CALM1

UniProt ID: P0DP23
Organism: Homo sapiens
Review Status: COMPLETE
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Gene Description

Calmodulin-1 is a ubiquitous calcium-binding messenger protein that serves as the primary intracellular calcium sensor in eukaryotic cells. Through its four EF-hand domains, CALM1 binds calcium ions and undergoes conformational changes that enable it to interact with and regulate over 100 different target proteins including kinases, phosphatases, ion channels, and cytoskeletal proteins. It plays essential roles in muscle contraction, neurotransmitter release, cell cycle progression, and calcium homeostasis. Mutations in CALM1 cause severe cardiac arrhythmias including catecholaminergic polymorphic ventricular tachycardia (CPVT) and long QT syndrome (LQTS), which can lead to sudden cardiac death. The protein is also exploited by bacterial pathogens such as Shigella flexneri whose effector proteins bind the apo form of calmodulin to disrupt calcium signaling during infection.

Existing Annotations Review

GO Term Evidence Action Reason
GO:0005509 calcium ion binding
IBA
GO_REF:0000033
ACCEPT
Summary: Core calcium-binding function of calmodulin with 4 EF-hand domains. Well-supported by multiple experimental studies and essential for all downstream calcium-mediated functions.
Reason: This is the fundamental molecular function of calmodulin. Multiple experimental studies confirm calcium binding through 4 EF-hand domains (PMID:23040497, PMID:31454269, PMID:26164367, PMID:26969752, PMID:27516456). IBA annotation is well-founded based on phylogenetic conservation.
Supporting Evidence:
PMID:23040497
Both CALM1 substitutions demonstrated compromised calcium binding
file:human/CALM1/CALM1-deep-research-falcon.md
See deep research file for comprehensive analysis
file:human/CALM1/CALM1-falcon-research.md
See deep research file for comprehensive analysis
GO:0005634 nucleus
IBA
GO_REF:0000033
KEEP AS NON CORE
Summary: Nuclear localization supported by high-throughput proteomic study but not core function.
Reason: While HDA evidence (PMID:21630459) confirms nuclear presence in sperm, and Reactome annotations indicate nuclear processes, this is not a core localization for CALM1 function. Primary functions occur in cytoplasm, centrosome, and membrane-associated complexes.
Supporting Evidence:
PMID:21630459
Proteomic characterization of the human sperm nucleus
GO:0010880 regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum
IBA
GO_REF:0000033
ACCEPT
Summary: Core cardiac function regulating calcium release from sarcoplasmic reticulum via RyR2 interaction.
Reason: Essential cardiac function confirmed by multiple studies showing CALM1 regulates RyR2-mediated calcium release. Mutations cause CPVT through defective RyR2 regulation. IDA evidence (PMID:20226167) directly supports this function.
Supporting Evidence:
PMID:20226167
cAMP caused a significant decrease of the CaM-binding affinity in KI hearts...the addition of a high concentration of CaM attenuated the aberrant increase of Ca(2+) sparks
GO:0005513 detection of calcium ion
IBA
GO_REF:0000033
ACCEPT
Summary: Core calcium sensing function - undergoes conformational change upon calcium binding to activate downstream targets.
Reason: This is the essential calcium sensor function of calmodulin. Upon binding calcium, CALM1 undergoes conformational changes that enable interaction with and activation of numerous targets. Well-supported by structural and functional studies (PMID:23040497).
Supporting Evidence:
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and sudden cardiac death...Both CALM1 substitutions demonstrated compromised calcium binding
GO:0097720 calcineurin-mediated signaling
IBA
GO_REF:0000033
ACCEPT
Summary: Core signaling function - CALM1 binds and activates calcineurin phosphatase in calcium-dependent manner.
Reason: Essential calcium-dependent signaling pathway. CALM1 binds calcineurin and is required for its phosphatase activity. IDA evidence (PMID:8631777) directly demonstrates this interaction. Critical for NFAT signaling and immune responses.
Supporting Evidence:
PMID:8631777
Blocking the Ca2+-induced conformational transitions in calmodulin with disulfide bonds
GO:0005737 cytoplasm
IBA
GO_REF:0000033
ACCEPT
Summary: Core cytoplasmic localization where CALM1 performs most calcium-sensing and signaling functions.
Reason: Primary cellular compartment for CALM1 function. TAS evidence (PMID:10899953) and IDA evidence (PMID:27165696) confirm cytoplasmic localization. Essential for interaction with cytoplasmic targets.
