/2 act as phospho‑adaptors that dock to primed sites and facilitate multi‑site substrate phosphorylation, shaping timing and ordering of mitotic events (Brown 2015; Massacci 2023) (brown2015cdk1structuresreveal pages 1-2, massacci2023thecyclindependentkinase pages 1-2).
- Localization and timing: CDK1–cyclin complexes distribute between cytoplasm and nucleus. At mitotic entry, activation is detected at centrosomes and then across nuclear/kinetochore/spindle compartments around nuclear envelope breakdown (NEBD), coordinating mitotic onset (Brown 2015; Lemonnier 2020; Massacci 2023) (brown2015cdk1structuresreveal pages 1-2, lemonnier2020theg2tomtransition pages 1-2, massacci2023thecyclindependentkinase pages 1-2).
- Pathway context: CDK1 sits within a bistable β€œG2/M switch” governed by PLK1 (promotes Cdc25, inhibits Wee1), and by the Greatwall–PP2A‑B55 phosphatase axis that times dephosphorylation versus phosphorylation waves. Mitotic exit proceeds as APC/C activation and phosphatase reactivation reverse CDK1‑driven phosphorylation (Lemonnier 2020; Brown 2015; Massacci 2023) (lemonnier2020theg2tomtransition pages 1-2, brown2015cdk1structuresreveal pages 1-2, massacci2023thecyclindependentkinase pages 1-2).

Recent developments and latest research (emphasis 2023–2024)
- Comprehensive 2023 synthesis of non‑mitotic roles: A 2023 British Journal of Cancer review catalogues CDK1’s roles beyond mitosisβ€”transcriptional control, mitochondrial metabolism (e.g., Drp1 fission; Complex I and SIRT3 regulation), apoptosis (caspase-9, Bcl‑2 family, survivin), Golgi remodeling, endocytosis and nucleocytoplasmic transportβ€”expanding the β€œCDK1 substratome” and cancer‑relevance of these functions (Massacci 2023) (massacci2023thecyclindependentkinase pages 3-4, massacci2023thecyclindependentkinase pages 1-2, massacci2023thecyclindependentkinase pages 7-9).
- Structural basis and selectivity levers: Human CDK1–cyclin B–CKS complexes reveal differences versus CDK2 that affect stability, activation‑segment control and substrate sequence preferences; such differences are potential avenues for CDK1‑selective inhibitor design (Brown 2015) (brown2015cdk1structuresreveal pages 1-2).
- Phosphatase‑centric view of the mitotic switch: Recent conceptual advances synthesize how Greatwall–PP2A‑B55, Cdc25 and Wee1/Myt1 orchestrate the irreversible G2β†’M transition and timing through sequential dephosphorylationsβ€”highlighting phosphatases as equally central as kinases for mitotic control (Lemonnier 2020) (lemonnier2020theg2tomtransition pages 1-2).
- Oncogenic regulation via Tyr15 and resistance: Phosphoproteomic and signaling analyses link CDK1 Tyr15 phosphorylation to drug resistance circuitry (e.g., ERBB2/SRC/BRK) and show cancer‑type–specific activation states; CDK1 is transcriptionally/proteomically upregulated across many tumors (Massacci 2023) (massacci2023thecyclindependentkinase pages 7-9).

Current applications and real‑world implementations
- Therapeutic positioning and inhibitors: CDK1 is widely overexpressed in tumors and is a prioritized target; however, first‑generation pan‑CDK inhibitors suffered from toxicity. Newer strategies include more selective CDK1 tool compounds (e.g., RO‑3306), combination regimens, and targeting upstream gatekeepers (WEE1/PKMYT1) to modulate the CDK1 switch and radiosensitize or chemosensitize tumors (Wang 2023; Massacci 2023) (wang2023targetingcdk1in pages 1-2, massacci2023thecyclindependentkinase pages 9-9).
- Biomarker and resistance context: Analyses across The Cancer Genome Atlas show CDK1 expression elevation in roughly 71% (17/24) of cancer types examined, consistent with proliferative state and poor outcomes; inhibitory Y15 phosphorylation circuitry can contribute to resistance to taxanes and kinase inhibitors, suggesting actionable biomarkers and combination partners (Wang 2023; Massacci 2023) (wang2023targetingcdk1in pages 1-2, massacci2023thecyclindependentkinase pages 7-9).

Expert opinions and analysis from authoritative sources
- Brown 2015 (Nature Communications): CDK1 is uniquely essential; structures of CDK1 with cyclin B and CKS define conserved activation principles and unique features differentiating it from CDK2, with implications for substrate recognition and inhibitor selectivity (brown2015cdk1structuresreveal pages 1-2).
- Lemonnier 2020 (Cell Division): Emphasizes phosphatase control (PP2A‑B55, Cdc25) as the counterweight to kinase networks in G2β†’M, explaining robustness and irreversibility of mitotic entry (lemonnier2020theg2tomtransition pages 1-2).
- Massacci 2023 (British Journal of Cancer): Integrates curated substrates and upstream regulators, argues for broad non‑mitotic functions of CDK1 in cancer biology, and frames therapeutic opportunities and open questions (massacci2023thecyclindependentkinase pages 1-2, massacci2023thecyclindependentkinase pages 3-4, massacci2023thecyclindependentkinase pages 6-7, massacci2023thecyclindependentkinase pages 7-9).
- Wang 2023 (NPJ Precision Oncology): Reviews targeting CDK1 in cancer, summarizing regulatory mechanisms, expression patterns across cancers, and development status of direct and indirect (checkpoint‑level) inhibitors (wang2023targetingcdk1in pages 1-2).

Relevant statistics and data from recent studies
- Tumor overexpression prevalence: Across large cancer datasets, CDK1 expression is elevated in about 70.8% (17/24) of cancer types, reinforcing its translational relevance as a target and biomarker (Wang 2023) (wang2023targetingcdk1in pages 1-2).
- Substrate landscape: Contemporary curation collates many direct human CDK1 substrates across mitotic and non‑mitotic processes, with site‑ and outcome‑level annotations (activation vs inhibition), providing a reference β€œsubstratome” for hypothesis generation (Massacci 2023) (massacci2023thecyclindependentkinase pages 6-7).
- Resistance circuitry: Cancer‑type–specific modulation of CDK1 activation state (e.g., Tyr15) correlates with drug resistance mechanisms, including ERBB2/SRC/BRK signaling, informing combination therapy design (Massacci 2023) (massacci2023thecyclindependentkinase pages 7-9).

Key substrates and cellular localizations (selected examples)
- Mitotic machinery and cytoskeleton: CDK1 phosphorylates numerous spindle, kinetochore, and microtubule‑associated proteins (e.g., KIF11/EG5, BUB1B, MAP4, intermediate filaments such as vimentin and lamin A), coordinating chromosome segregation and cell morphology changes; localization includes centrosomes, nucleus, kinetochores and spindle during M‑phase (Brown 2015; Massacci 2023) (brown2015cdk1structuresreveal pages 1-2, massacci2023thecyclindependentkinase pages 6-7).
- Transcription, metabolism and organelles: Curated substrates include regulators of transcription/translation and mitochondrial and Golgi proteins (e.g., Drp1/mitochondrial fission; GRASP65/GM130 for Golgi remodeling), highlighting non‑mitotic localization and functions (Massacci 2023) (massacci2023thecyclindependentkinase pages 3-4, massacci2023thecyclindependentkinase pages 7-9).

Embedded summary artifact
| Section | Topic / Area | Key facts / 2023–24 highlight | Primary sources (label, year) |
|---|---|---|---|
| Core biology | Enzymatic class (EC) | Ser/Thr protein kinase (CDK family). Catalytic activity annotated as EC 2.7.11.22/23 and essential for M-phase progression. | Brown 2015; Massacci 2023 (brown2015cdk1structuresreveal pages 1-2, massacci2023thecyclindependentkinase pages 1-2) |
| Core biology | Consensus motifs & docking | Prefers S/T-P motifs; substrate specificity enhanced by cyclin docking sites and CKS-mediated priming/multisite phosphorylation. | Brown 2015; Massacci 2023 (brown2015cdk1structuresreveal pages 1-2, massacci2023thecyclindependentkinase pages 1-2) |
| Core biology | Activation / inhibition sites & regulators | Activating phosphorylation: Thr161 by CAK (CDK7–cyclin H). Inhibitory phosphorylations: Thr14 and Tyr15 by WEE1/PKMYT1; removed by CDC25 phosphatases to activate CDK1. | Lemonnier 2020; Massacci 2023; Wang 2023 (lemonnier2020theg2tomtransition pages 1-2, massacci2023thecyclindependentkinase pages 1-2, wang2023targetingcdk1in pages 1-2) |
| Core biology | Cyclin partners & CKS roles | Principal mitotic partner: cyclin B1; cyclin A can also pair. CKS1/2 act as phospho-adaptors to promote multisite phosphorylation and substrate recruitment. | Brown 2015; Massacci 2023 (brown2015cdk1structuresreveal pages 1-2, massacci2023thecyclindependentkinase pages 1-2) |
| Core biology | Localization dynamics & timing | CDK1–cyclin complexes traffic between nucleus and cytoplasm; activity/local activation detected at centrosomes, then nucleus/kinetochores and spindle during G2β†’M and around NEBD. | Brown 2015; Lemonnier 2020; Massacci 2023 (brown2015cdk1structuresreveal pages 1-2, lemonnier2020theg2tomtransition pages 1-2, massacci2023thecyclindependentkinase pages 1-2) |
| Core biology | Pathway context (mitotic switch & exit) | Interacts with PLK1-driven activation cascade, Greatwall–PP2A‑B55 controls substrate dephosphorylation timing, and APC/C–separase axis effects mitotic exit downstream of CDK1 inactivation. | Lemonnier 2020; Brown 2015; Massacci 2023 (lemonnier2020theg2tomtransition pages 1-2, brown2015cdk1structuresreveal pages 1-2, massacci2023thecyclindependentkinase pages 1-2) |
| Updates & applications | Non-mitotic roles (2023 review) | 2023 synthesis highlights CDK1 roles in transcription, metabolism, mitochondrial dynamics and apoptosis beyond classical cell-cycle control. | Massacci 2023 (massacci2023thecyclindependentkinase pages 1-2) |
| Updates & applications | Therapeutic targeting (oncology) | 2023 NPJ review positions CDK1 as a cancer-relevant target; many tumors show CDK1 upregulation and strategies include direct inhibitors or targeting upstream regulators (e.g., WEE1). | Wang 2023; Massacci 2023 (wang2023targetingcdk1in pages 1-2, massacci2023thecyclindependentkinase pages 1-2) |
| Updates & applications | Structural insights (implications for inhibitors) | High-resolution CDK1–cyclin/CKS structures reveal conserved and unique features that could enable selective inhibitor design and explain substrate specificity. | Brown 2015 (brown2015cdk1structuresreveal pages 1-2) |
| Updates & applications | Phosphatase & timing advances | Reviews emphasize the Greatwall–PP2A‑B55 and Cdc25/WEE1 circuits as the molecular switch controlling irreversible G2β†’M transition, informing targets like WEE1. | Lemonnier 2020; Massacci 2023 (lemonnier2020theg2tomtransition pages 1-2, massacci2023thecyclindependentkinase pages 1-2) |
| Updates & applications | Substrate maps & phosphoproteomics | 2023 curation compiles an extensive CDK1 substratome (many residues/sites); quantitative maps aid prioritizing functional substrates in mitosis and disease. | Massacci 2023 (massacci2023thecyclindependentkinase pages 6-7, massacci2023thecyclindependentkinase pages 7-9) |
| Updates & applications | Inhibitor landscape & strategies | Historic pan‑CDK inhibitors had toxicity; selective tools (e.g., RO‑3306) and approaches targeting upstream kinases (WEE1/PKMYT1) or combination regimens are current translational focuses. | Massacci 2023; Wang 2023 (massacci2023thecyclindependentkinase pages 9-9, wang2023targetingcdk1in pages 1-2) |
| Updates & applications | Emerging extramitotic roles & metabolism | Emerging evidence (reviewed 2023) links basal/extramitotic CDK1 activity to metabolic and signalling regulation, suggesting contexts beyond dividing cells for therapeutic consideration. | Massacci 2023; Wang 2023 (massacci2023thecyclindependentkinase pages 1-2, wang2023targetingcdk1in pages 1-2) |

Table: A concise two‑section table summarizing core biology of human CDK1 (P06493) and key 2023–2024 advances/applications, with primary source labels and context citations for each item.

Conclusions
Human CDK1 (P06493) is the essential mitotic CDK that integrates cyclin docking, CKS‑facilitated multisite phosphorylation, and phosphoregulation at T161/T14/Y15 to control the abrupt, robust G2β†’M transition. Recent work emphasizes the equal importance of phosphatase networks (Greatwall–PP2A‑B55), and expands CDK1 biology beyond mitosis to transcription, metabolism, membrane trafficking, and apoptosis. In oncology, CDK1 is frequently upregulated and functionally implicated in resistance circuitry; translational strategies include direct inhibition and modulation of upstream checkpoint kinases (e.g., WEE1), often in rational combinations. Structural distinctions from CDK2 and curated, site‑resolved substrate maps now provide concrete levers for designing selective inhibitors and for prioritizing actionable substrates in disease contexts (brown2015cdk1structuresreveal pages 1-2, lemonnier2020theg2tomtransition pages 1-2, massacci2023thecyclindependentkinase pages 1-2, wang2023targetingcdk1in pages 1-2).

Source URLs and publication dates
- Brown NR et al. CDK1 structures reveal conserved and unique features. Nature Communications. 2015-04-23. URL: https://doi.org/10.1038/ncomms7769 (brown2015cdk1structuresreveal pages 1-2)
- Lemonnier T et al. The G2-to-M transition from a phosphatase perspective. Cell Division. 2020-05-27. URL: https://doi.org/10.1186/s13008-020-00065-2 (lemonnier2020theg2tomtransition pages 1-2)
- Massacci G et al. The Cyclin-dependent kinase 1: more than a cell cycle regulator. Br J Cancer. 2023-10-30. URL: https://doi.org/10.1038/s41416-023-02468-8 (massacci2023thecyclindependentkinase pages 1-2, massacci2023thecyclindependentkinase pages 3-4, massacci2023thecyclindependentkinase pages 6-7, massacci2023thecyclindependentkinase pages 7-9)
- Wang Q et al. Targeting CDK1 in cancer: mechanisms and implications. NPJ Precision Oncology. 2023-06-02. URL: https://doi.org/10.1038/s41698-023-00407-7 (wang2023targetingcdk1in pages 1-2)

References

  1. (brown2015cdk1structuresreveal pages 1-2): Nicholas R. Brown, Svitlana Korolchuk, Mathew P. Martin, Will A. Stanley, Rouslan Moukhametzianov, Martin E. M. Noble, and Jane A. Endicott. Cdk1 structures reveal conserved and unique features of the essential cell cycle cdk. Nature Communications, Apr 2015. URL: https://doi.org/10.1038/ncomms7769, doi:10.1038/ncomms7769. This article has 244 citations and is from a highest quality peer-reviewed journal.

