CAMK2A encodes the alpha subunit of Ca2+/calmodulin-dependent protein kinase II (CaMKII), a multifunctional Ser/Thr protein kinase that serves as a molecular switch in synaptic plasticity and memory formation. CaMKIIΞ± is highly enriched in the brain, particularly at excitatory synapses, where it responds to calcium influx through NMDA receptors. Upon Ca2+/calmodulin binding, the kinase undergoes autophosphorylation at Thr286, generating Ca2+-independent activity that persists after calcium levels return to baseline - effectively storing a molecular memory of synaptic activity. The kinase forms dodecameric holoenzymes that phosphorylate numerous synaptic substrates including glutamate receptors, thereby strengthening synaptic transmission during long-term potentiation. Mutations in CAMK2A cause intellectual disability (MRD53) and are associated with autism spectrum disorder, highlighting its critical role in cognitive development and function.
| GO Term | Evidence | Action | Reason |
|---|---|---|---|
| GO:0004683 calcium/calmodulin-dependent protein kinase activity | IBA GO_REF:0000033 | ACCEPT | Summary: Core molecular function strongly supported by extensive biochemical and functional evidence. Multiple studies demonstrate direct Ca2+/calmodulin-dependent kinase activity. IBA annotation from phylogenetic inference is at the correct level of specificity. Reason: This is the fundamental molecular function of CAMK2A, supported by decades of biochemical characterization and phylogenetic conservation across metazoans. The IBA annotation correctly captures the Ca2+/calmodulin-dependent aspect that distinguishes CAMK2A from other kinases. Supporting Evidence: PMID:11972023 CaMKII can interact directly with Stat1 and phosphorylate Stat1 on S727 in vitro . Inhibition of Ca 2+ flux or CaMKII results in a lack of S727 phosphorylation |
| GO:0004672 protein kinase activity | IEA GO_REF:0000002 | ACCEPT | Summary: General protein kinase activity is correct but too broad. The more specific Ca2+/calmodulin-dependent kinase activity (GO:0004683) better captures the core function. Reason: While broad, this annotation is correct and represents the parent term of the more specific calcium/calmodulin-dependent protein kinase activity. IEA annotations from InterPro domains are appropriate for capturing general molecular functions based on conserved domains. |
| GO:0004683 calcium/calmodulin-dependent protein kinase activity | IEA GO_REF:0000120 | ACCEPT | Summary: Duplicate annotation with different evidence code. The core function is already captured by the IBA annotation above with stronger evidence. Reason: While duplicate, IEA annotations from combined methods provide computational support. Having multiple evidence lines for the same core function is acceptable in GO annotation practice. |
| GO:0000166 nucleotide binding | IEA GO_REF:0000043 | MODIFY | Summary: General nucleotide binding is implied by kinase activity but too broad. More specific ATP binding (GO:0005524) would be more appropriate for a kinase. Reason: All protein kinases require ATP binding for catalytic activity. The annotation should be more specific to ATP binding rather than general nucleotide binding. Proposed replacements: ATP binding |
| GO:0004674 protein serine/threonine kinase activity | IEA GO_REF:0000043 | ACCEPT | Summary: Correct Ser/Thr kinase activity. While the Ca2+/calmodulin-dependent aspect (GO:0004683) is more specific, this annotation correctly identifies the type of amino acids phosphorylated. Reason: CAMK2A is indeed a serine/threonine kinase, phosphorylating these residues on substrates like AMPA receptors (S831 on GluA1), NMDA receptors (S1303 on GluN2B), and STAT1 (S727). This is a correct molecular function annotation. Supporting Evidence: PMID:11972023 CaMKII can interact directly with Stat1 and phosphorylate Stat1 on S727 in vitro . Inhibition of Ca 2+ flux or CaMKII results in a lack of S727 phosphorylation |
| GO:0005515 protein binding | IPI PMID:19453375 Phosphorylation status of the NR2B subunit of NMDA receptor ... | MODIFY | Summary: PMID:19453375 describes CaMKII interaction with NMDAR NR2B (GluN2B) subunit, a critical synaptic interaction for LTP. Should be annotated more specifically. Reason: The paper specifically demonstrates interaction with NMDA receptor subunit NR2B, which is essential for synaptic targeting and LTP. Generic protein binding doesn't capture this important functional interaction. Proposed replacements: ionotropic glutamate receptor binding Supporting Evidence: PMID:19453375 Phosphorylation status of the NR2B subunit of NMDA receptor regulates its interaction with calcium/calmodulin-dependent protein kinase II |
| GO:0005515 protein binding | IPI PMID:20668654 Structure of the CaMKIIdelta/calmodulin complex reveals the ... | MODIFY | Summary: PMID:20668654 describes CaMKII/calmodulin complex structure. Calmodulin binding is already implicit in the Ca2+/calmodulin-dependent kinase activity annotation. Reason: While calmodulin binding is implicit in the kinase activity, explicit annotation of calmodulin binding provides mechanistic detail about regulation. Proposed replacements: calmodulin binding Supporting Evidence: PMID:20668654 Structure of the CaMKIIdelta/calmodulin complex reveals the molecular mechanism of CaMKII kinase activation |
| GO:0005515 protein binding | IPI PMID:22939624 Quantitative analysis of HSP90-client interactions reveals p... | REMOVE | Summary: PMID:22939624 is a quantitative analysis of HSP90 client proteins. While CAMK2A may interact with HSP90 for folding/stability, this is not a core synaptic function. Reason: HSP90 interactions are general cellular housekeeping functions not specific to CAMK2A's core role in synaptic plasticity. This high-throughput study doesn't provide functional context for the interaction. Supporting Evidence: PMID:22939624 Quantitative analysis of HSP90-client interactions reveals principles of substrate recognition. |