Supporting Evidence:
PMID:27165696
Arrhythmogenic calmodulin mutations impede activation of small-conductance calcium-activated potassium current
PMID:10899953
Calmodulin regulation of basal and agonist-stimulated G protein coupling
GO:0005813 centrosome
IBA
GO_REF:0000033
ACCEPT
Summary: Important centrosomal localization for cell division regulation through interaction with CP110.
Reason: Well-documented centrosomal localization with functional significance. IDA evidence (PMID:16760425) shows CALM1 at centrosomes interacting with CP110 to regulate cytokinesis. Essential for proper cell division.
Supporting Evidence:
PMID:16760425
CP110 interacts with two different Ca2+-binding proteins, calmodulin (CaM) and centrin, in vivo
GO:0043209 myelin sheath
IBA
GO_REF:0000033
KEEP AS NON CORE
Summary: Myelin sheath localization likely related to interaction with myelin basic protein.
Reason: While CALM1 interacts with myelin basic protein (PMID:19855925) and may have roles in myelin, this is not a core function. The IEA annotation (GO_REF:0000120) also supports this but represents a specialized, tissue-specific role.
Supporting Evidence:
PMID:19855925
Structural analysis of the complex between calmodulin and full-length myelin basic protein, an intrinsically disordered molecule
GO:0000922 spindle pole
IEA
GO_REF:0000120
ACCEPT
Summary: Spindle pole localization supported by experimental evidence for cell division regulation.
Reason: IDA evidence (PMID:16760425) directly demonstrates CALM1 localization at spindle poles during mitosis, where it regulates cytokinesis through CP110 interaction. Important for proper cell division.
Supporting Evidence:
PMID:16760425
CP110 cooperates with two calcium-binding proteins to regulate cytokinesis and genome stability
GO:0002027 regulation of heart rate
IEA
GO_REF:0000117
ACCEPT
Summary: Core cardiac function - CALM1 mutations cause arrhythmias demonstrating essential role in heart rate regulation.
Reason: Critical cardiac function directly demonstrated by human genetics. IMP evidence (PMID:23040497) shows CALM1 mutations cause ventricular tachycardia and sudden cardiac death through disrupted heart rate regulation.
Supporting Evidence:
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and sudden cardiac death
GO:0005246 calcium channel regulator activity
IEA
GO_REF:0000117
ACCEPT
Summary: Core function - CALM1 regulates multiple calcium channels including L-type and ryanodine receptors.
Reason: Essential molecular function supported by extensive evidence. IDA evidence (PMID:20226167) shows RyR2 regulation. CALM1 mutations disrupt calcium channel regulation causing cardiac arrhythmias (PMID:31454269, PMID:26969752).
Supporting Evidence:
PMID:20226167
Defective calmodulin binding to the cardiac ryanodine receptor plays a key role in CPVT-associated channel dysfunction
PMID:26969752
alter the properties of the cardiac L-type calcium channel
GO:0005509 calcium ion binding
IEA
GO_REF:0000120
ACCEPT
Summary: Duplicate annotation with different evidence code - core function.
Reason: Same core calcium binding function as IBA annotation but from combined automated methods. Redundant but correct.
Supporting Evidence:
GO_REF:0000120
Combined Automated Annotation using Multiple IEA Methods
GO:0005513 detection of calcium ion
IEA
GO_REF:0000117
ACCEPT
Summary: Duplicate of IBA annotation - core calcium sensing function.
Reason: Same essential calcium sensing function as IBA annotation but from ARBA machine learning. Redundant but correct.
Supporting Evidence:
GO_REF:0000117
Electronic Gene Ontology annotations created by ARBA machine learning models
GO:0005813 centrosome
IEA
GO_REF:0000120
ACCEPT
Summary: Duplicate centrosome annotation - already covered by IBA.
Reason: Same centrosomal localization as IBA annotation. Supported by IDA evidence (PMID:16760425).
Supporting Evidence:
PMID:16760425
CP110 cooperates with two calcium-binding proteins to regulate cytokinesis and genome stability
GO:0005819 spindle
IEA
GO_REF:0000044
ACCEPT
Summary: Spindle localization for cell division regulation.
Reason: Consistent with spindle pole and spindle microtubule localizations. CALM1 regulates mitotic progression and cytokinesis at spindle.