  2. (massacci2023thecyclindependentkinase pages 1-2): Giorgia Massacci, Livia Perfetto, and Francesca Sacco. The cyclin-dependent kinase 1: more than a cell cycle regulator. British Journal of Cancer, 129:1707-1716, Oct 2023. URL: https://doi.org/10.1038/s41416-023-02468-8, doi:10.1038/s41416-023-02468-8. This article has 108 citations and is from a domain leading peer-reviewed journal.

  3. (lemonnier2020theg2tomtransition pages 1-2): Tom Lemonnier, Aude DuprΓ©, and Catherine Jessus. The g2-to-m transition from a phosphatase perspective: a new vision of the meiotic division. Cell Division, May 2020. URL: https://doi.org/10.1186/s13008-020-00065-2, doi:10.1186/s13008-020-00065-2. This article has 40 citations and is from a peer-reviewed journal.

  4. (wang2023targetingcdk1in pages 1-2): Qiushi Wang, Ann M. Bode, and Tianshun Zhang. Targeting cdk1 in cancer: mechanisms and implications. NPJ Precision Oncology, Jun 2023. URL: https://doi.org/10.1038/s41698-023-00407-7, doi:10.1038/s41698-023-00407-7. This article has 164 citations and is from a peer-reviewed journal.

  5. (massacci2023thecyclindependentkinase pages 3-4): Giorgia Massacci, Livia Perfetto, and Francesca Sacco. The cyclin-dependent kinase 1: more than a cell cycle regulator. British Journal of Cancer, 129:1707-1716, Oct 2023. URL: https://doi.org/10.1038/s41416-023-02468-8, doi:10.1038/s41416-023-02468-8. This article has 108 citations and is from a domain leading peer-reviewed journal.

  6. (massacci2023thecyclindependentkinase pages 7-9): Giorgia Massacci, Livia Perfetto, and Francesca Sacco. The cyclin-dependent kinase 1: more than a cell cycle regulator. British Journal of Cancer, 129:1707-1716, Oct 2023. URL: https://doi.org/10.1038/s41416-023-02468-8, doi:10.1038/s41416-023-02468-8. This article has 108 citations and is from a domain leading peer-reviewed journal.

  7. (massacci2023thecyclindependentkinase pages 9-9): Giorgia Massacci, Livia Perfetto, and Francesca Sacco. The cyclin-dependent kinase 1: more than a cell cycle regulator. British Journal of Cancer, 129:1707-1716, Oct 2023. URL: https://doi.org/10.1038/s41416-023-02468-8, doi:10.1038/s41416-023-02468-8. This article has 108 citations and is from a domain leading peer-reviewed journal.

  8. (massacci2023thecyclindependentkinase pages 6-7): Giorgia Massacci, Livia Perfetto, and Francesca Sacco. The cyclin-dependent kinase 1: more than a cell cycle regulator. British Journal of Cancer, 129:1707-1716, Oct 2023. URL: https://doi.org/10.1038/s41416-023-02468-8, doi:10.1038/s41416-023-02468-8. This article has 108 citations and is from a domain leading peer-reviewed journal.

Citations

  1. massacci2023thecyclindependentkinase pages 7-9
  2. massacci2023thecyclindependentkinase pages 6-7
  3. massacci2023thecyclindependentkinase pages 1-2
  4. massacci2023thecyclindependentkinase pages 3-4
  5. massacci2023thecyclindependentkinase pages 9-9
  6. https://doi.org/10.1038/ncomms7769
  7. https://doi.org/10.1186/s13008-020-00065-2
  8. https://doi.org/10.1038/s41416-023-02468-8
  9. https://doi.org/10.1038/s41698-023-00407-7
  10. https://doi.org/10.1038/ncomms7769,
  11. https://doi.org/10.1038/s41416-023-02468-8,
  12. https://doi.org/10.1186/s13008-020-00065-2,
  13. https://doi.org/10.1038/s41698-023-00407-7,