| GO:0005515 protein binding | IPI PMID:25852190 Integrative analysis of kinase networks in TRAIL-induced apo... | REMOVE | Summary: High-throughput kinase network analysis in TRAIL-induced apoptosis. Not relevant to CAMK2A's core neuronal functions. Reason: This is a cancer cell line study of apoptosis pathways, not relevant to CAMK2A's primary role in neurons. Generic protein binding from high-throughput studies without functional validation should not be annotated. 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:27173435 An organelle-specific protein landscape identifies novel dis... | REMOVE | Summary: Large-scale organelle proteomics study mapping protein localization. Not functionally relevant to CAMK2A's synaptic roles. Reason: High-throughput proteomics without functional validation. Generic protein binding annotations from such studies dilute meaningful functional annotations. Supporting Evidence: PMID:27173435 An organelle-specific protein landscape identifies novel diseases and molecular mechanisms. |
| GO:0005515 protein binding | IPI PMID:29426014 Network Analysis of UBE3A/E6AP-Associated Proteins Provides ... | REMOVE | Summary: UBE3A network analysis. Not central to CAMK2A core function. Supporting Evidence: PMID:29426014 2018 Feb 6. Network Analysis of UBE3A/E6AP-Associated Proteins Provides Connections to Several Distinct Cellular Processes. |
| GO:0005515 protein binding | IPI PMID:31980649 Extensive rewiring of the EGFR network in colorectal cancer ... | REMOVE | Summary: Large-scale interactome study. General protein binding annotations from high-throughput studies are not specific to core CAMK2A functions. 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:32296183 A reference map of the human binary protein interactome. | REMOVE | Summary: Human reference interactome map. High-throughput data, not specific to CAMK2A core function. Supporting Evidence: PMID:32296183 Apr 8. A reference map of the human binary protein interactome. |
| GO:0005515 protein binding | IPI PMID:32707033 Kinase Interaction Network Expands Functional and Disease Ro... | REMOVE | Summary: Kinase interaction network study. While informative for kinase networks, generic protein binding is not core. 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: Neurodegenerative disease protein interactome. Not specific to CAMK2A core function. Supporting Evidence: PMID:32814053 Interactome Mapping Provides a Network of Neurodegenerative Disease Proteins and Uncovers Widespread Protein Aggregation in Affected Brains. |
| GO:0004683 calcium/calmodulin-dependent protein kinase activity | IDA PMID:35568036 A family of conserved bacterial virulence factors dampens in... | ACCEPT | Summary: Direct experimental evidence showing Ca2+/calmodulin-dependent kinase activity in the context of interferon signaling. Strong support for core molecular function. Reason: Direct assay evidence demonstrating calcium/calmodulin-dependent kinase activity. This study shows how bacterial factors interfere with CaMKII activation by blocking calcium signaling. Supporting Evidence: PMID:35568036 A family of conserved bacterial virulence factors dampens interferon responses by blocking calcium signaling |
| GO:0004683 calcium/calmodulin-dependent protein kinase activity | IDA PMID:11972023 Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphoryla... | ACCEPT | Summary: Direct biochemical evidence of CaMKII's Ca2+/calmodulin-dependent kinase activity phosphorylating STAT1 at Ser727. Core molecular function. Reason: This paper provides direct biochemical evidence that CaMKII requires Ca2+ and calmodulin for its kinase activity, and that it directly phosphorylates STAT1 in response to IFN-gamma. Supporting Evidence: PMID:11972023 CaMKII can interact directly with Stat1 and phosphorylate Stat1 on S727 in vitro . Inhibition of Ca 2+ flux or CaMKII results in a lack of S727 phosphorylation |
| GO:0004683 calcium/calmodulin-dependent protein kinase activity | TAS PMID:11972023 Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphoryla... | ACCEPT | Summary: TAS (Traceable Author Statement) annotation from same paper as IDA above. Duplicate evidence for same function. Reason: TAS annotations represent author statements about protein function. While duplicate with the IDA annotation from the same paper, having multiple evidence codes for core functions is acceptable in GO practice. Supporting Evidence: PMID:11972023 Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphorylation in response to IFN-gamma. |
| GO:0007259 cell surface receptor signaling pathway via JAK-STAT | IDA PMID:11972023 Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphoryla... | KEEP AS NON CORE | Summary: CAMK2A phosphorylates STAT1 at Ser727 in response to IFN-gamma, participating in JAK-STAT signaling. Well-documented but not primary neuronal function. Reason: While CAMK2A does participate in JAK-STAT signaling through STAT1 phosphorylation, this represents a non-neuronal immune signaling function that is peripheral to its core role in synaptic plasticity. The evidence is solid but the function is context-dependent. Supporting Evidence: PMID:11972023 IFN-Ξ³ induced a rapid and sharp increase in [Ca 2+ ] i in a dose-dependent manner (Fig |
| GO:0071346 cellular response to type II interferon | IDA PMID:11972023 Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphoryla... | KEEP AS NON CORE | Summary: Response to IFN-gamma (type II interferon) via STAT1 Ser727 phosphorylation. Well-documented but peripheral to neuronal functions. Reason: CAMK2A is activated by IFN-gamma-induced calcium flux and phosphorylates STAT1 for transcriptional activation. This immune signaling function is real but not central to CAMK2A's primary role in synaptic plasticity. Supporting Evidence: PMID:11972023 IFN-Ξ³ induced a rapid and sharp increase in [Ca 2+ ] i in a dose-dependent manner (Fig |
| GO:0004674 protein serine/threonine kinase activity | IDA PMID:28130356 A Novel Human CAMK2A Mutation Disrupts Dendritic Morphology ... | ACCEPT | Summary: Direct experimental evidence of Ser/Thr kinase activity from autism-associated CAMK2A mutation study showing phosphorylation of synaptic substrates. Reason: Strong direct evidence showing CAMK2A phosphorylates Ser/Thr residues on multiple synaptic substrates. The E183V mutation reduces substrate phosphorylation, confirming kinase activity. Supporting Evidence: PMID:28130356 decreases both CaMKIIΞ± substrate phosphorylation and regulatory autophosphorylation, and that the mutated kinase acts in a dominant-negative manner |