Supporting Evidence:
GO_REF:0000044
Gene Ontology annotation based on UniProtKB/Swiss-Prot Subcellular Location vocabulary mapping
GO:0005876 spindle microtubule
IEA
GO_REF:0000117
ACCEPT
Summary: Spindle microtubule localization for mitosis regulation.
Reason: IDA evidence (PMID:16760425) confirms spindle microtubule localization. CALM1 with CP110 regulates spindle function and cytokinesis.
Supporting Evidence:
PMID:16760425
CP110 cooperates with two calcium-binding proteins to regulate cytokinesis and genome stability
GO:0010856 adenylate cyclase activator activity
IEA
GO_REF:0000117
ACCEPT
Summary: CALM1 activates adenylate cyclase, particularly bacterial adenylyl cyclase exotoxin.
Reason: IDA evidence (PMID:11807546) demonstrates direct activation of adenylyl cyclase by calmodulin. Important for cAMP signaling and exploited by bacterial pathogens like anthrax.
Supporting Evidence:
PMID:11807546
Structural basis for the activation of anthrax adenylyl cyclase exotoxin by calmodulin
GO:0010881 regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion
IEA
GO_REF:0000117
ACCEPT
Summary: Core cardiac function regulating calcium-induced calcium release in cardiac muscle.
Reason: Essential cardiac function with strong experimental support. IDA evidence (PMID:23040497, PMID:20226167) demonstrates CALM1 regulation of RyR2-mediated calcium release critical for cardiac contraction. Mutations cause CPVT.
Supporting Evidence:
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and sudden cardiac death
PMID:20226167
Defective calmodulin binding to the cardiac ryanodine receptor plays a key role in CPVT-associated channel dysfunction
GO:0019901 protein kinase binding
IEA
GO_REF:0000117
ACCEPT
Summary: Core function - CALM1 binds and regulates multiple protein kinases including CaMKII.
Reason: Essential function of calmodulin to bind and regulate calcium-dependent protein kinases. IPI evidence (PMID:20668654) demonstrates direct CaMKII binding. Critical for calcium signal transduction.
Supporting Evidence:
PMID:20668654
Structure of the CaMKIIdelta/calmodulin complex reveals the molecular mechanism of CaMKII kinase activation
GO:0030017 sarcomere
IEA
GO_REF:0000117
ACCEPT
Summary: Sarcomere localization for muscle contraction regulation.
Reason: IDA evidence (PMID:20226167) demonstrates sarcomeric localization. CALM1 regulates muscle contraction through RyR2 and titin interactions at sarcomere.
Supporting Evidence:
PMID:20226167
Defective calmodulin binding to the cardiac ryanodine receptor plays a key role in CPVT-associated channel dysfunction
GO:0031432 titin binding
IEA
GO_REF:0000117
ACCEPT
Summary: CALM1 binds titin kinase domain in cardiac muscle for mechanosensing.
Reason: IPI evidence (PMID:7607248) demonstrates direct calmodulin binding to cardiac titin kinase C-terminus. Important for cardiac mechanosensing and muscle regulation.
Supporting Evidence:
PMID:7607248
A calmodulin-binding sequence in the C-terminus of human cardiac titin kinase
GO:0031514 motile cilium
IEA
GO_REF:0000044
KEEP AS NON CORE
Summary: Ciliary localization based on subcellular location mapping.
Reason: Based on UniProt subcellular location vocabulary mapping. CALM1 may regulate ciliary beating through calcium signaling but this is specialized, not core function.
Supporting Evidence:
GO_REF:0000044
Gene Ontology annotation based on UniProtKB/Swiss-Prot Subcellular Location vocabulary mapping
GO:0032465 regulation of cytokinesis
IEA
GO_REF:0000117
ACCEPT
Summary: Important cell division function through CP110 interaction at centrosomes.
Reason: IMP evidence (PMID:16760425) demonstrates CALM1 depletion causes cytokinesis failure and binucleate cells. Works with CP110 and centrin at spindle poles to regulate cell division completion.
Supporting Evidence:
PMID:16760425
CP110 cooperates with two calcium-binding proteins to regulate cytokinesis and genome stability...depletion leads to a failure at a late stage of cytokinesis and the formation of binucleate cells
GO:0034704 calcium channel complex
IEA
GO_REF:0000117
ACCEPT
Summary: CALM1 associates with calcium channel complexes for regulation.
Reason: IDA evidence (PMID:23040497) confirms localization to calcium channel complexes. CALM1 directly regulates L-type and ryanodine receptor calcium channels as part of channel complexes.