πŸ“„ View Raw YAML

id: P06493
gene_symbol: CDK1
product_type: PROTEIN
status: COMPLETE
taxon:
  id: NCBITaxon:9606
  label: Homo sapiens
description: Cyclin-dependent kinase 1 (CDK1, also known as CDC2/p34cdc2) is the
  essential and universally conserved serine/threonine kinase that drives the 
  G2/M transition and mitotic progression in all eukaryotes. CDK1 is unique 
  among CDKs in being absolutely required for cell division in mammals. The 
  active holoenzyme consists of CDK1 bound to cyclin B1 (principally) or cyclin 
  A, with CKS1/2 serving as phospho-adaptors that promote multisite substrate 
  phosphorylation. CDK1 activity is tightly regulated through activating 
  phosphorylation at Thr161 by CAK (CDK7-cyclin H) and inhibitory 
  phosphorylation at Thr14 and Tyr15 by WEE1 and PKMYT1, which is reversed by 
  CDC25 phosphatases at mitotic entry. CDK1 phosphorylates substrates on S/T-P 
  motifs and has over 1000 documented substrates, including lamins (nuclear 
  envelope breakdown), condensins (chromosome condensation), and numerous 
  mitotic machinery proteins. As a master regulator of cell division, CDK1 has 
  been documented to phosphorylate many proteins involved in diverse processes 
  beyond mitosis (transcription, metabolism, organelle dynamics), but its core 
  evolved function is as the essential mitotic kinase
alternative_products:
  - name: '1'
    id: P06493-1
  - name: 2 (CDC2deltaT)
    id: P06493-2
    sequence_note: VSP_021375
existing_annotations:
  - term:
      id: GO:0005634
      label: nucleus
    evidence_type: IBA
    original_reference_id: GO_REF:0000033
    review:
      summary: CDK1 localizes to the nucleus during G2 and at mitotic entry. 
        CDK1-cyclin B complexes shuttle between cytoplasm and nucleus, with 
        activation detected at centrosomes and then across nuclear compartments 
        at nuclear envelope breakdown.
      action: ACCEPT
      reason: Nuclear localization is well-established and essential for CDK1 
        function in regulating nuclear substrates including lamins. The IBA 
        annotation is phylogenetically supported across diverse eukaryotes.
      supported_by:
        - reference_id: file:human/CDK1/CDK1-deep-research-falcon.md
          supporting_text: 'model: Edison Scientific Literature'
  - term:
      id: GO:0000086
      label: G2/M transition of mitotic cell cycle
    evidence_type: IBA
    original_reference_id: GO_REF:0000033
    review:
      summary: CDK1 is THE essential kinase for G2/M transition - the defining 
        core function of this protein. CDK1 drives the bistable switch into 
        mitosis through phosphorylation of numerous mitotic substrates.
      action: ACCEPT
      reason: This is the canonical, essential function of CDK1. CDK1 is 
        uniquely essential among CDKs for mammalian cell cycle progression and 
        specifically drives G2/M transition. The IBA annotation reflects deeply 
        conserved function across all eukaryotes.
  - term:
      id: GO:0000307
      label: cyclin-dependent protein kinase holoenzyme complex
    evidence_type: IBA
    original_reference_id: GO_REF:0000033
    review:
      summary: CDK1 functions as part of a holoenzyme complex with cyclin 
        partners (principally cyclin B1, also cyclin A) and CKS subunits 
        (CKS1/2) that act as phospho-adaptors.
      action: ACCEPT
      reason: CDK1 requires cyclin binding for activity - this is fundamental to
        its function. The holoenzyme complex is the active form of the kinase.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IBA
    original_reference_id: GO_REF:0000033
    review:
      summary: CDK1 is a prototypical cyclin-dependent kinase with 
        serine/threonine kinase activity (EC 2.7.11.22/23). It requires cyclin 
        binding for catalytic activity and phosphorylates S/T-P motifs.
      action: ACCEPT
      reason: This is the core molecular function of CDK1. The enzyme activity 
        is well-characterized biochemically with defined substrate specificity 
        for S/T-P motifs.
  - term:
      id: GO:0007095
      label: mitotic G2 DNA damage checkpoint signaling
    evidence_type: IBA
    original_reference_id: GO_REF:0000033
    review:
      summary: CDK1 activity is the target of the G2 DNA damage checkpoint. The 
        checkpoint operates through inhibition of CDC25 phosphatases and 
        activation of WEE1/PKMYT1, which maintain CDK1 in an inactive, 
        phosphorylated state.
      action: ACCEPT
      reason: CDK1 is central to G2 checkpoint signaling as its activity is the 
        regulated output of the checkpoint pathway. DNA damage prevents 
        CDC25-mediated activation of CDK1.
  - term:
      id: GO:0006338
      label: chromatin remodeling
    evidence_type: IEA
    original_reference_id: GO_REF:0000108
    review:
      summary: CDK1 phosphorylates chromatin-associated proteins during mitosis 
        as part of chromosome condensation. However, CDK1 is not a dedicated 
        chromatin remodeler - this is a downstream consequence of its mitotic 
        role.
      action: KEEP_AS_NON_CORE
      reason: While CDK1 does phosphorylate chromatin-associated substrates, 
        this is part of its broader role in mitotic progression rather than a 
        core chromatin remodeling function.
  - term:
      id: GO:0006357
      label: regulation of transcription by RNA polymerase II
    evidence_type: IEA
    original_reference_id: GO_REF:0000108
    review:
      summary: CDK1 can phosphorylate the RNA Pol II CTD, but this is not its 
        core function. CDK1's transcriptional regulation role is largely through
        mitotic transcriptional shutdown.
      action: KEEP_AS_NON_CORE
      reason: CDK1 phosphorylation of RNA Pol II CTD and transcriptional 
        regulators occurs but is peripheral to its core cell cycle function.
  - term:
      id: GO:0046718
      label: symbiont entry into host cell
    evidence_type: IEA
    original_reference_id: GO_REF:0000108
    review:
      summary: This appears to be derived from CDK1 role in viral infection 
        processes. CDK1 may be exploited by viruses but this is not an evolved 
        function.
      action: MARK_AS_OVER_ANNOTATED
      reason: Viral exploitation of host cell cycle machinery does not represent
        an evolved function of CDK1. This annotation conflates pathogen 
        hijacking with host protein function.
  - term:
      id: GO:0000166
      label: nucleotide binding
    evidence_type: IEA
    original_reference_id: GO_REF:0000043
    review:
      summary: CDK1 binds ATP as a substrate for its kinase activity. This is a 
        generic annotation that follows from having kinase activity.
      action: ACCEPT
      reason: While true, this is a very general annotation implied by the 
        kinase activity. The more specific ATP binding term is more informative.
  - term:
      id: GO:0001618
      label: virus receptor activity
    evidence_type: IEA
    original_reference_id: GO_REF:0000043
    review:
      summary: This annotation appears to be based on UniProt keywords. CDK1 is 
        not a virus receptor in the canonical sense - viruses may exploit CDK1 
        function but it is not a cell surface receptor for viral entry.
      action: REMOVE
      reason: CDK1 is an intracellular kinase, not a virus receptor. This 
        annotation is misleading and likely results from misinterpretation of 
        CDK1's role in viral replication cycles.
  - term:
      id: GO:0004672
      label: protein kinase activity
    evidence_type: IEA
    original_reference_id: GO_REF:0000002
    review:
      summary: CDK1 has protein kinase activity. This is a parent term of the 
        more specific cyclin-dependent protein serine/threonine kinase activity.
      action: ACCEPT
      reason: True but generic. The more specific cyclin-dependent protein 
        kinase activity terms are more informative.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: IEA
    original_reference_id: GO_REF:0000120
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IEA
    original_reference_id: GO_REF:0000120
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
  - term:
      id: GO:0005524
      label: ATP binding
    evidence_type: IEA
    original_reference_id: GO_REF:0000120
    review:
      summary: CDK1 binds ATP as a phosphate donor for its kinase activity. The 
        ATP binding pocket is well-characterized structurally.
      action: ACCEPT
      reason: ATP binding is essential for CDK1 kinase activity. Structural data
        confirms the ATP binding site.
  - term:
      id: GO:0005634
      label: nucleus
    evidence_type: IEA
    original_reference_id: GO_REF:0000044
    review:
      summary: CDK1 localizes to the nucleus at G2 and during nuclear envelope 
        breakdown.
      action: ACCEPT
      reason: Nuclear localization is well-established for CDK1-cyclin B 
        complexes.
  - term:
      id: GO:0005737
      label: cytoplasm
    evidence_type: IEA
    original_reference_id: GO_REF:0000044
    review:
      summary: CDK1-cyclin complexes are present in the cytoplasm and shuttle 
        between cytoplasm and nucleus.
      action: ACCEPT
      reason: Cytoplasmic localization is well-documented, particularly for 
        CDK1-cyclin B complexes which are retained in cytoplasm until mitotic 
        entry.
  - term:
      id: GO:0005739
      label: mitochondrion
    evidence_type: IEA
    original_reference_id: GO_REF:0000044
    review:
      summary: CDK1-cyclin B1 localizes to mitochondria and phosphorylates 
        mitochondrial substrates including Complex I subunits to boost ATP 
        synthesis at G2/M.
      action: ACCEPT
      reason: Mitochondrial localization of CDK1-cyclin B1 has been documented 
        with functional roles in regulating mitochondrial respiration at cell 
        cycle transitions.
  - term:
      id: GO:0005813
      label: centrosome
    evidence_type: IEA
    original_reference_id: GO_REF:0000044
    review:
      summary: CDK1 localizes to centrosomes where it is first activated at 
        mitotic entry and regulates centrosome maturation and separation.
      action: ACCEPT
      reason: Centrosomal localization is well-established and functionally 
        important for CDK1 activation and mitotic spindle organization.
  - term:
      id: GO:0005819
      label: spindle
    evidence_type: IEA
    original_reference_id: GO_REF:0000044
    review:
      summary: CDK1 localizes to the mitotic spindle where it phosphorylates 
        spindle-associated substrates to regulate spindle assembly and function.
      action: ACCEPT
      reason: Spindle localization is well-documented and functional for mitotic
        regulation.
  - term:
      id: GO:0006915
      label: apoptotic process
    evidence_type: IEA
    original_reference_id: GO_REF:0000043
    review:
      summary: CDK1 phosphorylates apoptosis-related proteins including survivin
        (Thr34), caspase-9, and Bcl-2 family members as part of its extensive 
        substratome. However, apoptosis is NOT a core function of CDK1. CDK1 
        phosphorylates survivin to maintain its anti-apoptotic activity during 
        mitosis, preventing inappropriate cell death during cell division. This 
        represents phosphorylation of apoptotic regulators during normal cell 
        cycle, not an evolved apoptotic function.
      action: MARK_AS_OVER_ANNOTATED
      reason: This is the quintessential OVER-ANNOTATION. CDK1's core function 
        is cell cycle control. The fact that CDK1 phosphorylates survivin and 
        other apoptosis-related proteins among its 1000+ substrates does not 
        make apoptosis its function. This is analogous to annotating a 
        transcription factor to all processes involving its target genes. The 
        2023 Massacci review explicitly notes CDK1's apoptosis-related 
        substrates as part of the expanded CDK1 substratome but this represents 
        downstream effects of cell cycle kinase activity, not an evolved 
        apoptotic function.
  - term:
      id: GO:0008353
      label: RNA polymerase II CTD heptapeptide repeat kinase activity
    evidence_type: IEA
    original_reference_id: GO_REF:0000120
    review:
      summary: CDK1 can phosphorylate the RNA Pol II CTD. This activity has been
        demonstrated biochemically.
      action: ACCEPT
      reason: This is a documented enzymatic activity of CDK1, though not its 
        primary function.
  - term:
      id: GO:0016301
      label: kinase activity
    evidence_type: IEA
    original_reference_id: GO_REF:0000120
    review:
      summary: CDK1 is a kinase. This is a very general parent term.
      action: ACCEPT
      reason: True but generic. More specific kinase activity terms are more 
        informative.
  - term:
      id: GO:0016740
      label: transferase activity
    evidence_type: IEA
    original_reference_id: GO_REF:0000043
    review:
      summary: CDK1 has transferase activity (transfers phosphate groups). Very 
        generic term.
      action: ACCEPT
      reason: True but very generic. Implied by kinase activity.
  - term:
      id: GO:0048511
      label: rhythmic process
    evidence_type: IEA
    original_reference_id: GO_REF:0000043
    review:
      summary: CDK1 activity cycles with the cell cycle, which is a rhythmic 
        process. CDK1 also has connections to circadian rhythm.
      action: KEEP_AS_NON_CORE
      reason: The cell cycle is rhythmic, and CDK1 has been implicated in 
        circadian regulation, but rhythmic process is not the core function.
  - term:
      id: GO:0051301
      label: cell division
    evidence_type: IEA
    original_reference_id: GO_REF:0000043
    review:
      summary: CDK1 is essential for cell division. This is its core biological 
        process.
      action: ACCEPT
      reason: Cell division is the core function of CDK1. It is the only CDK 
        essential for mammalian cell division.
  - term:
      id: GO:0106310
      label: protein serine kinase activity
    evidence_type: IEA
    original_reference_id: GO_REF:0000116
    review:
      summary: CDK1 phosphorylates serine residues. More specifically it has 
        cyclin-dependent protein serine/threonine kinase activity.
      action: ACCEPT
      reason: True, CDK1 phosphorylates serine residues in S-P motifs.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:10373560
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:10373560
          supporting_text: Overproduction of human Myt1 kinase induces a G2 cell
            cycle delay by interfering with the intracellular trafficking of 
            Cdc2-cyclin B1 complexes.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:12612082
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:12612082
          supporting_text: A novel RING finger protein, human enhancer of 
            invasion 10, alters mitotic progression through regulation of cyclin
            B levels.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:15657067
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:15657067
          supporting_text: Epub 2005 Jan 17. Phosphotyrosine signaling networks 
            in epidermal growth factor receptor overexpressing squamous 
            carcinoma cells.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:17283331
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:17283331
          supporting_text: Death-effector domain-containing protein DEDD is an 
            inhibitor of mitotic Cdk1/cyclin B1.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:17349584
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:17349584
          supporting_text: Fez1/Lzts1 absence impairs Cdk1/Cdc25C interaction 
            during mitosis and predisposes mice to cancer development.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:17681274
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:17681274
          supporting_text: 'Cell death in leukemia: passenger protein regulation by
            topoisomerase inhibitors.'
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:18337751
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:18337751
          supporting_text: cdc2-cyclin B regulates eEF2 kinase activity in a 
            cell cycle- and amino acid-dependent manner.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:18408765
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:18408765
          supporting_text: CDK1 promotes cell proliferation and survival via 
            phosphorylation and inhibition of FOXO1 transcription factor.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:19879842
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:19879842
          supporting_text: Regulation of MBK-2/DYRK by CDK-1 and the 
            pseudophosphatases EGG-4 and EGG-5 during the oocyte-to-embryo 
            transition.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:20395957
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:20395957
          supporting_text: New Cdc2 Tyr 4 phosphorylation by dsRNA-activated 
            protein kinase triggers Cdc2 polyubiquitination and G2 arrest under 
            genotoxic stresses.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:21041660
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:21041660
          supporting_text: Cell division cycle 6, a mitotic substrate of 
            polo-like kinase 1, regulates chromosomal segregation mediated by 
            cyclin-dependent kinase 1 and separase.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:23543736
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:23543736
          supporting_text: 2013 Mar 29. Ubiquitin C-terminal hydrolase L1 
            (UCH-L1) acts as a novel potentiator of cyclin-dependent kinases to 
            enhance cell proliferation independently of its hydrolase activity.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:23602568
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:23602568
          supporting_text: 2013 Apr 18. The protein interaction landscape of the
            human CMGC kinase group.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:23799914
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:23799914
          supporting_text: Sulforaphane induced cell cycle arrest in the G2/M 
            phase via the blockade of cyclin B1/CDC2 in human ovarian cancer 
            cells.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:24218572
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:24218572
          supporting_text: CDK10/cyclin M is a protein kinase that controls ETS2
            degradation and is deficient in STAR syndrome.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:24358021
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:24358021
          supporting_text: 2013 Dec 17. Polycomb protein SCML2 regulates the 
            cell cycle by binding and modulating CDK/CYCLIN/p21 complexes.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:24658140
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:24658140
          supporting_text: The mammalian-membrane two-hybrid assay (MaMTH) for 
            probing membrane-protein interactions in human cells.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:25218637
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:25218637
          supporting_text: Sep 14. RASSF1A-LATS1 signalling stabilizes 
            replication forks by restricting CDK2-mediated phosphorylation of 
            BRCA2.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:25416956
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:25416956
          supporting_text: A proteome-scale map of the human interactome 
            network.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:25852190
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:25852190
          supporting_text: Integrative analysis of kinase networks in 
            TRAIL-induced apoptosis provides a source of potential targets for 
            combination therapy.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:26496610
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:26496610
          supporting_text: Oct 22. A human interactome in three quantitative 
            dimensions organized by stoichiometries and abundances.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:27626412
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:27626412
          supporting_text: Sulforaphane, a Dietary Isothiocyanate, Induces Gβ‚‚/M 
            Arrest in Cervical Cancer Cells through CyclinB1 Downregulation and 
            GADD45Ξ²/CDC2 Association.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:27880917
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:27880917
          supporting_text: Phenotypic and Interaction Profiling of the Human 
            Phosphatases Identifies Diverse Mitotic Regulators.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:28514442
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:28514442
          supporting_text: Architecture of the human interactome defines protein
            communities and disease networks.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:29128334
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:29128334
          supporting_text: 2017 Nov 8. A Map of Human Mitochondrial Protein 
            Interactions Linked to Neurodegeneration Reveals New Mechanisms of 
            Redox Homeostasis and NF-ΞΊB Signaling.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:30833792
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:30833792
          supporting_text: Mar 4. A protein-interaction network of 
            interferon-stimulated genes extends the innate immune system 
            landscape.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:31980649
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:31980649