| GO:0005515 protein binding | IPI PMID:28130356 A Novel Human CAMK2A Mutation Disrupts Dendritic Morphology ... | MODIFY | Summary: PMID:28130356 demonstrates CAMK2A interactions with critical synaptic proteins including Shank3 (postsynaptic scaffold), GRIN2B (NMDAR subunit), CACNB2 (L-type Ca channel), and LRRC7 (dendritic protein). Reason: These are functionally important synaptic interactions that should be annotated more specifically. Shank3 and NMDAR interactions are essential for postsynaptic organization and LTP. Proposed replacements: ionotropic glutamate receptor binding scaffold protein binding Supporting Evidence: PMID:28130356 CaMKIIΞ± phosphorylates NMDA ( Omkumar et al., 1996 ; Leonard et al., 1999 ; Strack et al., 2000 ) and AMPA ( Barria et al., 1997b ; Mammen et al., 1997 ; Coultrap et al., 2014 ) receptor subunits to enhance excitatory synaptic transmission |
| GO:0004674 protein serine/threonine kinase activity | ISS GO_REF:0000024 | ACCEPT | Summary: Inferred from sequence similarity to experimentally characterized orthologs. Correct molecular function annotation. Reason: ISS annotations based on manual ortholog analysis are reliable. CAMK2A is indeed a Ser/Thr kinase as demonstrated by phosphorylation of multiple substrates at Ser/Thr residues. The Ca2+/calmodulin-dependence is captured by other annotations. |
| GO:0005515 protein binding | IPI PMID:17052756 Bcl10 is phosphorylated on Ser138 by Ca2+/calmodulin-depende... | REMOVE | Summary: PMID:17052756 demonstrates CaMKII phosphorylates Bcl10 at Ser138 for NF-kB signaling. While functionally valid, generic protein binding should be avoided. Reason: Generic protein binding annotations should be removed per curation guidelines, even for validated interactions. The functional substrate relationship with Bcl10 is better captured by more specific protein kinase activity terms. Supporting Evidence: PMID:17052756 Bcl10 is phosphorylated on Ser138 by Ca2+/calmodulin-dependent protein kinase II |
| GO:0048167 regulation of synaptic plasticity | IMP file:human/CAMK2A/CAMK2A-deep-research.md | NEW | Summary: CAMK2A is a master regulator of synaptic plasticity, controlling both LTP and LTD, and mediating activity-dependent changes in synaptic strength. Reason: Core biological process for CAMK2A. The kinase integrates calcium signals to regulate various forms of synaptic plasticity including Hebbian LTP/LTD and behavioral timescale synaptic plasticity. Supporting Evidence: file:human/CAMK2A/CAMK2A-deep-research.md CaMKIIΞ± is a master regulator of synaptic plasticity (GO:0048167) β the ability of synapses to strengthen or weaken over time |
| GO:0007611 learning or memory | IMP file:human/CAMK2A/CAMK2A-deep-research.md | NEW | Summary: CAMK2A is directly required for learning and memory formation. Knockout and Thr286 mutant mice show severe learning deficits, and human mutations cause intellectual disability. Reason: Essential biological process annotation. Multiple lines of evidence from mouse models to human genetics demonstrate CAMK2A's critical role in cognitive function and memory formation. Supporting Evidence: file:human/CAMK2A/CAMK2A-deep-research.md Mice lacking CaMKIIΞ± cannot establish normal LTP and exhibit impaired spatial learning, highlighting this gene's role in memory consolidation |
| GO:0014069 postsynaptic density | IBA GO_REF:0000033 | ACCEPT | Summary: CAMK2A is highly enriched at postsynaptic densities where it regulates synaptic plasticity Reason: Postsynaptic density localization is core to CAMK2A's role in synaptic transmission and plasticity |
| GO:0005737 cytoplasm | IBA GO_REF:0000033 | ACCEPT | Summary: CAMK2A is present in the cytoplasm where it can phosphorylate various cytoplasmic substrates Reason: Cytoplasmic localization enables CAMK2A to regulate diverse cellular processes beyond synaptic function |
| GO:0048168 regulation of neuronal synaptic plasticity | IBA GO_REF:0000033 | ACCEPT | Summary: Core biological process for CAMK2A. CaMKIIalpha is a master regulator of synaptic plasticity, essential for LTP induction and memory formation. IBA annotation is well-supported by phylogenetic conservation and extensive experimental evidence from mouse knockout studies [PMID:29100089]. Reason: This is one of the core functions of CAMK2A. The IBA annotation correctly captures the essential role of CaMKII in regulating synaptic plasticity. Multiple lines of evidence from mouse knockouts to human mutations causing intellectual disability confirm this function. Supporting Evidence: file:human/CAMK2A/CAMK2A-deep-research.md CaMKIIalpha is a master regulator of synaptic plasticity (GO:0048167) - the ability of synapses to strengthen or weaken over time |
| GO:1903076 regulation of protein localization to plasma membrane | IBA GO_REF:0000033 | ACCEPT | Summary: CAMK2A regulates the trafficking and membrane insertion of AMPA receptors and other synaptic proteins during LTP. This is a key mechanism for synaptic strengthening [PMID:29100089]. Reason: CaMKII phosphorylates stargazin and other TARPs to promote AMPAR insertion at the synaptic membrane. This regulation of protein localization to plasma membrane is a direct molecular function downstream of kinase activity and essential for LTP expression. Supporting Evidence: file:human/CAMK2A/CAMK2A-deep-research.md CaMKII triggers accumulation of AMPA-type glutamate receptors at the synapse, strengthening synaptic transmission during LTP |
| GO:0043005 neuron projection | IBA GO_REF:0000033 | ACCEPT | Summary: CAMK2A is localized to neuronal projections including dendrites and axons where it regulates synaptic function. Well-supported by proteomics and immunolocalization studies. Reason: Neuron projection localization is core to CAMK2A function. The kinase translocates to dendritic spines upon calcium influx and is enriched in neuronal processes. IBA annotation reflects conserved localization pattern. Supporting Evidence: file:human/CAMK2A/CAMK2A-deep-research.md CaMKIIalpha is predominantly a neuronal protein localized to the cytoplasm and synapses of excitatory neurons |
| GO:0005516 calmodulin binding | IBA GO_REF:0000033 | ACCEPT | Summary: Core molecular function. Ca2+/calmodulin binding to the regulatory segment activates CAMK2A by relieving autoinhibition. Crystal structures have elucidated the binding mechanism [PMID:20668654, PMID:21884935]. Reason: Calmodulin binding is essential for CAMK2A activation. The regulatory segment contains the calmodulin-binding domain (residues 290-300). This is a fundamental aspect of CAMK2A function that defines it as a calcium/calmodulin- dependent kinase. IBA annotation correctly captures this conserved function. Supporting Evidence: PMID:21884935 Calcium/calmodulin (Ca 2+ /CaM) activates CaMKII by displacing an inhibitory segment that blocks the active site of the enzyme |