Supporting Evidence:
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and sudden cardiac death
GO:0043539 protein serine/threonine kinase activator activity
IEA
GO_REF:0000117
ACCEPT
Summary: Core function - CALM1 activates multiple serine/threonine kinases including CaMKII in calcium-dependent manner.
Reason: Essential molecular function with extensive experimental support. IDA evidence from multiple studies (PMID:35568036, PMID:14722083) demonstrates direct kinase activation. TAS evidence (PMID:20668654) confirms CaMKII activation mechanism.
Supporting Evidence:
PMID:35568036
A family of conserved bacterial virulence factors dampens interferon responses by blocking calcium signaling
PMID:14722083
Comparative analyses of the three-dimensional structures and enzymatic properties of alpha, beta, gamma and delta isoforms of Ca2+-calmodulin-dependent protein kinase II
GO:0046872 metal ion binding
IEA
GO_REF:0000043
MODIFY
Summary: Too general - calcium ion binding is the specific function.
Reason: While technically correct (calcium is a metal ion), this term is too general. GO:0005509 (calcium ion binding) is the appropriate specific term that captures the actual function.
Proposed replacements: calcium ion binding
Supporting Evidence:
GO_REF:0000043
Gene Ontology annotation based on UniProtKB/Swiss-Prot keyword mapping
GO:0060291 long-term synaptic potentiation
IEA
GO_REF:0000117
KEEP AS NON CORE
Summary: Important neuronal function through CaMKII activation in synaptic plasticity.
Reason: Valid neuronal function supported by TAS evidence (PMID:20668654) showing CaMKII-calmodulin complex role in LTP. However, this is tissue-specific (brain) rather than core ubiquitous function.
Supporting Evidence:
PMID:20668654
Structure of the CaMKIIdelta/calmodulin complex reveals the molecular mechanism of CaMKII kinase activation
GO:0072542 protein phosphatase activator activity
IEA
GO_REF:0000117
ACCEPT
Summary: Core function - CALM1 activates calcineurin phosphatase in calcium-dependent manner.
Reason: Essential molecular function for phosphatase regulation. IDA evidence (PMID:8631777) demonstrates direct calcineurin activation by calmodulin. Critical for NFAT signaling and numerous cellular processes.
Supporting Evidence:
PMID:8631777
Blocking the Ca2+-induced conformational transitions in calmodulin with disulfide bonds
GO:0097720 calcineurin-mediated signaling
IEA
GO_REF:0000117
ACCEPT
Summary: Duplicate of IBA annotation - core signaling function.
Reason: Same calcineurin signaling function as IBA annotation. IDA evidence (PMID:8631777) supports this.
Supporting Evidence:
PMID:8631777
Blocking the Ca2+-induced conformational transitions in calmodulin with disulfide bonds
GO:1901844 regulation of cell communication by electrical coupling involved in cardiac conduction
IEA
GO_REF:0000117
ACCEPT
Summary: Core cardiac conduction function - CALM1 mutations disrupt electrical coupling causing arrhythmias.
Reason: Essential cardiac function with strong experimental support. IDA evidence (PMID:23040497) shows CALM1 mutations cause defective cardiac conduction. Critical for maintaining proper heart rhythm through ion channel regulation.
Supporting Evidence:
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and sudden cardiac death...characterized by episodic syncope and/or sudden cardiac arrest during exercise or acute emotion
GO:0005515 protein binding
IPI
PMID:30842726
An IQSEC2 Mutation Associated With Intellectual Disability a...
MODIFY
Summary: Generic protein binding annotation for IQSEC2 interaction, lacks specificity.
Reason: While the interaction with IQSEC2 is valid (PMID:30842726), the generic "protein binding" term provides no functional information. Should use more specific terms related to the actual function.
Supporting Evidence:
PMID:30842726
An IQSEC2 Mutation Associated With Intellectual Disability and Autism Results in Decreased Surface AMPA Receptors
GO:0005515 protein binding
IPI
PMID:31983428
Interaction between IDH1 WT and calmodulin and its implicati...
MODIFY
Summary: Generic protein binding for IDH1 interaction, lacks functional specificity.
Reason: Interaction with IDH1 is documented (PMID:31983428) but generic protein binding term uninformative. Need more specific functional annotation.