          supporting_text: Extensive rewiring of the EGFR network in colorectal 
            cancer cells expressing transforming levels of KRAS(G13D).
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:32707033
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:32707033
          supporting_text: 2020 Jul 23. Kinase Interaction Network Expands 
            Functional and Disease Roles of Human Kinases.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:32814053
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:32814053
          supporting_text: Interactome Mapping Provides a Network of 
            Neurodegenerative Disease Proteins and Uncovers Widespread Protein 
            Aggregation in Affected Brains.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:33037310
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:33037310
          supporting_text: The sequence at Spike S1/S2 site enables cleavage by 
            furin and phospho-regulation in SARS-CoV2 but not in SARS-CoV1 or 
            MERS-CoV.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:33961781
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:33961781
          supporting_text: 2021 May 6. Dual proteome-scale networks reveal 
            cell-specific remodeling of the human interactome.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:34591612
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:34591612
          supporting_text: Oct 1. A protein interaction landscape of breast 
            cancer.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:35271311
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:35271311
          supporting_text: '2022 Mar 11. OpenCell: Endogenous tagging for the cartography
            of human cellular organization.'
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:7815540
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:7815540
          supporting_text: Simian virus 40 large T antigen affects the 
            Saccharomyces cerevisiae cell cycle and interacts with p34CDC28.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:9001210
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:9001210
          supporting_text: The human Myt1 kinase preferentially phosphorylates 
            Cdc2 on threonine 14 and localizes to the endoplasmic reticulum and 
            Golgi complex.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:9988268
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:9988268
          supporting_text: Human homologue of the Drosophila melanogaster lats 
            tumour suppressor modulates CDC2 activity.
  - term:
      id: GO:0003682
      label: chromatin binding
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 binds to chromatin during mitosis. This is consistent with 
        its role in chromosome condensation and nuclear envelope breakdown.
      action: ACCEPT
      reason: Chromatin binding is documented and functionally relevant for 
        CDK1's mitotic role.
  - term:
      id: GO:0005759
      label: mitochondrial matrix
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1-cyclin B1 localization to mitochondrial matrix has been 
        documented with roles in regulating ATP synthesis at G2/M.
      action: ACCEPT
      reason: Mitochondrial matrix localization has experimental support.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0009636
      label: response to toxic substance
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 expression/activity may change in response to toxic 
        substances, but this is not a core function.
      action: MARK_AS_OVER_ANNOTATED
      reason: Responding to toxic substances is not a core evolved function of 
        CDK1. This likely reflects cell cycle perturbation under stress 
        conditions.
  - term:
      id: GO:0010628
      label: positive regulation of gene expression
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 can regulate gene expression through phosphorylation of 
        transcription factors and RNA Pol II CTD.
      action: KEEP_AS_NON_CORE
      reason: While CDK1 affects gene expression, this is not its core function.
  - term:
      id: GO:0014075
      label: response to amine
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 involvement in response to amine is not a core function.
      action: MARK_AS_OVER_ANNOTATED
      reason: This is likely a downstream or indirect effect, not a core evolved
        function.
  - term:
      id: GO:0014823
      label: response to activity
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: Not a core function of CDK1.
      action: MARK_AS_OVER_ANNOTATED
      reason: This is not a core evolved function of CDK1.
  - term:
      id: GO:0030261
      label: chromosome condensation
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 phosphorylates condensin subunits to promote chromosome 
        condensation during mitosis. This is part of its core mitotic function.
      action: ACCEPT
      reason: Chromosome condensation is a direct consequence of CDK1 activity 
        on mitotic substrates including condensins.
  - term:
      id: GO:0030544
      label: Hsp70 protein binding
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 may bind Hsp70 chaperones but this is not a core function.
      action: KEEP_AS_NON_CORE
      reason: Chaperone interactions are common for kinases but not a primary 
        function.
  - term:
      id: GO:0035173
      label: histone kinase activity
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 phosphorylates histones including H1 and H3. This is part of
        mitotic chromatin regulation.
      action: ACCEPT
      reason: Histone phosphorylation by CDK1 is documented and functionally 
        relevant for mitotic chromatin dynamics.
  - term:
      id: GO:0042307
      label: positive regulation of protein import into nucleus
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 phosphorylates substrates that affect nuclear import, but 
        this is not a core function.
      action: KEEP_AS_NON_CORE
      reason: Nuclear transport effects are downstream of CDK1's mitotic 
        activity.
  - term:
      id: GO:0042542
      label: response to hydrogen peroxide
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 involvement in oxidative stress response is not a core 
        function.
      action: MARK_AS_OVER_ANNOTATED
      reason: This is not a core evolved function of CDK1.
  - term:
      id: GO:0045471
      label: response to ethanol
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 involvement in ethanol response is not a core function.
      action: MARK_AS_OVER_ANNOTATED
      reason: This is not a core evolved function of CDK1.
  - term:
      id: GO:0045740
      label: positive regulation of DNA replication
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 regulates replication origin licensing and S-phase entry, 
        though CDK2 is more traditionally associated with S-phase.
      action: KEEP_AS_NON_CORE
      reason: DNA replication regulation is a secondary function; CDK1's primary
        role is G2/M transition.
  - term:
      id: GO:0046686
      label: response to cadmium ion
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 involvement in cadmium response is not a core function.
      action: MARK_AS_OVER_ANNOTATED
      reason: This is not a core evolved function of CDK1.
  - term:
      id: GO:0046688
      label: response to copper ion
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 involvement in copper response is not a core function.
      action: MARK_AS_OVER_ANNOTATED
      reason: This is not a core evolved function of CDK1.
  - term:
      id: GO:0048678
      label: response to axon injury
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 involvement in axon injury response is not a core function.
      action: MARK_AS_OVER_ANNOTATED
      reason: This is not a core evolved function of CDK1.
  - term:
      id: GO:0055015
      label: ventricular cardiac muscle cell development
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 is required for cell division during cardiac development, 
        but cardiac muscle cell development per se is not a core function.
      action: MARK_AS_OVER_ANNOTATED
      reason: CDK1 is required for cell division in all tissues including heart,
        but cardiac development is not its core function.
  - term:
      id: GO:0060045
      label: positive regulation of cardiac muscle cell proliferation
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 drives cell division, including in cardiac muscle cells. 
        However, this is not cardiac-specific function.
      action: MARK_AS_OVER_ANNOTATED
      reason: CDK1 drives cell division universally; annotating to specific 
        tissue types represents over-annotation.
  - term:
      id: GO:0065003
      label: protein-containing complex assembly
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 forms complexes with cyclins and CKS subunits, and 
        phosphorylation of substrates can affect complex assembly.
      action: KEEP_AS_NON_CORE
      reason: CDK1 is part of complexes but general complex assembly is not its 
        core function.
  - term:
      id: GO:0070301
      label: cellular response to hydrogen peroxide
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 involvement in oxidative stress response is not a core 
        function.
      action: MARK_AS_OVER_ANNOTATED
      reason: This is not a core evolved function of CDK1.
  - term:
      id: GO:0090166
      label: Golgi disassembly
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 phosphorylates GRASP65/GM130 and other Golgi proteins to 
        promote Golgi fragmentation during mitosis.
      action: ACCEPT
      reason: Golgi disassembly is a documented mitotic function mediated by 
        CDK1 phosphorylation of Golgi structural proteins.
  - term:
      id: GO:0097472
      label: cyclin-dependent protein kinase activity
    evidence_type: IEA
    original_reference_id: GO_REF:0000107
    review:
      summary: CDK1 has cyclin-dependent protein kinase activity. This is its 
        core molecular function.
      action: ACCEPT
      reason: This is the core molecular function of CDK1.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:31279575
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
      supported_by:
        - reference_id: PMID:31279575
          supporting_text: 2019 Jul 3. Phosphorylation of Ci/Gli by Fused Family
            Kinases Promotes Hedgehog Signaling.
  - term:
      id: GO:0045880
      label: positive regulation of smoothened signaling pathway
    evidence_type: IDA
    original_reference_id: PMID:31279575
    review:
      summary: CDK1 phosphorylation of Ci/Gli promotes Hedgehog signaling. This 
        is a documented substrate effect but not a core function.
      action: KEEP_AS_NON_CORE
      reason: While CDK1 can phosphorylate Hedgehog pathway components, this is 
        not its core evolved function.
      supported_by:
        - reference_id: PMID:31279575
          supporting_text: 2019 Jul 3. Phosphorylation of Ci/Gli by Fused Family
            Kinases Promotes Hedgehog Signaling.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: IDA
    original_reference_id: GO_REF:0000052
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: IDA
    original_reference_id: GO_REF:0000052
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0000086
      label: G2/M transition of mitotic cell cycle
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-69275
    review:
      summary: G2/M transition is THE core function of CDK1. It is uniquely 
        required among all CDKs for mammalian cell division.
      action: ACCEPT
      reason: This is the canonical, essential function of CDK1.
  - term:
      id: GO:0016579
      label: protein deubiquitination
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-5688426
    review:
      summary: CDK1 is not a deubiquitinase. This annotation likely reflects 
        CDK1's role in a pathway involving deubiquitination, not direct 
        activity.
      action: MARK_AS_OVER_ANNOTATED
      reason: CDK1 does not catalyze deubiquitination. This is an example of 
        pathway annotation being misattributed to a participant.
  - term:
      id: GO:0070371
      label: ERK1 and ERK2 cascade
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-110056
    review:
      summary: CDK1 can phosphorylate MAP2K1 (MEK1) contributing to ERK cascade 
        regulation, but this is not its core function.
      action: KEEP_AS_NON_CORE
      reason: While CDK1 can affect ERK signaling, this is not its primary 
        evolved function.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-112342
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-8940100
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-4088024
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-5692755
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929514
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929532
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929535
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929717
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929719
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929720
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929721
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929884
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929904
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929935
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
  - term:
      id: GO:0000086
      label: G2/M transition of mitotic cell cycle
    evidence_type: NAS
    original_reference_id: PMID:17495531
    review:
      summary: G2/M transition is THE core function of CDK1. It is uniquely 
        required among all CDKs for mammalian cell division.
      action: ACCEPT
      reason: This is the canonical, essential function of CDK1.
      supported_by:
        - reference_id: PMID:17495531
          supporting_text: Cyclin B and cyclin A confer different substrate 
            recognition properties on CDK2.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:22411829
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
      supported_by:
        - reference_id: PMID:22411829
          supporting_text: M phase phosphorylation of the epigenetic regulator 
            UHRF1 regulates its physical association with the deubiquitylase 
            USP7 and stability.
  - term:
      id: GO:2000060
      label: positive regulation of ubiquitin-dependent protein catabolic 
        process
    evidence_type: IDA
    original_reference_id: PMID:22411829
    review:
      summary: CDK1 phosphorylation of substrates can regulate their stability 
        via ubiquitination.
      action: KEEP_AS_NON_CORE
      reason: While CDK1 phosphorylation can affect substrate ubiquitination and
        degradation, this is not its core evolved function.
      supported_by:
        - reference_id: PMID:22411829
          supporting_text: M phase phosphorylation of the epigenetic regulator 
            UHRF1 regulates its physical association with the deubiquitylase 
            USP7 and stability.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:23509069
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
      supported_by:
        - reference_id: PMID:23509069
          supporting_text: MISP is a novel Plk1 substrate required for proper 
            spindle orientation and mitotic progression.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:40440427
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
      supported_by:
        - reference_id: PMID:40440427
          supporting_text: 2025 May 29. ASB7 is a negative regulator of H3K9me3 
            homeostasis.
  - term:
      id: GO:0031397
      label: negative regulation of protein ubiquitination
    evidence_type: IDA
    original_reference_id: PMID:40440427
    review:
      summary: CDK1 phosphorylation can inhibit ubiquitination of some 
        substrates.
      action: KEEP_AS_NON_CORE
      reason: Effects on substrate ubiquitination are downstream of kinase 
        activity.
      supported_by:
        - reference_id: PMID:40440427
          supporting_text: 2025 May 29. ASB7 is a negative regulator of H3K9me3 
            homeostasis.
  - term:
      id: GO:0120261
      label: regulation of heterochromatin organization
    evidence_type: IDA
    original_reference_id: PMID:40440427
    review:
      summary: CDK1 affects heterochromatin organization through substrate 
        phosphorylation.
      action: KEEP_AS_NON_CORE
      reason: Chromatin effects are downstream of CDK1's mitotic role.
      supported_by:
        - reference_id: PMID:40440427
          supporting_text: 2025 May 29. ASB7 is a negative regulator of H3K9me3 
            homeostasis.
  - term:
      id: GO:0000082
      label: G1/S transition of mitotic cell cycle
    evidence_type: NAS
    original_reference_id: PMID:1312467
    review:
      summary: CDK1 can participate in G1/S with cyclin A, though CDK2 is 
        traditionally considered the main G1/S kinase.
      action: KEEP_AS_NON_CORE
      reason: CDK1 can compensate for CDK2 at G1/S, but G2/M is its primary 
        function.
      supported_by:
        - reference_id: PMID:1312467
          supporting_text: Cyclin A is required at two points in the human cell 
            cycle.
  - term:
      id: GO:0000086
      label: G2/M transition of mitotic cell cycle
    evidence_type: NAS
    original_reference_id: PMID:1312467
    review:
      summary: G2/M transition is THE core function of CDK1. It is uniquely 
        required among all CDKs for mammalian cell division.
      action: ACCEPT
      reason: This is the canonical, essential function of CDK1.
      supported_by:
        - reference_id: PMID:1312467
          supporting_text: Cyclin A is required at two points in the human cell 
            cycle.
  - term:
      id: GO:0000082
      label: G1/S transition of mitotic cell cycle
    evidence_type: IDA
    original_reference_id: PMID:11687586
    review:
      summary: CDK1 can participate in G1/S with cyclin A, though CDK2 is 
        traditionally considered the main G1/S kinase.
      action: KEEP_AS_NON_CORE
      reason: CDK1 can compensate for CDK2 at G1/S, but G2/M is its primary 
        function.
      supported_by:
        - reference_id: PMID:11687586
          supporting_text: Oct 30. RGC-32 increases p34CDC2 kinase activity and 
            entry of aortic smooth muscle cells into S-phase.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:25012651
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
      supported_by:
        - reference_id: PMID:25012651
          supporting_text: Epub 2014 Jul 10. Ki67 antigen contributes to the 
            timely accumulation of protein phosphatase 1Ξ³ on anaphase 
            chromosomes.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:32491969
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
      supported_by:
        - reference_id: PMID:32491969
          supporting_text: 2020 Jun 3. Multisite phosphorylation determines the 
            formation of Ska-Ndc80 macro-complexes that are essential for 
            chromosome segregation during mitosis.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:31804178
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
      supported_by:
        - reference_id: PMID:31804178
          supporting_text: Molecular determinants of the Ska-Ndc80 interaction 
            and their influence on microtubule tracking and force-coupling.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:28479321
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
      supported_by:
        - reference_id: PMID:28479321
          supporting_text: Epub 2017 May 4. Ska3 Phosphorylated by Cdk1 Binds 
            Ndc80 and Recruits Ska to Kinetochores to Promote Mitotic 
            Progression.
  - term:
      id: GO:0034501
      label: protein localization to kinetochore
    evidence_type: IMP
    original_reference_id: PMID:28479321
    review:
      summary: CDK1 phosphorylation promotes localization of proteins to 
        kinetochores.
      action: ACCEPT
      reason: Kinetochore function is part of CDK1's core mitotic role.
      supported_by:
        - reference_id: PMID:28479321
          supporting_text: Epub 2017 May 4. Ska3 Phosphorylated by Cdk1 Binds 
            Ndc80 and Recruits Ska to Kinetochores to Promote Mitotic 
            Progression.
  - term:
      id: GO:1902423
      label: regulation of attachment of mitotic spindle microtubules to 
        kinetochore
    evidence_type: IDA
    original_reference_id: PMID:28479321
    review:
      summary: CDK1 regulates kinetochore-microtubule attachment through Ska 
        phosphorylation.
      action: ACCEPT
      reason: This is part of CDK1's core mitotic function.
      supported_by:
        - reference_id: PMID:28479321
          supporting_text: Epub 2017 May 4. Ska3 Phosphorylated by Cdk1 Binds 
            Ndc80 and Recruits Ska to Kinetochores to Promote Mitotic 
            Progression.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:19202191
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
      supported_by:
        - reference_id: PMID:19202191
          supporting_text: 2009 Feb 7. Human CtIP mediates cell cycle control of
            DNA end resection and double strand break repair.
  - term:
      id: GO:0006974
      label: DNA damage response
    evidence_type: IDA
    original_reference_id: PMID:19202191
    review:
      summary: CDK1 phosphorylates CtIP to control DNA end resection, linking 
        cell cycle to DNA repair. This is a documented function though secondary
        to mitotic control.
      action: KEEP_AS_NON_CORE
      reason: DNA damage response is linked to CDK1 through CtIP 
        phosphorylation, but the primary function remains cell cycle control.