| GO:0005516 calmodulin binding | IEA GO_REF:0000120 | ACCEPT | Summary: Duplicate annotation of calmodulin binding with IEA evidence. The same function is captured by the IBA annotation above with stronger phylogenetic evidence. Reason: While duplicate, IEA annotations from combined computational methods provide independent support. Calmodulin binding is fundamental to CAMK2A function and having multiple evidence codes is acceptable. |
| GO:0005524 ATP binding | IEA GO_REF:0000120 | ACCEPT | Summary: Core molecular function. ATP binding is required for kinase catalytic activity. The ATP-binding site is located in the N-terminal kinase domain (residues 19-27 and Lys42) as annotated in UniProt. Reason: ATP binding is essential for all protein kinases including CAMK2A. The kinase domain contains a conserved ATP-binding pocket. This is a fundamental molecular function correctly captured by IEA annotation from UniProtKB keywords. |
| GO:0005954 calcium- and calmodulin-dependent protein kinase complex | IEA GO_REF:0000117 | ACCEPT | Summary: Core cellular component. CAMK2A assembles into dodecameric holoenzyme complexes with other CaMKII subunits. The hub domain mediates oligomerization into two stacked hexameric rings [PMID:21884935]. Reason: Complex formation is essential for CAMK2A function. The dodecameric holoenzyme structure enables cooperative activation and inter-subunit autophosphorylation. IEA annotation correctly captures this conserved structural feature. |
| GO:0014069 postsynaptic density | IEA GO_REF:0000044 | ACCEPT | Summary: Core cellular component. CAMK2A is highly enriched at postsynaptic densities where it constitutes a major structural and functional component. CaMKII represents up to 2% of total hippocampal protein. Reason: Postsynaptic density localization is fundamental to CAMK2A function. The kinase translocates to the PSD upon calcium influx and binds to NMDA receptors. This localization is well-documented and essential for synaptic plasticity. IEA from UniProt subcellular location is appropriate. |
| GO:0016301 kinase activity | IEA GO_REF:0000043 | ACCEPT | Summary: Correct but very general. The more specific Ca2+/calmodulin-dependent protein kinase activity (GO:0004683) better captures CAMK2A function. Reason: While overly broad, kinase activity is correct and represents a parent term. The more specific annotations for serine/threonine kinase and calcium/calmodulin-dependent kinase activity are also present. IEA from UniProt keywords is appropriate for general molecular function. |
| GO:0016740 transferase activity | IEA GO_REF:0000043 | ACCEPT | Summary: Very general parent term for kinase activity. Kinases transfer phosphate groups from ATP to substrates. More specific terms are available. Reason: Correct but extremely broad. Transferase activity is the parent class for all kinases. While not informative for CAMK2A specifically, it is not incorrect. IEA from UniProt keywords is acceptable for hierarchical terms. |
| GO:0030425 dendrite | IEA GO_REF:0000044 | ACCEPT | Summary: CAMK2A is abundant in dendrites where it regulates synaptic plasticity. The kinase translocates from dendritic shafts to spines upon activation. Reason: Dendritic localization is well-established for CAMK2A. The kinase is found in dendritic shafts under basal conditions and translocates to dendritic spines upon calcium influx. IEA from UniProt subcellular location is appropriate. |
| GO:0030666 endocytic vesicle membrane | IEA GO_REF:0000117 | KEEP AS NON CORE | Summary: CAMK2A may associate with endocytic vesicles during AMPA receptor trafficking, but this is not a core localization for the kinase. Reason: While CAMK2A may transiently associate with endocytic vesicles during receptor trafficking, the primary localizations are cytoplasm, dendrites, and postsynaptic densities. This annotation represents a peripheral localization rather than core function. |
| GO:0042803 protein homodimerization activity | IEA GO_REF:0000117 | ACCEPT | Summary: CAMK2A forms homodimers as part of the dodecameric holoenzyme assembly. The hub domain mediates homo- and heterooligomerization with other CaMKII subunits [PMID:21884935]. Reason: Homodimerization is essential for CAMK2A holoenzyme assembly. The association domain mediates oligomerization into 12-subunit complexes. While the term could be more specific to the dodecameric complex, homodimerization accurately describes part of the assembly process. |
| GO:0043197 dendritic spine | IEA GO_REF:0000044 | ACCEPT | Summary: Core localization for CAMK2A. The kinase translocates to dendritic spines upon calcium influx through NMDA receptors, where it regulates synaptic plasticity [PMID:28130356]. Reason: Dendritic spine localization is essential for CAMK2A function in synaptic plasticity. The kinase binds to NMDA receptor subunits at spines and phosphorylates synaptic substrates. IEA from UniProt subcellular location is well-supported by experimental evidence. |
| GO:0045202 synapse | IEA GO_REF:0000044 | ACCEPT | Summary: CAMK2A is highly enriched at synapses where it mediates synaptic transmission and plasticity Reason: Synaptic localization is fundamental to CAMK2A's core function in synaptic signaling |
| GO:0046872 metal ion binding | IEA GO_REF:0000043 | ACCEPT | Summary: CAMK2A requires Mg2+ as a cofactor for kinase activity and responds to Ca2+ via calmodulin. Metal ion binding is inherent to kinase function. Reason: Metal ion binding is correct. CAMK2A requires Mg2+ for catalysis (as annotated in UniProt cofactor) and its activity is regulated by Ca2+ through calmodulin. IEA from UniProt keywords is appropriate. |
| GO:0060291 long-term synaptic potentiation | IEA GO_REF:0000117 | ACCEPT | Summary: Core biological process. CAMK2A is absolutely required for LTP induction and maintenance. Knockout mice cannot establish normal LTP. Reason: LTP is a core function of CAMK2A. Extensive evidence from knockout mice and Thr286 mutants demonstrates the kinase is essential for LTP. IEA annotation from ARBA machine learning correctly identifies this well-established function. |
| GO:0106310 protein serine kinase activity | IEA GO_REF:0000116 | ACCEPT | Summary: Correct molecular function. CAMK2A phosphorylates serine residues on substrates including STAT1 Ser727, GluA1 Ser831, and Bcl10 Ser138. Reason: Protein serine kinase activity is well-documented for CAMK2A. The kinase phosphorylates serine residues on multiple substrates. IEA from Rhea mapping correctly captures this catalytic activity based on EC number 2.7.11.17. |