Proposed replacements: enzyme activator activity
Supporting Evidence:
PMID:31983428
Interaction between IDH1 WT and calmodulin and its implications for glioblastoma cell growth and migration
GO:0005515 protein binding
IPI
PMID:35271311
OpenCell: Endogenous tagging for the cartography of human ce...
REMOVE
Summary: Generic protein binding from OpenCell proteomics study.
Reason: This is from a large-scale proteomics study (PMID:35271311 - OpenCell) and the generic protein binding term adds no functional information beyond what is already captured by more specific binding annotations.
Supporting Evidence:
PMID:35271311
OpenCell: Endogenous tagging for the cartography of human cellular organization
GO:0000086 G2/M transition of mitotic cell cycle
IEA
GO_REF:0000120
ACCEPT
Summary: CALM1 regulates G2/M transition through centrosome/spindle functions.
Reason: Consistent with demonstrated role in cytokinesis and spindle regulation through CP110 interaction (PMID:16760425). CALM1 required for proper mitotic progression.
Supporting Evidence:
PMID:16760425
CP110 cooperates with two calcium-binding proteins to regulate cytokinesis and genome stability
GO:0008076 voltage-gated potassium channel complex
IEA
GO_REF:0000120
ACCEPT
Summary: CALM1 regulates voltage-gated potassium channels like KCNQ.
Reason: Well-documented interaction with KCNQ channels. PMID:27564677 shows CALM1 binding to KCNQ/M-channels. Important for neuronal excitability and cardiac repolarization.
Supporting Evidence:
PMID:27564677
Structural Insights into the M-Channel Proximal C-Terminus/Calmodulin Complex
GO:0016020 membrane
IEA
GO_REF:0000107
REMOVE
Summary: Too general - specific membrane systems are better annotated.
Reason: Generic membrane annotation adds no value beyond specific membrane localizations already annotated (plasma membrane, ER contacts, etc.). Based on ortholog transfer.
Supporting Evidence:
GO_REF:0000107
Automatic transfer of experimentally verified manual GO annotation data to orthologs
GO:0031982 vesicle
IEA
GO_REF:0000107
KEEP AS NON CORE
Summary: General vesicle localization supported by exosome study.
Reason: HDA evidence (PMID:19190083) shows presence in exosome-like vesicles from epithelium. Valid but not core function - likely reflects calcium role in vesicle trafficking.
Supporting Evidence:
PMID:19190083
Characterization of exosome-like vesicles released from human tracheobronchial ciliated epithelium: a possible role in innate defense
GO:0043209 myelin sheath
IEA
GO_REF:0000120
KEEP AS NON CORE
Summary: Duplicate myelin sheath annotation - already reviewed as non-core.
Reason: Same myelin localization as IBA annotation. Related to MBP interaction but specialized nervous system function.
Supporting Evidence:
PMID:19855925
Structural analysis of the complex between calmodulin and full-length myelin basic protein
GO:0044305 calyx of Held
IEA
GO_REF:0000120
REMOVE
Summary: Specialized synaptic localization in auditory brainstem.
Reason: Highly specialized neuroanatomical location based on automated annotation. No specific evidence for CALM1 enrichment or unique function at this giant synapse beyond general synaptic roles.
Supporting Evidence:
GO_REF:0000120
Combined Automated Annotation using Multiple IEA Methods
GO:0048306 calcium-dependent protein binding
IEA
GO_REF:0000107
ACCEPT
Summary: Core molecular function - CALM1 binding to targets is calcium-dependent, enabling signal transduction.
Reason: This captures the essential calcium-dependent nature of calmodulin interactions with target proteins. Upon calcium binding, CALM1 undergoes conformational changes enabling target binding. Fundamental to its function as a calcium sensor.
Supporting Evidence:
PMID:8631777
Blocking the Ca2+-induced conformational transitions in calmodulin with disulfide bonds
GO:0050848 regulation of calcium-mediated signaling
IEA
GO_REF:0000107
ACCEPT
Summary: Core function as master regulator of calcium signaling pathways.
Reason: This is the overarching biological process that CALM1 mediates - translating calcium signals into cellular responses through activation of various effectors. Central to its role as ubiquitous calcium sensor.
Supporting Evidence:
PMID:35568036
A family of conserved bacterial virulence factors dampens interferon responses by blocking calcium signaling
GO:0097225 sperm midpiece
IEA
GO_REF:0000107
KEEP AS NON CORE
Summary: Sperm-specific localization, not core function.
Reason: Based on ortholog evidence. CALM1 likely plays role in sperm motility through calcium signaling but this is specialized reproductive function, not core ubiquitous role.