      supported_by:
        - reference_id: PMID:19202191
          supporting_text: 2009 Feb 7. Human CtIP mediates cell cycle control of
            DNA end resection and double strand break repair.
  - term:
      id: GO:0000086
      label: G2/M transition of mitotic cell cycle
    evidence_type: IDA
    original_reference_id: PMID:30139873
    review:
      summary: G2/M transition is THE core function of CDK1. It is uniquely 
        required among all CDKs for mammalian cell division.
      action: ACCEPT
      reason: This is the canonical, essential function of CDK1.
      supported_by:
        - reference_id: PMID:30139873
          supporting_text: An intrinsic S/G(2) checkpoint enforced by ATR.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:30139873
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
      supported_by:
        - reference_id: PMID:30139873
          supporting_text: An intrinsic S/G(2) checkpoint enforced by ATR.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:37788673
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
      supported_by:
        - reference_id: PMID:37788673
          supporting_text: Epub 2023 Oct 2. ATR promotes clearance of damaged 
            DNA and damaged cells by rupturing micronuclei.
  - term:
      id: GO:0007077
      label: mitotic nuclear membrane disassembly
    evidence_type: IDA
    original_reference_id: PMID:2188730
    review:
      summary: CDK1 phosphorylates nuclear lamins to promote nuclear envelope 
        breakdown. Classic CDK1 function demonstrated in foundational studies.
      action: ACCEPT
      reason: Nuclear envelope breakdown via lamin phosphorylation is a 
        canonical CDK1 function.
      supported_by:
        - reference_id: PMID:2188730
          supporting_text: Identification of cell cycle-regulated 
            phosphorylation sites on nuclear lamin C.
  - term:
      id: GO:0000086
      label: G2/M transition of mitotic cell cycle
    evidence_type: IDA
    original_reference_id: PMID:2188730
    review:
      summary: G2/M transition is THE core function of CDK1. It is uniquely 
        required among all CDKs for mammalian cell division.
      action: ACCEPT
      reason: This is the canonical, essential function of CDK1.
      supported_by:
        - reference_id: PMID:2188730
          supporting_text: Identification of cell cycle-regulated 
            phosphorylation sites on nuclear lamin C.
  - term:
      id: GO:0000086
      label: G2/M transition of mitotic cell cycle
    evidence_type: IDA
    original_reference_id: PMID:2344612
    review:
      summary: G2/M transition is THE core function of CDK1. It is uniquely 
        required among all CDKs for mammalian cell division.
      action: ACCEPT
      reason: This is the canonical, essential function of CDK1.
      supported_by:
        - reference_id: PMID:2344612
          supporting_text: Mutations of phosphorylation sites in lamin A that 
            prevent nuclear lamina disassembly in mitosis.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:2188730
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
      supported_by:
        - reference_id: PMID:2188730
          supporting_text: Identification of cell cycle-regulated 
            phosphorylation sites on nuclear lamin C.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:2344612
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
      supported_by:
        - reference_id: PMID:2344612
          supporting_text: Mutations of phosphorylation sites in lamin A that 
            prevent nuclear lamina disassembly in mitosis.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:34741373
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
      supported_by:
        - reference_id: PMID:34741373
          supporting_text: CDK1/FBXW7 facilitates degradation and ubiquitination
            of MLST8 to inhibit progression of renal cell carcinoma.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9836184
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:34734636
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
      supported_by:
        - reference_id: PMID:34734636
          supporting_text: Dec 2. Mitotic chromosome condensation requires 
            phosphorylation of the centromeric protein KNL-2 in C.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:10791892
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
      supported_by:
        - reference_id: PMID:10791892
          supporting_text: Ser787 in the proline-rich region of human MAP4 is a 
            critical phosphorylation site that reduces its activity to promote 
            tubulin polymerization.
  - term:
      id: GO:1902850
      label: microtubule cytoskeleton organization involved in mitosis
    evidence_type: IDA
    original_reference_id: PMID:10791892
    review:
      summary: CDK1 phosphorylates MAP4 and other microtubule-associated 
        proteins to regulate microtubule dynamics during mitosis.
      action: ACCEPT
      reason: This is part of CDK1's core mitotic function - regulating the 
        microtubule cytoskeleton for spindle assembly.
      supported_by:
        - reference_id: PMID:10791892
          supporting_text: Ser787 in the proline-rich region of human MAP4 is a 
            critical phosphorylation site that reduces its activity to promote 
            tubulin polymerization.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:26829474
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
      supported_by:
        - reference_id: PMID:26829474
          supporting_text: Feb 1. Acetylation of Aurora B by TIP60 ensures 
            accurate chromosomal segregation.
  - term:
      id: GO:0062033
      label: positive regulation of mitotic sister chromatid segregation
    evidence_type: IDA
    original_reference_id: PMID:26829474
    review:
      summary: CDK1 promotes chromosome segregation through various substrates 
        including effects on Aurora B.
      action: ACCEPT
      reason: Sister chromatid segregation is part of CDK1's core mitotic 
        function.
      supported_by:
        - reference_id: PMID:26829474
          supporting_text: Feb 1. Acetylation of Aurora B by TIP60 ensures 
            accurate chromosomal segregation.
  - term:
      id: GO:0016301
      label: kinase activity
    evidence_type: IDA
    original_reference_id: PMID:28575661
    review:
      summary: CDK1 is a kinase. This is a very general parent term.
      action: ACCEPT
      reason: True but generic. More specific kinase activity terms are more 
        informative.
      supported_by:
        - reference_id: PMID:28575661
          supporting_text: RECQ5 Helicase Cooperates with MUS81 Endonuclease in 
            Processing Stalled Replication Forks at Common Fragile Sites during 
            Mitosis.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:25753036
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
      supported_by:
        - reference_id: PMID:25753036
          supporting_text: Mar 9. Cdk1 phosphorylates SPAT-1/Bora to trigger 
            PLK-1 activation and drive mitotic entry in C.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:7588608
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
      supported_by:
        - reference_id: PMID:7588608
          supporting_text: 'ERF: an ETS domain protein with strong transcriptional
            repressor activity, can suppress ets-associated tumorigenesis and is regulated
            by phosphorylation during cell cycle and mitogenic stimulation.'
  - term:
      id: GO:0004672
      label: protein kinase activity
    evidence_type: IDA
    original_reference_id: PMID:23574715
    review:
      summary: CDK1 has protein kinase activity. This is a parent term of the 
        more specific cyclin-dependent protein serine/threonine kinase activity.
      action: ACCEPT
      reason: True but generic. The more specific cyclin-dependent protein 
        kinase activity terms are more informative.
      supported_by:
        - reference_id: PMID:23574715
          supporting_text: The novel actin/focal adhesion-associated protein 
            MISP is involved in mitotic spindle positioning in human cells.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:23509069
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:23509069
          supporting_text: MISP is a novel Plk1 substrate required for proper 
            spindle orientation and mitotic progression.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:27238018
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:27238018
          supporting_text: May 26. Circadian Amplitude Regulation via 
            FBXW7-Targeted REV-ERBΞ± Degradation.
  - term:
      id: GO:0018107
      label: peptidyl-threonine phosphorylation
    evidence_type: IMP
    original_reference_id: PMID:27238018
    review:
      summary: CDK1 phosphorylates threonine residues. This is consistent with 
        its S/T kinase activity.
      action: ACCEPT
      reason: Consistent with core kinase activity.
      supported_by:
        - reference_id: PMID:27238018
          supporting_text: May 26. Circadian Amplitude Regulation via 
            FBXW7-Targeted REV-ERBΞ± Degradation.
  - term:
      id: GO:0042752
      label: regulation of circadian rhythm
    evidence_type: IMP
    original_reference_id: PMID:27238018
    review:
      summary: CDK1 phosphorylation of REV-ERBalpha affects circadian rhythm. 
        This is a documented but non-core function.
      action: KEEP_AS_NON_CORE
      reason: Circadian regulation is a documented function but not the core 
        evolved purpose of CDK1.
      supported_by:
        - reference_id: PMID:27238018
          supporting_text: May 26. Circadian Amplitude Regulation via 
            FBXW7-Targeted REV-ERBΞ± Degradation.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:23601106
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
      supported_by:
        - reference_id: PMID:23601106
          supporting_text: The retroviral restriction ability of SAMHD1, but not
            its deoxynucleotide triphosphohydrolase activity, is regulated by 
            phosphorylation.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:23601106
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:23601106
          supporting_text: The retroviral restriction ability of SAMHD1, but not
            its deoxynucleotide triphosphohydrolase activity, is regulated by 
            phosphorylation.
  - term:
      id: GO:0005634
      label: nucleus
    evidence_type: IDA
    original_reference_id: PMID:15767402
    review:
      summary: CDK1 localizes to the nucleus at G2 and during nuclear envelope 
        breakdown.
      action: ACCEPT
      reason: Nuclear localization is well-established for CDK1-cyclin B 
        complexes.
      supported_by:
        - reference_id: PMID:15767402
          supporting_text: Human papillomavirus type 16 E1 E4-induced G2 arrest 
            is associated with cytoplasmic retention of active Cdk1/cyclin B1 
            complexes.
  - term:
      id: GO:0005737
      label: cytoplasm
    evidence_type: IDA
    original_reference_id: PMID:15767402
    review:
      summary: CDK1-cyclin complexes are present in the cytoplasm and shuttle 
        between cytoplasm and nucleus.
      action: ACCEPT
      reason: Cytoplasmic localization is well-documented, particularly for 
        CDK1-cyclin B complexes which are retained in cytoplasm until mitotic 
        entry.
      supported_by:
        - reference_id: PMID:15767402
          supporting_text: Human papillomavirus type 16 E1 E4-induced G2 arrest 
            is associated with cytoplasmic retention of active Cdk1/cyclin B1 
            complexes.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IMP
    original_reference_id: PMID:24746669
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
      supported_by:
        - reference_id: PMID:24746669
          supporting_text: 2014 Apr 17. Cyclin B1/Cdk1 coordinates mitochondrial
            respiration for cell-cycle G2/M progression.
  - term:
      id: GO:0005759
      label: mitochondrial matrix
    evidence_type: IDA
    original_reference_id: PMID:24746669
    review:
      summary: CDK1-cyclin B1 localization to mitochondrial matrix has been 
        documented with roles in regulating ATP synthesis at G2/M.
      action: ACCEPT
      reason: Mitochondrial matrix localization has experimental support.
      supported_by:
        - reference_id: PMID:24746669
          supporting_text: 2014 Apr 17. Cyclin B1/Cdk1 coordinates mitochondrial
            respiration for cell-cycle G2/M progression.
  - term:
      id: GO:0010971
      label: positive regulation of G2/M transition of mitotic cell cycle
    evidence_type: IMP
    original_reference_id: PMID:24746669
    review:
      summary: CDK1 promotes G2/M transition - this is its core function.
      action: ACCEPT
      reason: Core function.
      supported_by:
        - reference_id: PMID:24746669
          supporting_text: 2014 Apr 17. Cyclin B1/Cdk1 coordinates mitochondrial
            respiration for cell-cycle G2/M progression.
  - term:
      id: GO:0030332
      label: cyclin binding
    evidence_type: IPI
    original_reference_id: PMID:24746669
    review:
      summary: CDK1 binds cyclins (A and B). This is essential for its activity.
      action: ACCEPT
      reason: Cyclin binding is essential for CDK1 function. More informative 
        than generic protein binding.
      supported_by:
        - reference_id: PMID:24746669
          supporting_text: 2014 Apr 17. Cyclin B1/Cdk1 coordinates mitochondrial
            respiration for cell-cycle G2/M progression.
  - term:
      id: GO:0097125
      label: cyclin B1-CDK1 complex
    evidence_type: IMP
    original_reference_id: PMID:24746669
    review:
      summary: CDK1 forms complex with cyclin B1. This is the active holoenzyme.
      action: ACCEPT
      reason: The cyclin B1-CDK1 complex is the principal active form of CDK1 in
        mitosis.
      supported_by:
        - reference_id: PMID:24746669
          supporting_text: 2014 Apr 17. Cyclin B1/Cdk1 coordinates mitochondrial
            respiration for cell-cycle G2/M progression.
  - term:
      id: GO:1905448
      label: positive regulation of mitochondrial ATP synthesis coupled electron
        transport
    evidence_type: IMP
    original_reference_id: PMID:24746669
    review:
      summary: CDK1-cyclin B1 phosphorylates mitochondrial substrates to boost 
        ATP production at G2/M. This coordinates energy metabolism with cell 
        cycle.
      action: KEEP_AS_NON_CORE
      reason: While documented, metabolic regulation is a secondary function 
        that supports the primary cell cycle role.
      supported_by:
        - reference_id: PMID:24746669
          supporting_text: 2014 Apr 17. Cyclin B1/Cdk1 coordinates mitochondrial
            respiration for cell-cycle G2/M progression.
  - term:
      id: GO:0000307
      label: cyclin-dependent protein kinase holoenzyme complex
    evidence_type: IDA
    original_reference_id: PMID:1312467
    review:
      summary: CDK1 functions as part of the CDK holoenzyme complex with 
        cyclins.
      action: ACCEPT
      reason: CDK1 requires cyclin binding for activity.
      supported_by:
        - reference_id: PMID:1312467
          supporting_text: Cyclin A is required at two points in the human cell 
            cycle.
  - term:
      id: GO:0097472
      label: cyclin-dependent protein kinase activity
    evidence_type: IDA
    original_reference_id: PMID:1312467
    review:
      summary: CDK1 has cyclin-dependent protein kinase activity. This is its 
        core molecular function.
      action: ACCEPT
      reason: This is the core molecular function of CDK1.
      supported_by:
        - reference_id: PMID:1312467
          supporting_text: Cyclin A is required at two points in the human cell 
            cycle.
  - term:
      id: GO:0030332
      label: cyclin binding
    evidence_type: IPI
    original_reference_id: PMID:1312467
    review:
      summary: CDK1 binds cyclins (A and B). This is essential for its activity.
      action: ACCEPT
      reason: Cyclin binding is essential for CDK1 function. More informative 
        than generic protein binding.
      supported_by:
        - reference_id: PMID:1312467
          supporting_text: Cyclin A is required at two points in the human cell 
            cycle.
  - term:
      id: GO:0005789
      label: endoplasmic reticulum membrane
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-8940100
    review:
      summary: CDK1 may localize to ER membrane in some contexts.
      action: ACCEPT
      reason: ER-associated CDK1 has been documented.
  - term:
      id: GO:0030332
      label: cyclin binding
    evidence_type: IDA
    original_reference_id: PMID:7739547
    review:
      summary: CDK1 binds cyclins (A and B). This is essential for its activity.
      action: ACCEPT
      reason: Cyclin binding is essential for CDK1 function. More informative 
        than generic protein binding.
      supported_by:
        - reference_id: PMID:7739547
          supporting_text: Novel INK4 proteins, p19 and p18, are specific 
            inhibitors of the cyclin D-dependent kinases CDK4 and CDK6.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:26808496
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:26808496
          supporting_text: eCollection 2016. Comparative Proteomics Reveals 
            Important Viral-Host Interactions in HCV-Infected Human Liver Cells.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:27030108
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
      supported_by:
        - reference_id: PMID:27030108
          supporting_text: Phosphorylation of EB2 by Aurora B and CDK1 ensures 
            mitotic progression and genome stability.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:21871177
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
      supported_by:
        - reference_id: PMID:21871177
          supporting_text: Ribosomal protein S3 is phosphorylated by Cdk1/cdc2 
            during G2/M phase.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:21871177
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:21871177
          supporting_text: Ribosomal protein S3 is phosphorylated by Cdk1/cdc2 
            during G2/M phase.
  - term:
      id: GO:0035173
      label: histone kinase activity
    evidence_type: IDA
    original_reference_id: PMID:21871177
    review:
      summary: CDK1 phosphorylates histones including H1 and H3. This is part of
        mitotic chromatin regulation.
      action: ACCEPT
      reason: Histone phosphorylation by CDK1 is documented and functionally 
        relevant for mitotic chromatin dynamics.
      supported_by:
        - reference_id: PMID:21871177
          supporting_text: Ribosomal protein S3 is phosphorylated by Cdk1/cdc2 
            during G2/M phase.
  - term:
      id: GO:1900182
      label: positive regulation of protein localization to nucleus
    evidence_type: IMP
    original_reference_id: PMID:21871177
    review:
      summary: CDK1 phosphorylation can regulate nuclear localization of 
        substrates.
      action: KEEP_AS_NON_CORE
      reason: Downstream effect of kinase activity on specific substrates.
      supported_by:
        - reference_id: PMID:21871177
          supporting_text: Ribosomal protein S3 is phosphorylated by Cdk1/cdc2 
            during G2/M phase.
  - term:
      id: GO:0090166
      label: Golgi disassembly
    evidence_type: ISS
    original_reference_id: GO_REF:0000024
    review:
      summary: CDK1 phosphorylates GRASP65/GM130 and other Golgi proteins to 
        promote Golgi fragmentation during mitosis.
      action: ACCEPT
      reason: Golgi disassembly is a documented mitotic function mediated by 
        CDK1 phosphorylation of Golgi structural proteins.
  - term:
      id: GO:0000781
      label: chromosome, telomeric region
    evidence_type: HDA
    original_reference_id: PMID:19135898
    review:
      summary: CDK1 association with telomeric regions has been detected in 
        high-throughput analysis.
      action: KEEP_AS_NON_CORE
      reason: Telomeric localization may be part of chromosome-associated 
        functions but is not a core function.
      supported_by:
        - reference_id: PMID:19135898
          supporting_text: Purification of proteins associated with specific 
            genomic Loci.
  - term:
      id: GO:0004672
      label: protein kinase activity
    evidence_type: IDA
    original_reference_id: PMID:22854038
    review:
      summary: CDK1 has protein kinase activity. This is a parent term of the 
        more specific cyclin-dependent protein serine/threonine kinase activity.
      action: ACCEPT
      reason: True but generic. The more specific cyclin-dependent protein 
        kinase activity terms are more informative.
      supported_by:
        - reference_id: PMID:22854038
          supporting_text: Aug 1. Polo-like kinase is required for synaptonemal 
            complex disassembly and phosphorylation in mouse spermatocytes.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:11298763
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
      supported_by:
        - reference_id: PMID:11298763
          supporting_text: Molecular cloning of a mammalian nuclear 
            phosphoprotein NUCKS, which serves as a substrate for Cdk1 in vivo.
  - term:
      id: GO:0016020
      label: membrane
    evidence_type: HDA
    original_reference_id: PMID:19946888
    review:
      summary: CDK1 detected in membrane fraction in proteomic analysis.
      action: KEEP_AS_NON_CORE
      reason: Membrane association is not a core localization.
      supported_by:
        - reference_id: PMID:19946888