| GO:0005515 protein binding | IPI PMID:33961781 Dual proteome-scale networks reveal cell-specific remodeling... | REMOVE | Summary: High-throughput interactome study. Generic protein binding from proteomics screens lacks functional context for CAMK2A's core synaptic functions. Reason: Per curation guidelines, generic protein binding annotations should be avoided. PMID:33961781 is a large-scale proteomics study that does not provide specific functional insight into CAMK2A's role. More specific molecular function terms are preferred. 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:36931259 A central chaperone-like role for 14-3-3 proteins in human c... | REMOVE | Summary: Study of 14-3-3 protein interactions as chaperones. While 14-3-3 may interact with CAMK2A, generic protein binding is not informative. Reason: Per curation guidelines, generic protein binding should be avoided. While 14-3-3 proteins may interact with phosphorylated CAMK2A, this does not represent a core function. More specific molecular function terms would be needed. Supporting Evidence: PMID:36931259 A central chaperone-like role for 14-3-3 proteins in human cells. |
| GO:0042802 identical protein binding | IPI PMID:20668654 Structure of the CaMKIIdelta/calmodulin complex reveals the ... | ACCEPT | Summary: CAMK2A homodimerizes via the hub domain to form dodecameric holoenzymes. This self-association is essential for cooperative activation and inter-subunit autophosphorylation. Reason: Identical protein binding (homodimerization/oligomerization) is a core property of CAMK2A. The hub domain mediates assembly into 12-subunit holoenzymes. PMID:20668654 provides structural evidence for CaMKII holoenzyme architecture. Supporting Evidence: PMID:20668654 Structure of the CaMKIIdelta/calmodulin complex reveals the molecular mechanism of CaMKII kinase activation. |
| GO:0042802 identical protein binding | IPI PMID:21884935 A mechanism for tunable autoinhibition in the structure of a... | ACCEPT | Summary: Crystal structure of full-length CaMKII holoenzyme showing dodecameric assembly with kinase domains docked against central hub. Reason: PMID:21884935 provides definitive structural evidence for CAMK2A homooligomerization. The crystal structure reveals the dodecameric holoenzyme architecture essential for CaMKII function. Supporting Evidence: PMID:21884935 A mechanism for tunable autoinhibition in the structure of a human Ca2+/calmodulin- dependent kinase II holoenzyme. |
| GO:0004674 protein serine/threonine kinase activity | IDA PMID:40281343 PSAT1 impairs ferroptosis and reduces immunotherapy efficacy... | ACCEPT | Summary: Study showing CAMK2A phosphorylates PSAT1 at Ser337 in response to IFN-gamma, affecting ferroptosis regulation in cancer cells. Reason: Ser/Thr kinase activity is a core molecular function of CAMK2A regardless of cellular context. PMID:40281343 provides direct evidence for kinase activity via phosphorylation of PSAT1. The specific substrate and context (ferroptosis) are peripheral, but the kinase activity is core. Supporting Evidence: PMID:40281343 2025 Apr 25. PSAT1 impairs ferroptosis and reduces immunotherapy efficacy via GPX4 hydroxylation. |
| GO:0071346 cellular response to type II interferon | IDA PMID:40281343 PSAT1 impairs ferroptosis and reduces immunotherapy efficacy... | KEEP AS NON CORE | Summary: CAMK2A is activated by IFN-gamma and phosphorylates PSAT1 to regulate ferroptosis in cancer cells. Non-neuronal immune function. Reason: While CAMK2A does participate in IFN-gamma response, this represents a non-neuronal immune signaling function peripheral to its core synaptic role. The annotation is correct but should be marked as non-core. Supporting Evidence: PMID:40281343 2025 Apr 25. PSAT1 impairs ferroptosis and reduces immunotherapy efficacy via GPX4 hydroxylation. |
| GO:0110076 negative regulation of ferroptosis | IDA PMID:40281343 PSAT1 impairs ferroptosis and reduces immunotherapy efficacy... | KEEP AS NON CORE | Summary: CAMK2A phosphorylates PSAT1 which stabilizes GPX4 to inhibit ferroptosis in cancer cells. Recently described non-neuronal function. Reason: This is a recently identified peripheral function in cancer cells. CAMK2A's role in ferroptosis regulation is context-dependent and not related to its core neuronal functions in synaptic plasticity. Supporting Evidence: PMID:40281343 2025 Apr 25. PSAT1 impairs ferroptosis and reduces immunotherapy efficacy via GPX4 hydroxylation. |
| GO:0060291 long-term synaptic potentiation | TAS PMID:20668654 Structure of the CaMKIIdelta/calmodulin complex reveals the ... | ACCEPT | Summary: Core biological process. The structural study provides context for how CaMKII holoenzyme activation contributes to LTP through regulated autophosphorylation. Reason: LTP is a core function of CAMK2A. TAS annotation based on structural study that discusses CaMKII's role in LTP is appropriate. The holoenzyme structure underlies cooperative activation required for synaptic plasticity. Supporting Evidence: PMID:20668654 Structure of the CaMKIIdelta/calmodulin complex reveals the molecular mechanism of CaMKII kinase activation. |
| GO:0035458 cellular response to interferon-beta | IDA PMID:35568036 A family of conserved bacterial virulence factors dampens in... | KEEP AS NON CORE | Summary: CAMK2A participates in IFN-beta signaling, and bacterial virulence factors that block calcium signaling inhibit this response. Reason: Response to IFN-beta is a peripheral non-neuronal immune function. While the evidence is solid from PMID:35568036, this represents a context-dependent role in immune cells rather than CAMK2A's primary neuronal function. Supporting Evidence: PMID:35568036 2022 May 13. A family of conserved bacterial virulence factors dampens interferon responses by blocking calcium signaling. |
| GO:0046427 positive regulation of receptor signaling pathway via JAK-STAT | IDA PMID:35568036 A family of conserved bacterial virulence factors dampens in... | KEEP AS NON CORE | Summary: CAMK2A positively regulates JAK-STAT signaling in immune response to bacterial infection. Non-neuronal peripheral function. Reason: JAK-STAT pathway regulation is a peripheral immune signaling function. This represents CAMK2A's role in non-neuronal contexts and should be marked as non-core. Supporting Evidence: PMID:35568036 2022 May 13. A family of conserved bacterial virulence factors dampens interferon responses by blocking calcium signaling. |
| GO:0046427 positive regulation of receptor signaling pathway via JAK-STAT | IDA PMID:11972023 Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphoryla... | KEEP AS NON CORE | Summary: CAMK2A phosphorylates STAT1 at Ser727 to enhance transcriptional activity. This is part of cytokine signaling. Reason: STAT1 phosphorylation is a well-documented but peripheral function of CAMK2A in immune/cytokine signaling. This represents a non-neuronal role distinct from core synaptic plasticity function. Supporting Evidence: PMID:11972023 Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphorylation in response to IFN-gamma. |
| GO:0051346 negative regulation of hydrolase activity | ISS GO_REF:0000024 | UNDECIDED | Summary: ISS annotation inferred from mouse/rat data. The specific hydrolase target is unclear. This is a very general term. Reason: Unable to verify specific hydrolase target without access to the underlying mouse/rat literature. The annotation is too general to evaluate properly. ISS evidence from rodent data may be valid but requires review. |
| GO:2000124 regulation of endocannabinoid signaling pathway | ISS GO_REF:0000024 | KEEP AS NON CORE | Summary: ISS annotation from mouse/rat. CaMKII can regulate endocannabinoid synthesis or signaling in synaptic contexts. Reason: Endocannabinoid signaling regulation is a peripheral neuromodulatory function. While related to synaptic function, this is not a core activity of CAMK2A but rather a context-dependent regulatory role. |
| GO:0005954 calcium- and calmodulin-dependent protein kinase complex | IDA PMID:20668654 Structure of the CaMKIIdelta/calmodulin complex reveals the ... | ACCEPT | Summary: CAMK2A assembles into dodecameric holoenzyme complexes that enable cooperative regulation Reason: Complex formation is essential for CAMK2A's cooperative activation and regulation mechanisms Supporting Evidence: PMID:20668654 Structure of the CaMKIIdelta/calmodulin complex reveals the molecular mechanism of CaMKII kinase activation. |
| GO:0005954 calcium- and calmodulin-dependent protein kinase complex | IDA PMID:28130356 A Novel Human CAMK2A Mutation Disrupts Dendritic Morphology ... | ACCEPT | Summary: Direct assay evidence for CaMKII complex formation in dendritic spines. Core structural component of the holoenzyme. Reason: CaMKII complex formation is a fundamental property of CAMK2A. PMID:28130356 provides direct experimental evidence supporting this core localization to the holoenzyme complex. Supporting Evidence: PMID:28130356 Epub 2017 Jan 27. A Novel Human CAMK2A Mutation Disrupts Dendritic Morphology and Synaptic Transmission, and Causes ASD-Related Behaviors. |
| GO:0043197 dendritic spine | IDA PMID:28130356 A Novel Human CAMK2A Mutation Disrupts Dendritic Morphology ... | ACCEPT | Summary: CAMK2A localizes to dendritic spines where it regulates spine development and plasticity Reason: Dendritic spine localization is essential for CAMK2A's role in structural synaptic plasticity Supporting Evidence: PMID:28130356 Epub 2017 Jan 27. A Novel Human CAMK2A Mutation Disrupts Dendritic Morphology and Synaptic Transmission, and Causes ASD-Related Behaviors. |
| GO:0060996 dendritic spine development | IMP PMID:28130356 A Novel Human CAMK2A Mutation Disrupts Dendritic Morphology ... | ACCEPT | Summary: CAMK2A regulates dendritic spine morphogenesis and maturation. Mutant phenotype evidence for role in spine development. Reason: Dendritic spine development is closely linked to CAMK2A's core synaptic function. The kinase regulates spine size and morphology, which underlies structural synaptic plasticity. IMP evidence is appropriate. Supporting Evidence: PMID:28130356 Epub 2017 Jan 27. A Novel Human CAMK2A Mutation Disrupts Dendritic Morphology and Synaptic Transmission, and Causes ASD-Related Behaviors. |
| GO:1990443 peptidyl-threonine autophosphorylation | IMP PMID:28130356 A Novel Human CAMK2A Mutation Disrupts Dendritic Morphology ... | ACCEPT | Summary: Core molecular process. CAMK2A autophosphorylates at Thr286 to achieve calcium-independent autonomous activity. Essential for LTP. Reason: Thr286 autophosphorylation is a hallmark feature of CaMKII biology. This enables the kinase to remain active after calcium signals subside, providing molecular memory. IMP evidence from mutant phenotypes is solid. Supporting Evidence: PMID:28130356 Epub 2017 Jan 27. A Novel Human CAMK2A Mutation Disrupts Dendritic Morphology and Synaptic Transmission, and Causes ASD-Related Behaviors. |
| GO:2001222 regulation of neuron migration | IMP PMID:29100089 De Novo Mutations in Protein Kinase Genes CAMK2A and CAMK2B ... | KEEP AS NON CORE | Summary: Disease-associated CAMK2A mutations affect neuronal migration during development, as shown by in utero electroporation in mouse. Reason: Neuron migration regulation is a developmental function distinct from CAMK2A's core role in synaptic plasticity. PMID:29100089 shows mutations affecting autophosphorylation also impair migration, but this is a developmental context rather than mature neuron function. Supporting Evidence: PMID:29100089 We further found that all mutations affecting auto-phosphorylation also affected neuronal migration, highlighting the importance of tightly regulated CAMK2 auto-phosphorylation in neuronal function and neurodevelopment |
| GO:0005739 mitochondrion | ISS GO_REF:0000024 | KEEP AS NON CORE | Summary: ISS annotation for mitochondrial localization inferred from mouse/rat. CAMK2A may associate with mitochondria in certain contexts. Reason: Mitochondrial localization is peripheral to CAMK2A's primary synaptic functions. While the kinase may interact with mitochondria in cardiac or other contexts, this is not a core localization for the alpha isoform predominantly expressed in neurons. |
| GO:0005516 calmodulin binding | IPI PMID:20668654 Structure of the CaMKIIdelta/calmodulin complex reveals the ... | ACCEPT | Summary: Structural study of CaMKII/calmodulin complex reveals molecular mechanism of kinase activation. Core molecular function. Reason: Calmodulin binding is essential for CAMK2A activation. PMID:20668654 provides detailed structural evidence for the CaMKII-calmodulin interaction. This is a fundamental molecular function with strong IPI evidence. Supporting Evidence: PMID:20668654 Structure of the CaMKIIdelta/calmodulin complex reveals the molecular mechanism of CaMKII kinase activation. |