          supporting_text: Defining the membrane proteome of NK cells.
  - term:
      id: GO:0005813
      label: centrosome
    evidence_type: IDA
    original_reference_id: PMID:17488717
    review:
      summary: CDK1 localizes to centrosomes where it is first activated at 
        mitotic entry and regulates centrosome maturation and separation.
      action: ACCEPT
      reason: Centrosomal localization is well-established and functionally 
        important for CDK1 activation and mitotic spindle organization.
      supported_by:
        - reference_id: PMID:17488717
          supporting_text: 2007 May 8. Mitotic regulation of SIRT2 by 
            cyclin-dependent kinase 1-dependent phosphorylation.
  - term:
      id: GO:0072686
      label: mitotic spindle
    evidence_type: IDA
    original_reference_id: PMID:17488717
    review:
      summary: CDK1 localizes to mitotic spindle.
      action: ACCEPT
      reason: Spindle localization is part of core mitotic function.
      supported_by:
        - reference_id: PMID:17488717
          supporting_text: 2007 May 8. Mitotic regulation of SIRT2 by 
            cyclin-dependent kinase 1-dependent phosphorylation.
  - term:
      id: GO:0004674
      label: protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:19879842
    review:
      summary: CDK1 is a serine/threonine kinase that phosphorylates S/T-P 
        motifs. This is well-established biochemically.
      action: ACCEPT
      reason: Accurate but generic. The cyclin-dependent kinase activity term 
        captures this more specifically.
      supported_by:
        - reference_id: PMID:19879842
          supporting_text: Regulation of MBK-2/DYRK by CDK-1 and the 
            pseudophosphatases EGG-4 and EGG-5 during the oocyte-to-embryo 
            transition.
  - term:
      id: GO:0030855
      label: epithelial cell differentiation
    evidence_type: IEP
    original_reference_id: PMID:21492153
    review:
      summary: CDK1 expression changes during epithelial differentiation.
      action: MARK_AS_OVER_ANNOTATED
      reason: Expression changes during differentiation do not make 
        differentiation a function of CDK1. CDK1 promotes proliferation, which 
        decreases during differentiation.
      supported_by:
        - reference_id: PMID:21492153
          supporting_text: Analysis of proteomic changes induced upon cellular 
            differentiation of the human intestinal cell line Caco-2.
  - term:
      id: GO:0070062
      label: extracellular exosome
    evidence_type: HDA
    original_reference_id: PMID:19056867
    review:
      summary: CDK1 detected in exosomes in proteomic analysis.
      action: KEEP_AS_NON_CORE
      reason: Exosomal presence is not a core function or localization.
      supported_by:
        - reference_id: PMID:19056867
          supporting_text: 2008 Dec 3. Large-scale proteomics and 
            phosphoproteomics of urinary exosomes.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170044
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170070
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170072
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170153
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170156
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170158
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170044
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170072
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170161
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170131
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-174122
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-174132
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-174251
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-2245218
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-2294600
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-380278
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-4088024
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-5195402
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-5244669
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-5692755
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-6793661
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9009282
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929514
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929533
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929535
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929717
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929719
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929720
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929721
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929884
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929904
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929935
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-NUL-2434198
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-112342
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170126
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170131
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-174104
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-174120
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-174157
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-174171
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-174227
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-174255
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-2468287
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-2468293
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-2984220
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-2990882
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-4086410
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9624800
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929532
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9929533
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-NUL-2422970
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170076
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170087
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005654
      label: nucleoplasm
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170088
    review:
      summary: CDK1 localizes to the nucleoplasm. Consistent with its nuclear 
        functions.
      action: ACCEPT
      reason: Nucleoplasm localization is well-established for CDK1.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170055
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170057
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170088
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-170116
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-2574840
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-2574845
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-3000310
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-3000319
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-380272
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-380283
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-380294
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-380303
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-380311
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-380316
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-380455
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-380508
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-5617816
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-5626220
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-5626223
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-5626227
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-5626228
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-5626681
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-5626699
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-5638009
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-6803875
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-8853405
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-8853419
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9928875
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005829
      label: cytosol
    evidence_type: TAS
    original_reference_id: Reactome:R-HSA-9928887
    review:
      summary: CDK1 localizes to the cytosol. Well-established localization.
      action: ACCEPT
      reason: Cytosolic localization is well-documented.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:11687586
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:11687586
          supporting_text: Oct 30. RGC-32 increases p34CDC2 kinase activity and 
            entry of aortic smooth muscle cells into S-phase.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:18477460
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
      supported_by:
        - reference_id: PMID:18477460
          supporting_text: Myosin phosphatase-targeting subunit 1 regulates 
            mitosis by antagonizing polo-like kinase 1.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:15148369
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:15148369
          supporting_text: Role of Polo-like kinase in the degradation of early 
            mitotic inhibitor 1, a regulator of the anaphase promoting 
            complex/cyclosome.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:18477460
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:18477460
          supporting_text: Myosin phosphatase-targeting subunit 1 regulates 
            mitosis by antagonizing polo-like kinase 1.
  - term:
      id: GO:0000226
      label: microtubule cytoskeleton organization
    evidence_type: TAS
    original_reference_id: PMID:21655336
    review:
      summary: CDK1 regulates microtubule cytoskeleton organization during 
        mitosis.
      action: ACCEPT
      reason: Part of core mitotic function.
      supported_by:
        - reference_id: PMID:21655336
          supporting_text: 'Checkpoint recovery in cells: how a molecular understanding
            can help in the fight against cancer.'
  - term:
      id: GO:0005739
      label: mitochondrion
    evidence_type: TAS
    original_reference_id: PMID:19917720
    review:
      summary: CDK1-cyclin B1 localizes to mitochondria and phosphorylates 
        mitochondrial substrates including Complex I subunits to boost ATP 
        synthesis at G2/M.
      action: ACCEPT
      reason: Mitochondrial localization of CDK1-cyclin B1 has been documented 
        with functional roles in regulating mitochondrial respiration at cell 
        cycle transitions.
      supported_by:
        - reference_id: PMID:19917720
          supporting_text: Cyclin-dependent kinase 1-mediated Bcl-xL/Bcl-2 
            phosphorylation acts as a functional link coupling mitotic arrest 
            and apoptosis.
  - term:
      id: GO:0006260
      label: DNA replication
    evidence_type: TAS
    original_reference_id: PMID:21655336
    review:
      summary: CDK1 has roles in DNA replication origin licensing, though CDK2 
        is traditionally the S-phase CDK.
      action: KEEP_AS_NON_CORE
      reason: DNA replication is a secondary function.
      supported_by:
        - reference_id: PMID:21655336
          supporting_text: 'Checkpoint recovery in cells: how a molecular understanding
            can help in the fight against cancer.'
  - term:
      id: GO:0006281
      label: DNA repair
    evidence_type: TAS
    original_reference_id: PMID:21655336
    review:
      summary: CDK1 phosphorylates DNA repair proteins including CtIP.
      action: KEEP_AS_NON_CORE
      reason: DNA repair effects are through substrate phosphorylation, not a 
        core function.
      supported_by:
        - reference_id: PMID:21655336
          supporting_text: 'Checkpoint recovery in cells: how a molecular understanding
            can help in the fight against cancer.'
  - term:
      id: GO:0007098
      label: centrosome cycle
    evidence_type: TAS
    original_reference_id: PMID:19364923
    review:
      summary: CDK1 regulates centrosome maturation and separation.
      action: ACCEPT
      reason: Centrosome regulation is part of core mitotic function.
      supported_by:
        - reference_id: PMID:19364923
          supporting_text: 'Apr 13. The decision to enter mitosis: feedback and redundancy
            in the mitotic entry network.'
  - term:
      id: GO:0007344
      label: pronuclear fusion
    evidence_type: TAS
    original_reference_id: PMID:21535261
    review:
      summary: CDK1 involvement in pronuclear fusion is documented.
      action: KEEP_AS_NON_CORE
      reason: This is a specialized cell type-specific function.
      supported_by:
        - reference_id: PMID:21535261
          supporting_text: 'Cdc2: a monopotent or pluripotent CDK? Hu X(1), Moscinski
            LC.'
  - term:
      id: GO:0014038
      label: regulation of Schwann cell differentiation
    evidence_type: TAS
    original_reference_id: PMID:17200138
    review:
      summary: CDK1 affects Schwann cell migration and differentiation.
      action: KEEP_AS_NON_CORE
      reason: Cell type-specific differentiation effects are not core function.
      supported_by:
        - reference_id: PMID:17200138
          supporting_text: Jan 2. Cdc2-mediated Schwann cell migration during 
            peripheral nerve regeneration.
  - term:
      id: GO:0016477
      label: cell migration
    evidence_type: TAS
    original_reference_id: PMID:17200138
    review:
      summary: CDK1 affects cell migration in regenerating nerves.
      action: KEEP_AS_NON_CORE
      reason: Cell migration is not a core function of CDK1.
      supported_by:
        - reference_id: PMID:17200138
          supporting_text: Jan 2. Cdc2-mediated Schwann cell migration during 
            peripheral nerve regeneration.
  - term:
      id: GO:0045995
      label: regulation of embryonic development
    evidence_type: TAS
    original_reference_id: PMID:21535261
    review:
      summary: CDK1 is required for cell division during embryonic development.
      action: KEEP_AS_NON_CORE
      reason: CDK1 is required for cell division in all contexts; embryonic 
        development per se is not a specific function.
      supported_by:
        - reference_id: PMID:21535261
          supporting_text: 'Cdc2: a monopotent or pluripotent CDK? Hu X(1), Moscinski
            LC.'
  - term:
      id: GO:0034501
      label: protein localization to kinetochore
    evidence_type: IDA
    original_reference_id: PMID:18195732
    review:
      summary: CDK1 phosphorylation promotes localization of proteins to 
        kinetochores.
      action: ACCEPT
      reason: Kinetochore function is part of CDK1's core mitotic role.
      supported_by:
        - reference_id: PMID:18195732
          supporting_text: Cyclin B1 is localized to unattached kinetochores and
            contributes to efficient microtubule attachment and proper 
            chromosome alignment during mitosis.
  - term:
      id: GO:0008353
      label: RNA polymerase II CTD heptapeptide repeat kinase activity
    evidence_type: IDA
    original_reference_id: PMID:12721286
    review:
      summary: CDK1 can phosphorylate the RNA Pol II CTD. This activity has been
        demonstrated biochemically.
      action: ACCEPT
      reason: This is a documented enzymatic activity of CDK1, though not its 
        primary function.
      supported_by:
        - reference_id: PMID:12721286
          supporting_text: 2003 Apr 28. A novel RNA polymerase II C-terminal 
            domain phosphatase that preferentially dephosphorylates serine 5.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:11574543
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:11574543
          supporting_text: 2001 Sep 26. The G2/M regulator 14-3-3sigma prevents 
            apoptosis through sequestration of Bax.
  - term:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    evidence_type: IDA
    original_reference_id: PMID:11069302
    review:
      summary: This is the most appropriate molecular function term for CDK1. 
        The enzyme requires cyclin binding for activity and phosphorylates 
        serine/threonine residues.
      action: ACCEPT
      reason: This is the core molecular function of CDK1 and accurately 
        describes its catalytic activity and cyclin-dependence.
      supported_by:
        - reference_id: PMID:11069302
          supporting_text: Regulation of apoptosis at cell division by p34cdc2 
            phosphorylation of survivin.
  - term:
      id: GO:0005515
      label: protein binding
    evidence_type: IPI
    original_reference_id: PMID:11069302
    review:
      summary: Generic protein binding annotation from interaction study.
      action: REMOVE
      reason: '"Protein binding" is uninformative per GO curation guidelines. More
        specific molecular function terms should be used.'
      supported_by:
        - reference_id: PMID:11069302
          supporting_text: Regulation of apoptosis at cell division by p34cdc2 
            phosphorylation of survivin.
  - term:
      id: GO:0005876
      label: spindle microtubule
    evidence_type: IDA
    original_reference_id: PMID:11069302
    review:
      summary: CDK1-survivin association on spindle microtubules.
      action: ACCEPT
      reason: Spindle localization is established.
      supported_by:
        - reference_id: PMID:11069302
          supporting_text: Regulation of apoptosis at cell division by p34cdc2 
            phosphorylation of survivin.
  - term:
      id: GO:0030496
      label: midbody
    evidence_type: IDA
    original_reference_id: PMID:11069302
    review:
      summary: CDK1 detected at midbody in cytokinesis context.
      action: ACCEPT
      reason: Midbody localization during cytokinesis is consistent with mitotic
        function.
      supported_by:
        - reference_id: PMID:11069302
          supporting_text: Regulation of apoptosis at cell division by p34cdc2 
            phosphorylation of survivin.
  - term:
      id: GO:0043066
      label: negative regulation of apoptotic process
    evidence_type: IDA
    original_reference_id: PMID:11069302
    review:
      summary: CDK1 phosphorylation of survivin maintains its anti-apoptotic 
        function during mitosis. However, this represents CDK1 ensuring cell 
        survival during division, not an evolved anti-apoptotic function.
      action: MARK_AS_OVER_ANNOTATED
      reason: CDK1 phosphorylates survivin to maintain cell viability during 
        mitosis - this is part of ensuring successful cell division, not a 
        dedicated anti-apoptotic function. Annotating CDK1 to apoptosis 
        regulation conflates substrate effects with core function.
      supported_by:
        - reference_id: PMID:11069302
          supporting_text: Regulation of apoptosis at cell division by p34cdc2 
            phosphorylation of survivin.
  - term:
      id: GO:0005634
      label: nucleus
    evidence_type: IDA
    original_reference_id: PMID:16109376
    review:
      summary: CDK1 localizes to the nucleus at G2 and during nuclear envelope 
        breakdown.
      action: ACCEPT
      reason: Nuclear localization is well-established for CDK1-cyclin B 
        complexes.
      supported_by:
        - reference_id: PMID:16109376
          supporting_text: The bromodomain protein Brd4 is a positive regulatory
            component of P-TEFb and stimulates RNA polymerase II-dependent 
            transcription.
  - term:
      id: GO:0004672
      label: protein kinase activity
    evidence_type: NAS
    original_reference_id: PMID:9001210
    review:
      summary: CDK1 has protein kinase activity. This is a parent term of the 
        more specific cyclin-dependent protein serine/threonine kinase activity.
      action: ACCEPT
      reason: True but generic. The more specific cyclin-dependent protein 
        kinase activity terms are more informative.
      supported_by:
        - reference_id: PMID:9001210
          supporting_text: The human Myt1 kinase preferentially phosphorylates 
            Cdc2 on threonine 14 and localizes to the endoplasmic reticulum and 
            Golgi complex.
references:
  - id: GO_REF:0000002
    title: Gene Ontology annotation through association of InterPro records with
      GO terms
    findings: []
  - id: GO_REF:0000024
    title: Manual transfer of experimentally-verified manual GO annotation data 
      to orthologs by curator judgment of sequence similarity
    findings: []
  - id: GO_REF:0000033
    title: Annotation inferences using phylogenetic trees
    findings: []
  - id: GO_REF:0000043
    title: Gene Ontology annotation based on UniProtKB/Swiss-Prot keyword 
      mapping
    findings: []
  - id: GO_REF:0000044
    title: Gene Ontology annotation based on UniProtKB/Swiss-Prot Subcellular 
      Location vocabulary mapping, accompanied by conservative changes to GO 
      terms applied by UniProt
    findings: []
  - id: GO_REF:0000052
    title: Gene Ontology annotation based on curation of immunofluorescence data
    findings: []
  - id: GO_REF:0000107
    title: Automatic transfer of experimentally verified manual GO annotation 
      data to orthologs using Ensembl Compara
    findings: []
  - id: GO_REF:0000108
    title: Automatic assignment of GO terms using logical inference, based on on
      inter-ontology links
    findings: []
  - id: GO_REF:0000116
    title: Automatic Gene Ontology annotation based on Rhea mapping
    findings: []
  - id: GO_REF:0000120
    title: Combined Automated Annotation using Multiple IEA Methods
    findings: []
  - id: PMID:10373560
    title: Overproduction of human Myt1 kinase induces a G2 cell cycle delay by 
      interfering with the intracellular trafficking of Cdc2-cyclin B1 
      complexes.
    findings: []
  - id: PMID:10791892
    title: Ser787 in the proline-rich region of human MAP4 is a critical 