| GO:0038166 angiotensin-activated signaling pathway | IDA PMID:20584908 Activation of Na+/H+ exchanger NHE3 by angiotensin II is med... | KEEP AS NON CORE | Summary: CaMKII mediates angiotensin II activation of NHE3 in kidney proximal tubule cells via IRBIT phosphorylation. Non-neuronal function. Reason: Angiotensin signaling is a peripheral renal function. While the evidence from PMID:20584908 is solid, this represents CAMK2A function in non-neuronal kidney cells, distinct from its core synaptic role. Supporting Evidence: PMID:20584908 2010 Jun 28. Activation of Na+/H+ exchanger NHE3 by angiotensin II is mediated by inositol 1,4,5-triphosphate (IP3) receptor-binding protein released with IP3 (IRBIT) and Ca2+/calmodulin-dependent protein kinase II. |
| GO:0000082 G1/S transition of mitotic cell cycle | ISS GO_REF:0000024 | MARK AS OVER ANNOTATED | Summary: ISS annotation from mouse/rat suggesting role in cell cycle. CAMK2A is predominantly expressed in post-mitotic neurons. Reason: Cell cycle regulation is likely an over-annotation for CAMK2A which is predominantly expressed in post-mitotic neurons. While CaMKII may have cell cycle roles in dividing cells, this is not relevant to the neuronal function of CAMK2A alpha isoform. |
| GO:0002931 response to ischemia | ISS GO_REF:0000024 | KEEP AS NON CORE | Summary: ISS annotation from mouse/rat. CaMKII activation occurs during ischemia with pathological consequences including excitotoxicity. Reason: Response to ischemia is a pathological context rather than normal physiological function. While CaMKII is activated during ischemic conditions, this represents a disease-related response rather than core function. |
| GO:0006816 calcium ion transport | ISS GO_REF:0000024 | MARK AS OVER ANNOTATED | Summary: ISS annotation suggesting CAMK2A involvement in calcium transport. CAMK2A responds to calcium but does not directly transport it. Reason: CAMK2A is a calcium-sensing kinase but does not directly transport calcium ions. The kinase phosphorylates calcium channels and pumps to regulate their activity, but the term calcium ion transport implies direct involvement in transport which is misleading. |
| GO:0010666 positive regulation of cardiac muscle cell apoptotic process | ISS GO_REF:0000024 | MARK AS OVER ANNOTATED | Summary: ISS annotation from mouse/rat. CaMKII can promote cardiac myocyte apoptosis in pathological conditions, but this is for delta isoform. Reason: Cardiac apoptosis regulation is primarily associated with CaMKII delta (CAMK2D), not the alpha isoform which is predominantly neuronal. This annotation likely represents isoform confusion and is not relevant to CAMK2A core function. |
| GO:0035254 glutamate receptor binding | ISS GO_REF:0000024 | ACCEPT | Summary: Core molecular function. CAMK2A binds directly to NMDA receptor subunits GluN2B at the postsynaptic density. Essential for synaptic plasticity. Reason: Glutamate receptor binding is a core function of CAMK2A. The kinase translocates to the PSD and binds to NMDA receptor subunits, particularly GluN2B. This interaction is critical for LTP induction and maintenance. |
| GO:0048168 regulation of neuronal synaptic plasticity | ISS GO_REF:0000024 | ACCEPT | Summary: Core biological process. This ISS annotation duplicates the IBA annotation for the same term with similar evidence support. Reason: Regulation of neuronal synaptic plasticity is a core function of CAMK2A. The ISS annotation from mouse/rat ortholog studies supports the IBA annotation and is well-established in the literature. |
| GO:0051928 positive regulation of calcium ion transport | ISS GO_REF:0000024 | KEEP AS NON CORE | Summary: ISS annotation suggesting CAMK2A positively regulates calcium transport. CaMKII phosphorylates calcium channels to modulate activity. Reason: While CAMK2A can phosphorylate calcium channels like L-type VGCCs, the primary function is calcium sensing rather than regulating calcium transport. This is a downstream effect of kinase activity rather than core function. |
| GO:1902108 regulation of mitochondrial membrane permeability involved in apoptotic process | ISS GO_REF:0000024 | MARK AS OVER ANNOTATED | Summary: ISS annotation suggesting role in mitochondrial apoptotic pathway. More relevant to cardiac delta isoform than neuronal alpha. Reason: Mitochondrial apoptosis regulation is primarily associated with CaMKII delta in cardiac cells, not the alpha isoform. This annotation likely reflects isoform confusion and is not relevant to CAMK2A's core neuronal function. |
| GO:0046928 regulation of neurotransmitter secretion | ISS GO_REF:0000024 | KEEP AS NON CORE | Summary: ISS annotation from mouse/rat. CaMKII can regulate presynaptic neurotransmitter release through phosphorylation of synapsin. Reason: While CaMKII can regulate neurotransmitter secretion presynaptically, CAMK2A's primary role is in postsynaptic regulation of AMPA receptors and LTP. Presynaptic functions are more associated with CAMK2B. Keep as non-core. |
| GO:0042803 protein homodimerization activity | IPI PMID:20668654 Structure of the CaMKIIdelta/calmodulin complex reveals the ... | ACCEPT | Summary: Structural study confirming CaMKII homodimerization/oligomerization. Core molecular function for holoenzyme assembly. Reason: Homodimerization activity is essential for CAMK2A holoenzyme formation. PMID:20668654 provides structural evidence for CaMKII oligomerization via the hub domain. Supporting Evidence: PMID:20668654 Structure of the CaMKIIdelta/calmodulin complex reveals the molecular mechanism of CaMKII kinase activation. |
| GO:0005634 nucleus | HDA PMID:21630459 Proteomic characterization of the human sperm nucleus. | ACCEPT | Summary: CAMK2A nuclear localization enables regulation of transcriptional responses Reason: Nuclear localization allows CAMK2A to phosphorylate transcriptional regulators like STAT1 Supporting Evidence: PMID:21630459 Jun 1. Proteomic characterization of the human sperm nucleus. |
| GO:0005829 cytosol | TAS Reactome:R-HSA-432164 | ACCEPT | Summary: Reactome pathway annotation for cytosolic localization. CAMK2A is found in the cytosol under basal conditions. Reason: Cytosolic localization is well-established for CAMK2A. The kinase resides in the cytosol and translocates to synaptic sites upon activation. Multiple Reactome pathway references support this basic localization. |