      phosphorylation site that reduces its activity to promote tubulin 
      polymerization.
    findings: []
  - id: PMID:11069302
    title: Regulation of apoptosis at cell division by p34cdc2 phosphorylation 
      of survivin.
    findings: []
  - id: PMID:11298763
    title: Molecular cloning of a mammalian nuclear phosphoprotein NUCKS, which 
      serves as a substrate for Cdk1 in vivo.
    findings: []
  - id: PMID:11574543
    title: The G2/M regulator 14-3-3sigma prevents apoptosis through 
      sequestration of Bax.
    findings: []
  - id: PMID:11687586
    title: RGC-32 increases p34CDC2 kinase activity and entry of aortic smooth 
      muscle cells into S-phase.
    findings: []
  - id: PMID:12612082
    title: A novel RING finger protein, human enhancer of invasion 10, alters 
      mitotic progression through regulation of cyclin B levels.
    findings: []
  - id: PMID:12721286
    title: A novel RNA polymerase II C-terminal domain phosphatase that 
      preferentially dephosphorylates serine 5.
    findings: []
  - id: PMID:1312467
    title: Cyclin A is required at two points in the human cell cycle.
    findings: []
  - id: PMID:15148369
    title: Role of Polo-like kinase in the degradation of early mitotic 
      inhibitor 1, a regulator of the anaphase promoting complex/cyclosome.
    findings: []
  - id: PMID:15657067
    title: Phosphotyrosine signaling networks in epidermal growth factor 
      receptor overexpressing squamous carcinoma cells.
    findings: []
  - id: PMID:15767402
    title: Human papillomavirus type 16 E1 E4-induced G2 arrest is associated 
      with cytoplasmic retention of active Cdk1/cyclin B1 complexes.
    findings: []
  - id: PMID:16109376
    title: The bromodomain protein Brd4 is a positive regulatory component of 
      P-TEFb and stimulates RNA polymerase II-dependent transcription.
    findings: []
  - id: PMID:17200138
    title: Cdc2-mediated Schwann cell migration during peripheral nerve 
      regeneration.
    findings: []
  - id: PMID:17283331
    title: Death-effector domain-containing protein DEDD is an inhibitor of 
      mitotic Cdk1/cyclin B1.
    findings: []
  - id: PMID:17349584
    title: Fez1/Lzts1 absence impairs Cdk1/Cdc25C interaction during mitosis and
      predisposes mice to cancer development.
    findings: []
  - id: PMID:17488717
    title: Mitotic regulation of SIRT2 by cyclin-dependent kinase 1-dependent 
      phosphorylation.
    findings: []
  - id: PMID:17495531
    title: Cyclin B and cyclin A confer different substrate recognition 
      properties on CDK2.
    findings: []
  - id: PMID:17681274
    title: 'Cell death in leukemia: passenger protein regulation by topoisomerase
      inhibitors.'
    findings: []
  - id: PMID:18195732
    title: Cyclin B1 is localized to unattached kinetochores and contributes to 
      efficient microtubule attachment and proper chromosome alignment during 
      mitosis.
    findings: []
  - id: PMID:18337751
    title: cdc2-cyclin B regulates eEF2 kinase activity in a cell cycle- and 
      amino acid-dependent manner.
    findings: []
  - id: PMID:18408765
    title: CDK1 promotes cell proliferation and survival via phosphorylation and
      inhibition of FOXO1 transcription factor.
    findings: []
  - id: PMID:18477460
    title: Myosin phosphatase-targeting subunit 1 regulates mitosis by 
      antagonizing polo-like kinase 1.
    findings: []
  - id: PMID:19056867
    title: Large-scale proteomics and phosphoproteomics of urinary exosomes.
    findings: []
  - id: PMID:19135898
    title: Purification of proteins associated with specific genomic Loci.
    findings: []
  - id: PMID:19202191
    title: Human CtIP mediates cell cycle control of DNA end resection and 
      double strand break repair.
    findings: []
  - id: PMID:19364923
    title: 'The decision to enter mitosis: feedback and redundancy in the mitotic
      entry network.'
    findings: []
  - id: PMID:19879842
    title: Regulation of MBK-2/DYRK by CDK-1 and the pseudophosphatases EGG-4 
      and EGG-5 during the oocyte-to-embryo transition.
    findings: []
  - id: PMID:19917720
    title: Cyclin-dependent kinase 1-mediated Bcl-xL/Bcl-2 phosphorylation acts 
      as a functional link coupling mitotic arrest and apoptosis.
    findings: []
  - id: PMID:19946888
    title: Defining the membrane proteome of NK cells.
    findings: []
  - id: PMID:20395957
    title: New Cdc2 Tyr 4 phosphorylation by dsRNA-activated protein kinase 
      triggers Cdc2 polyubiquitination and G2 arrest under genotoxic stresses.
    findings: []
  - id: PMID:21041660
    title: Cell division cycle 6, a mitotic substrate of polo-like kinase 1, 
      regulates chromosomal segregation mediated by cyclin-dependent kinase 1 
      and separase.
    findings: []
  - id: PMID:21492153
    title: Analysis of proteomic changes induced upon cellular differentiation 
      of the human intestinal cell line Caco-2.
    findings: []
  - id: PMID:21535261
    title: 'Cdc2: a monopotent or pluripotent CDK?'
    findings: []
  - id: PMID:21655336
    title: 'Checkpoint recovery in cells: how a molecular understanding can help in
      the fight against cancer.'
    findings: []
  - id: PMID:21871177
    title: Ribosomal protein S3 is phosphorylated by Cdk1/cdc2 during G2/M 
      phase.
    findings: []
  - id: PMID:2188730
    title: Identification of cell cycle-regulated phosphorylation sites on 
      nuclear lamin C.
    findings: []
  - id: PMID:22411829
    title: M phase phosphorylation of the epigenetic regulator UHRF1 regulates 
      its physical association with the deubiquitylase USP7 and stability.
    findings: []
  - id: PMID:22854038
    title: Polo-like kinase is required for synaptonemal complex disassembly and
      phosphorylation in mouse spermatocytes.
    findings: []
  - id: PMID:2344612
    title: Mutations of phosphorylation sites in lamin A that prevent nuclear 
      lamina disassembly in mitosis.
    findings: []
  - id: PMID:23509069
    title: MISP is a novel Plk1 substrate required for proper spindle 
      orientation and mitotic progression.
    findings: []
  - id: PMID:23543736
    title: Ubiquitin C-terminal hydrolase L1 (UCH-L1) acts as a novel 
      potentiator of cyclin-dependent kinases to enhance cell proliferation 
      independently of its hydrolase activity.
    findings: []
  - id: PMID:23574715
    title: The novel actin/focal adhesion-associated protein MISP is involved in
      mitotic spindle positioning in human cells.
    findings: []
  - id: PMID:23601106
    title: The retroviral restriction ability of SAMHD1, but not its 
      deoxynucleotide triphosphohydrolase activity, is regulated by 
      phosphorylation.
    findings: []
  - id: PMID:23602568
    title: The protein interaction landscape of the human CMGC kinase group.
    findings: []
  - id: PMID:23799914
    title: Sulforaphane induced cell cycle arrest in the G2/M phase via the 
      blockade of cyclin B1/CDC2 in human ovarian cancer cells.
    findings: []
  - id: PMID:24218572
    title: CDK10/cyclin M is a protein kinase that controls ETS2 degradation and
      is deficient in STAR syndrome.
    findings: []
  - id: PMID:24358021
    title: Polycomb protein SCML2 regulates the cell cycle by binding and 
      modulating CDK/CYCLIN/p21 complexes.
    findings: []
  - id: PMID:24658140
    title: The mammalian-membrane two-hybrid assay (MaMTH) for probing 
      membrane-protein interactions in human cells.
    findings: []
  - id: PMID:24746669
    title: Cyclin B1/Cdk1 coordinates mitochondrial respiration for cell-cycle 
      G2/M progression.
    findings: []
  - id: PMID:25012651
    title: Ki67 antigen contributes to the timely accumulation of protein 
      phosphatase 1Ξ³ on anaphase chromosomes.
    findings: []
  - id: PMID:25218637
    title: RASSF1A-LATS1 signalling stabilizes replication forks by restricting 
      CDK2-mediated phosphorylation ofΒ BRCA2.
    findings: []
  - id: PMID:25416956
    title: A proteome-scale map of the human interactome network.
    findings: []
  - id: PMID:25753036
    title: Cdk1 phosphorylates SPAT-1/Bora to trigger PLK-1 activation and drive
      mitotic entry in C. elegans embryos.
    findings: []
  - id: PMID:25852190
    title: Integrative analysis of kinase networks in TRAIL-induced apoptosis 
      provides a source of potential targets for combination therapy.
    findings: []
  - id: PMID:26496610
    title: A human interactome in three quantitative dimensions organized by 
      stoichiometries and abundances.
    findings: []
  - id: PMID:26808496
    title: Comparative Proteomics Reveals Important Viral-Host Interactions in 
      HCV-Infected Human Liver Cells.
    findings: []
  - id: PMID:26829474
    title: Acetylation of Aurora B by TIP60 ensures accurate chromosomal 
      segregation.
    findings: []
  - id: PMID:27030108
    title: Phosphorylation of EB2 by Aurora B and CDK1 ensures mitotic 
      progression and genome stability.
    findings: []
  - id: PMID:27238018
    title: Circadian Amplitude Regulation via FBXW7-Targeted REV-ERBΞ± 
      Degradation.
    findings: []
  - id: PMID:27626412
    title: Sulforaphane, a Dietary Isothiocyanate, Induces Gβ‚‚/M Arrest in 
      Cervical Cancer Cells through CyclinB1 Downregulation and GADD45Ξ²/CDC2 
      Association.
    findings: []
  - id: PMID:27880917
    title: Phenotypic and Interaction Profiling of the Human Phosphatases 
      Identifies Diverse Mitotic Regulators.
    findings: []
  - id: PMID:28479321
    title: Ska3 Phosphorylated by Cdk1 Binds Ndc80 and Recruits Ska to 
      Kinetochores to Promote Mitotic Progression.
    findings: []
  - id: PMID:28514442
    title: Architecture of the human interactome defines protein communities and
      disease networks.
    findings: []
  - id: PMID:28575661
    title: RECQ5 Helicase Cooperates with MUS81 Endonuclease in Processing 
      Stalled Replication Forks at Common Fragile Sites during Mitosis.
    findings: []
  - id: PMID:29128334
    title: A Map of Human Mitochondrial Protein Interactions Linked to 
      Neurodegeneration Reveals New Mechanisms of Redox Homeostasis and NF-ΞΊB 
      Signaling.
    findings: []
  - id: PMID:30139873
    title: An intrinsic S/G(2) checkpoint enforced by ATR.
    findings: []
  - id: PMID:30833792
    title: A protein-interaction network of interferon-stimulated genes extends 
      the innate immune system landscape.
    findings: []
  - id: PMID:31279575
    title: Phosphorylation of Ci/Gli by Fused Family Kinases Promotes Hedgehog 
      Signaling.
    findings: []
  - id: PMID:31804178
    title: Molecular determinants of the Ska-Ndc80 interaction and their 
      influence on microtubule tracking and force-coupling.
    findings: []
  - id: PMID:31980649
    title: Extensive rewiring of the EGFR network in colorectal cancer cells 
      expressing transforming levels of KRAS(G13D).
    findings: []
  - id: PMID:32491969
    title: Multisite phosphorylation determines the formation of Ska-Ndc80 
      macro-complexes that are essential for chromosome segregation during 
      mitosis.
    findings: []
  - id: PMID:32707033
    title: Kinase Interaction Network Expands Functional and Disease Roles of 
      Human Kinases.
    findings: []
  - id: PMID:32814053
    title: Interactome Mapping Provides a Network of Neurodegenerative Disease 
      Proteins and Uncovers Widespread Protein Aggregation in Affected Brains.
    findings: []
  - id: PMID:33037310
    title: The sequence at Spike S1/S2 site enables cleavage by furin and 
      phospho-regulation in SARS-CoV2 but not in SARS-CoV1 or MERS-CoV.
    findings: []
  - id: PMID:33961781
    title: Dual proteome-scale networks reveal cell-specific remodeling of the 
      human interactome.
    findings: []
  - id: PMID:34591612
    title: A protein interaction landscape of breast cancer.
    findings: []
  - id: PMID:34734636
    title: Mitotic chromosome condensation requires phosphorylation of the 
      centromeric protein KNL-2 in C. elegans.
    findings: []
  - id: PMID:34741373
    title: CDK1/FBXW7 facilitates degradation and ubiquitination of MLST8 to 
      inhibit progression of renal cell carcinoma.
    findings: []
  - id: PMID:35271311
    title: 'OpenCell: Endogenous tagging for the cartography of human cellular organization.'
    findings: []
  - id: PMID:37788673
    title: ATR promotes clearance of damaged DNA and damaged cells by rupturing 
      micronuclei.
    findings: []
  - id: PMID:40440427
    title: ASB7 is a negative regulator of H3K9me3 homeostasis.
    findings: []
  - id: PMID:7588608
    title: 'ERF: an ETS domain protein with strong transcriptional repressor activity,
      can suppress ets-associated tumorigenesis and is regulated by phosphorylation
      during cell cycle and mitogenic stimulation.'
    findings: []
  - id: PMID:7739547
    title: Novel INK4 proteins, p19 and p18, are specific inhibitors of the 
      cyclin D-dependent kinases CDK4 and CDK6.
    findings: []
  - id: PMID:7815540
    title: Simian virus 40 large T antigen affects the Saccharomyces cerevisiae 
      cell cycle and interacts with p34CDC28.
    findings: []
  - id: PMID:9001210
    title: The human Myt1 kinase preferentially phosphorylates Cdc2 on threonine
      14 and localizes to the endoplasmic reticulum and Golgi complex.
    findings: []
  - id: PMID:9988268
    title: Human homologue of the Drosophila melanogaster lats tumour suppressor
      modulates CDC2 activity.
    findings: []
  - id: Reactome:R-HSA-110056
    title: MAPK3 (ERK1) activation
    findings: []
  - id: Reactome:R-HSA-112342
    title: Inactivation of MAP2K1 by CDK1
    findings: []
  - id: Reactome:R-HSA-170044
    title: Translocation of Cyclin B1:phospho-Cdc2 complexes to the nucleus
    findings: []
  - id: Reactome:R-HSA-170055
    title: Myt-1 mediated phosphorylation of Cyclin B:Cdc2 complexes
    findings: []
  - id: Reactome:R-HSA-170057
    title: Formation of Cyclin B:Cdc2 complexes
    findings: []
  - id: Reactome:R-HSA-170070
    title: Wee1-mediated phosphorylation of Cyclin B1:phospho-Cdc2 complexes
    findings: []
  - id: Reactome:R-HSA-170072
    title: Translocation of Cyclin B1:phospho-Cdc2 to the cytoplasm
    findings: []
  - id: Reactome:R-HSA-170076
    title: CAK phosphorylates CDK1 bound to CCNB1
    findings: []
  - id: Reactome:R-HSA-170087
    title: CAK phosphorylates CDK1 bound to CCNA
    findings: []
  - id: Reactome:R-HSA-170088
    title: Translocation of CCNA:p-T14-CDK1 to the nucleus
    findings: []
  - id: Reactome:R-HSA-170116
    title: PKMYT1 phosphorylates CCNA:CDK1
    findings: []
  - id: Reactome:R-HSA-170126
    title: Phosphorylation of Cyclin B1 in the CRS domain
    findings: []
  - id: Reactome:R-HSA-170131
    title: Translocation of CRS phosphorylated Cyclin B1:Cdc2 complexes
    findings: []
  - id: Reactome:R-HSA-170153
    title: Dephosphorylation of nuclear Cyclin B1:phospho-Cdc2 (Thr 14, Tyr15) 
      complexes by Cdc25 phosphatases
    findings: []
  - id: Reactome:R-HSA-170156
    title: WEE1 phosphorylates CCNA:CDK1
    findings: []
  - id: Reactome:R-HSA-170158
    title: CDC25A dephosphorylates CCNA:CDK1
    findings: []
  - id: Reactome:R-HSA-170161
    title: Dephosphorylation of cytoplasmic Cyclin B1/B2:phospho-Cdc2 (Thr 14, 
      Tyr 15) complexes by CDC25B
    findings: []
  - id: Reactome:R-HSA-174104
    title: Ubiquitination of Cyclin A by APC/C:Cdc20 complex
    findings: []
  - id: Reactome:R-HSA-174120
    title: Association of Cyclin B:Cdc2 with Cdc20:APC/C complex
    findings: []
  - id: Reactome:R-HSA-174122
    title: Phosphorylation of the Emi1 DSGxxS degron by Cyclin B:Cdc2
    findings: []
  - id: Reactome:R-HSA-174132
    title: Free APC/C phosphorylated by Cyclin B:Cdc2
    findings: []
  - id: Reactome:R-HSA-174157
    title: Degradation of multiubiquitinated Cyclin B
    findings: []
  - id: Reactome:R-HSA-174171
    title: Association of Cyclin A with the APC/C
    findings: []
  - id: Reactome:R-HSA-174227
    title: Ubiquitination of Cyclin B by phospho-APC/C:Cdc20 complex
    findings: []
  - id: Reactome:R-HSA-174251
    title: Phosphorylation of Cdh1 by Cyclin B1:Cdc2
    findings: []
  - id: Reactome:R-HSA-174255
    title: Degradation multiubiquitinated Cyclin A
    findings: []
  - id: Reactome:R-HSA-2245218
    title: CDK1 phosphorylates PHF8
    findings: []
  - id: Reactome:R-HSA-2294600
    title: CDK1 phosphorylates condensin II subunit NCAPD3
    findings: []
  - id: Reactome:R-HSA-2468287
    title: CDK1 phosphorylates CDCA5 (Sororin) at centromeres
    findings: []
  - id: Reactome:R-HSA-2468293
    title: CDK1 phosphorylates CDCA5 (Sororin) at chromosomal arms
    findings: []
  - id: Reactome:R-HSA-2574840
    title: AJUBA facilitates AURKA autophosphorylation
    findings: []
  - id: Reactome:R-HSA-2574845
    title: AJUBA binds centrosome-associated AURKA
    findings: []
  - id: Reactome:R-HSA-2984220
    title: CDK1:CCNB phosphorylates NEK9
    findings: []
  - id: Reactome:R-HSA-2990882
    title: CDK1 phosphorylates NUP98
    findings: []
  - id: Reactome:R-HSA-3000310
    title: AURKA phosphorylates PLK1
    findings: []
  - id: Reactome:R-HSA-3000319
    title: BORA binds PLK1 and AURKA
    findings: []
  - id: Reactome:R-HSA-380272
    title: Plk1-mediated phosphorylation of Nlp
    findings: []
  - id: Reactome:R-HSA-380278
    title: CCNB1:p-T160-CDK1 phosphorylates NUMA1
    findings: []
  - id: Reactome:R-HSA-380283
    title: Recruitment of additional gamma tubulin/ gamma TuRC to the centrosome
    findings: []
  - id: Reactome:R-HSA-380294
    title: Loss of C-Nap-1 from centrosomes
    findings: []
  - id: Reactome:R-HSA-380303
    title: Dissociation of Phospho-Nlp from the centrosome
    findings: []
  - id: Reactome:R-HSA-380311
    title: Recruitment of Plk1 to centrosomes
    findings: []
  - id: Reactome:R-HSA-380316
    title: Association of NuMA with microtubules
    findings: []
  - id: Reactome:R-HSA-380455
    title: Recruitment of CDK11p58 to the centrosomes
    findings: []
  - id: Reactome:R-HSA-380508
    title: Translocation of NuMA to the centrosomes
    findings: []
  - id: Reactome:R-HSA-4086410
    title: CCNB:CDK1 phosphorylates BORA
    findings: []
  - id: Reactome:R-HSA-4088024
    title: CCNA:CDK1/2 complexes and CCNB1:CDK1 complexes phosphorylate FOXM1
    findings: []
  - id: Reactome:R-HSA-5195402
    title: CDK1 phosphorylates LPIN
    findings: []
  - id: Reactome:R-HSA-5244669
    title: CDK1 phosphorylates lamins and facilitates depolymerization of lamin 
      filaments
    findings: []
  - id: Reactome:R-HSA-5617816
    title: RAB3IP stimulates nucleotide exchange on RAB8A
    findings: []
  - id: Reactome:R-HSA-5626220
    title: C2CD3 binds the mother centriole
    findings: []
  - id: Reactome:R-HSA-5626223
    title: C2CD3 and OFD1 recruit 5 distal appendage proteins to the centriole
    findings: []
  - id: Reactome:R-HSA-5626227
    title: CP110 and CEP97 dissociate from the centriole
    findings: []
  - id: Reactome:R-HSA-5626228
    title: The distal appendage proteins recruit TTBK2
    findings: []
  - id: Reactome:R-HSA-5626681
    title: Recruitment of transition zone proteins
    findings: []
  - id: Reactome:R-HSA-5626699
    title: MARK4 binds ODF2 in the centriole
    findings: []
  - id: Reactome:R-HSA-5638009
    title: CEP164 recruits RAB3IP-carrying Golgi-derived vesicles to the basal 
      body
    findings: []
  - id: Reactome:R-HSA-5688426
    title: Deubiquitination
    findings: []
  - id: Reactome:R-HSA-5692755
    title: CDK1 phosphorylates MAPK6
    findings: []
  - id: Reactome:R-HSA-6793661
    title: (CDK1,CDK2):CCNA phosphorylates MDM2 at T218
    findings: []
  - id: Reactome:R-HSA-6803875
    title: SFN dimer binds CDK1 and CCNB1
    findings: []
  - id: Reactome:R-HSA-69275
    title: G2/M Transition
    findings: []
  - id: Reactome:R-HSA-8853405
    title: TPX2 binds AURKA at centrosomes
    findings: []
  - id: Reactome:R-HSA-8853419
    title: TPX2 promotes AURKA autophosphorylation
    findings: []
  - id: Reactome:R-HSA-8940100
    title: CDK1 phosphorylates VCPIP1
    findings: []
  - id: Reactome:R-HSA-9009282
    title: CDK1 phosphorylates RUNX2
    findings: []
  - id: Reactome:R-HSA-9624800
    title: CDK1 phosphorylates LBR
    findings: []
  - id: Reactome:R-HSA-9836184
    title: p-PKR dimer phosphorylates CDK1
    findings: []
  - id: Reactome:R-HSA-9928875
    title: Formation of CCNA1:CDK1 complex
    findings: []
  - id: Reactome:R-HSA-9928887
    title: Formation of CCNA2:CDK1 complex
    findings: []
  - id: Reactome:R-HSA-9929514
    title: CDK1 phosphorylates CCNA
    findings: []
  - id: Reactome:R-HSA-9929532
    title: CCNA:CDK1 phosphorylates BORA
    findings: []
  - id: Reactome:R-HSA-9929533
    title: CCNA:CDK1 complex translocates to the cytosol
    findings: []
  - id: Reactome:R-HSA-9929535
    title: CCNA:CDK1 phosphorylates WEE1
    findings: []
  - id: Reactome:R-HSA-9929717
    title: CCNA:CDK1 phosphorylates FZR1
    findings: []
  - id: Reactome:R-HSA-9929719
    title: CCNA:CDK1 phosphorylates TICRR
    findings: []
  - id: Reactome:R-HSA-9929720
    title: CCNA:CDK1 phosphorylates OBI1
    findings: []
  - id: Reactome:R-HSA-9929721
    title: CCNA:CDK1 phosphorylates SGO1
    findings: []
  - id: Reactome:R-HSA-9929884
    title: CCNA:CDK1 phosphorylates HJURP
    findings: []
  - id: Reactome:R-HSA-9929904
    title: CCNA:CDK1 phosphorylates MIS18BP1
    findings: []
  - id: Reactome:R-HSA-9929935
    title: CCNA:CDK1 phosphorylates CDC25B
    findings: []
  - id: Reactome:R-NUL-2422970
    title: Phosphorylation of Gorasp1, Golga2 and RAB1A by CDK1:CCNB
    findings: []
  - id: Reactome:R-NUL-2434198
    title: CDK1 phosphorylates Mastl
    findings: []
  - id: file:human/CDK1/CDK1-deep-research-falcon.md
    title: Deep research report on CDK1
    findings: []