| GO:0005829 cytosol | TAS Reactome:R-HSA-4332356 | ACCEPT | Summary: Duplicate Reactome annotation for cytosol localization from CaMKII pathway. Reason: Cytosolic localization is correct. Duplicate Reactome entries reflect different pathway contexts but the localization is valid. |
| GO:0005829 cytosol | TAS Reactome:R-HSA-4332358 | ACCEPT | Summary: Duplicate Reactome annotation for cytosol localization from CaMKII pathway. Reason: Cytosolic localization is correct. Duplicate annotation from Reactome CaMKII signaling pathway. |
| GO:0005829 cytosol | TAS Reactome:R-HSA-4332359 | ACCEPT | Summary: Duplicate Reactome annotation for cytosol localization from CaMKII pathway. Reason: Cytosolic localization is correct. Duplicate annotation from Reactome CaMKII signaling pathway. |
| GO:0005829 cytosol | TAS Reactome:R-HSA-4332363 | ACCEPT | Summary: Duplicate Reactome annotation for cytosol localization from CaMKII pathway. Reason: Cytosolic localization is correct. Duplicate annotation from Reactome CaMKII signaling pathway. |
| GO:0005829 cytosol | TAS Reactome:R-HSA-4332388 | ACCEPT | Summary: Duplicate Reactome annotation for cytosol localization from CaMKII pathway. Reason: Cytosolic localization is correct. Duplicate annotation from Reactome CaMKII signaling pathway. |
| GO:0005829 cytosol | TAS Reactome:R-HSA-5672965 | ACCEPT | Summary: Duplicate Reactome annotation for cytosol localization. Reason: Cytosolic localization is correct. Duplicate annotation from Reactome signaling pathway. |
| GO:0005654 nucleoplasm | TAS Reactome:R-HSA-5082387 | ACCEPT | Summary: Reactome annotation for nucleoplasm localization. CAMK2A can translocate to nucleus to phosphorylate transcription factors. Reason: Nucleoplasmic localization is supported by evidence that CAMK2A phosphorylates transcription factors like STAT1 in the nucleus. TAS from Reactome is appropriate. |
| GO:0005829 cytosol | TAS Reactome:R-HSA-909552 | ACCEPT | Summary: Duplicate Reactome annotation for cytosol localization. Reason: Cytosolic localization is correct. Duplicate annotation from Reactome signaling pathway. |
| GO:0030666 endocytic vesicle membrane | TAS Reactome:R-HSA-416320 | KEEP AS NON CORE | Summary: Reactome annotation for endocytic vesicle membrane localization. Related to receptor internalization pathways. Reason: Endocytic vesicle membrane localization is peripheral to CAMK2A's primary function. While the kinase may associate with endocytic machinery during receptor trafficking, this is not a core localization. |
| GO:0006468 protein phosphorylation | IDA PMID:17052756 Bcl10 is phosphorylated on Ser138 by Ca2+/calmodulin-depende... | ACCEPT | Summary: CaMKII phosphorylates Bcl10 at Ser138 as demonstrated in this study. Core molecular function as a protein kinase. Reason: Protein phosphorylation is the core enzymatic activity of CAMK2A. PMID:17052756 demonstrates phosphorylation of Bcl10 as a CaMKII substrate, providing direct IDA evidence for kinase activity. Supporting Evidence: PMID:17052756 Here we show that CaMKII phosphorylates Bcl10 on Ser138 |
| GO:0016301 kinase activity | IDA PMID:17052756 Bcl10 is phosphorylated on Ser138 by Ca2+/calmodulin-depende... | ACCEPT | Summary: Core molecular function demonstrated by Bcl10 phosphorylation. General kinase activity term supported by IDA evidence. Reason: Kinase activity is a core molecular function of CAMK2A. While this is a general term, IDA evidence from direct phosphorylation assays in PMID:17052756 is appropriate. Supporting Evidence: PMID:17052756 2006 Oct 18. Bcl10 is phosphorylated on Ser138 by Ca2+/calmodulin-dependent protein kinase II. |
| GO:0051092 obsolete positive regulation of NF-kappaB transcription factor activity | IMP PMID:17052756 Bcl10 is phosphorylated on Ser138 by Ca2+/calmodulin-depende... | MODIFY | Summary: CaMKII phosphorylates Bcl10 to regulate NF-kappaB activation in T cells. Non-neuronal immune signaling function. Term GO:0051092 is now obsolete; replaced by GO:0043123. Reason: NF-kappaB regulation via Bcl10 phosphorylation is a peripheral immune signaling function. PMID:17052756 shows this in T cell receptor signaling, which is distinct from CAMK2A's core neuronal functions. Original term obsoleted. Proposed replacements: positive regulation of canonical NF-kappaB signal transduction Supporting Evidence: PMID:17052756 2006 Oct 18. Bcl10 is phosphorylated on Ser138 by Ca2+/calmodulin-dependent protein kinase II. |
| GO:0097106 postsynaptic density organization | IEA | NEW | Summary: Essential structural component and organizer of the postsynaptic density through its dodecameric holoenzyme structure Reason: CAMK2A is a major structural component of the postsynaptic density (PSD), comprising up to 2% of total protein in some synapses. The protein forms large dodecameric holoenzymes that serve as scaffolds for organizing other synaptic proteins within the PSD. Beyond its kinase activity, CAMK2A's structural role in PSD organization is essential for proper synaptic function, receptor clustering, and synaptic transmission. This represents a core function distinct from its enzymatic activity. Supporting Evidence: file:human/CAMK2A/CAMK2A-deep-research.md CaMKII is an abundant multifunctional serine/threonine kinase...necessary for assembly of 12-subunit holoenzymes |
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Download this section (compressed HTML)Q: How does autophosphorylation of CAMK2A create molecular memory and contribute to synaptic plasticity and learning?
Q: What determines the subcellular localization of CAMK2A and how does this regulate its access to different substrates?
Q: How do different splice variants of CAMK2A contribute to brain region-specific functions and neuronal plasticity?
Q: What are the mechanisms by which CAMK2A integrates calcium signals with other signaling pathways during synaptic transmission?
Experiment: Two-photon calcium imaging combined with optogenetics to study CAMK2A activation dynamics in dendritic spines during synaptic plasticity
Experiment: Cryo-EM structural analysis of CAMK2A holoenzymes in different activation states to understand autophosphorylation mechanisms
Experiment: Single-molecule tracking of CAMK2A in live neurons to characterize its mobility and clustering at synaptic sites
Experiment: Proteomics identification of context-specific CAMK2A substrates using chemical crosslinking and mass spectrometry
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Download this section (compressed HTML)π View Pathway Visualization Interactive pathway diagram with detailed annotations