core_functions:
  - molecular_function:
      id: GO:0004693
      label: cyclin-dependent protein serine/threonine kinase activity
    description: >-
      CDK1 is the essential cyclin-dependent kinase for cell division. It forms
      holoenzyme complexes with cyclin B1 (principally) or cyclin A, and with CKS1/2
      phospho-adaptors. CDK1 phosphorylates substrates on S/T-P motifs and drives
      the G2/M transition by phosphorylating over 1000 substrates including lamins,
      condensins, and numerous mitotic machinery proteins.
    directly_involved_in:
      - id: GO:0000086
        label: G2/M transition of mitotic cell cycle
      - id: GO:0051301
        label: cell division
      - id: GO:0007077
        label: mitotic nuclear membrane disassembly
      - id: GO:0030261
        label: chromosome condensation
    locations:
      - id: GO:0005634
        label: nucleus
      - id: GO:0005813
        label: centrosome
      - id: GO:0072686
        label: mitotic spindle
    in_complex:
      id: GO:0000307
      label: cyclin-dependent protein kinase holoenzyme complex

suggested_questions:
  - question: >-
      Should CDK1 be annotated to apoptotic process given that it phosphorylates
      survivin and other apoptosis regulators? Review consensus is NO - this is
      over-annotation. CDK1 phosphorylates over 1000 substrates as part of its cell
      cycle function. Phosphorylating apoptosis regulators to maintain cell viability
      during division is not the same as having apoptosis as an evolved function.
  - question: >-
      How should the extensive Reactome pathway annotations resulting in many
      duplicate localization terms be handled? Multiple Reactome pathway references
      for the same localization term create redundancy but add evidence.