Supporting Evidence:
GO_REF:0000107
Automatic transfer of experimentally verified manual GO annotation data to orthologs
GO:0099523 presynaptic cytosol
IEA
GO_REF:0000107
KEEP AS NON CORE
Summary: Neuronal synaptic localization for neurotransmitter release regulation.
Reason: Valid neuronal localization where CALM1 regulates synaptic vesicle release. Based on ortholog evidence. Important for synaptic function but tissue-specific rather than core.
Supporting Evidence:
GO_REF:0000107
Automatic transfer of experimentally verified manual GO annotation data to orthologs
GO:0140238 presynaptic endocytosis
IEA
GO_REF:0000120
KEEP AS NON CORE
Summary: Synaptic vesicle recycling function in neurons.
Reason: Valid neuronal function where CALM1 regulates synaptic vesicle endocytosis through calcium signaling. Tissue-specific process rather than core ubiquitous function.
Supporting Evidence:
GO_REF:0000120
Combined Automated Annotation using Multiple IEA Methods
GO:0141110 transporter inhibitor activity
IEA
GO_REF:0000107
REMOVE
Summary: Too general - specific channel regulation functions are better annotated.
Reason: This generic transporter inhibitor term is less informative than the specific calcium channel and ion channel regulatory annotations already present. Based on ortholog transfer and redundant with more specific terms.
Supporting Evidence:
GO_REF:0000107
Automatic transfer of experimentally verified manual GO annotation data to orthologs
GO:1905913 negative regulation of calcium ion export across plasma membrane
IEA
GO_REF:0000107
KEEP AS NON CORE
Summary: Calcium homeostasis function through pump/exchanger regulation.
Reason: Valid function in calcium homeostasis but based on ortholog inference. Less central than direct channel regulation functions. May involve plasma membrane Ca2+-ATPase regulation.
Supporting Evidence:
GO_REF:0000107
Automatic transfer of experimentally verified manual GO annotation data to orthologs
GO:0010881 regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion
IDA
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and su...
ACCEPT
Summary: Duplicate IDA annotation - core cardiac function.
Reason: Same core cardiac function already annotated with IEA. Strong experimental evidence from calmodulinopathy study.
Supporting Evidence:
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and sudden cardiac death
GO:1901844 regulation of cell communication by electrical coupling involved in cardiac conduction
IDA
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and su...
ACCEPT
Summary: Duplicate IDA annotation - already covered by IEA.
Reason: Same cardiac conduction function as IEA annotation but with direct experimental evidence from human genetics.
Supporting Evidence:
PMID:23040497
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a devastating inherited disorder characterized by episodic syncope and/or sudden cardiac arrest
GO:0005246 calcium channel regulator activity
IDA
PMID:20226167
Defective calmodulin binding to the cardiac ryanodine recept...
ACCEPT
Summary: Duplicate IDA annotation for calcium channel regulation.
Reason: Same function as IEA annotation but with direct experimental evidence for RyR2 regulation.
Supporting Evidence:
PMID:20226167
Defective calmodulin binding to the cardiac ryanodine receptor plays a key role in CPVT-associated channel dysfunction
GO:0010881 regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion
IDA
PMID:20226167
Defective calmodulin binding to the cardiac ryanodine recept...
ACCEPT
Summary: Another duplicate - same cardiac function with different IDA evidence.
Reason: Same core function from different experimental study on CPVT and RyR2 regulation.
Supporting Evidence:
PMID:20226167
CPVT mutation causes defective inter-domain interaction, significant reduction in the ability of CaM binding to the RyR2, spontaneous Ca(2+) leak, and then lethal arrhythmia
GO:0060291 long-term synaptic potentiation
TAS
PMID:20668654
Structure of the CaMKIIdelta/calmodulin complex reveals the ...
KEEP AS NON CORE
Summary: Duplicate annotation with stronger evidence - neuronal function.
Reason: Same LTP function as IEA but with TAS evidence from CaMKII structural study. Important for learning/memory but tissue-specific.
Supporting Evidence:
PMID:20668654
Structure of the CaMKIIdelta/calmodulin complex reveals the molecular mechanism of CaMKII kinase activation
GO:0097720 calcineurin-mediated signaling
IDA
PMID:8631777
Blocking the Ca2+-induced conformational transitions in calm...
ACCEPT
Summary: Duplicate with direct experimental evidence for calcineurin signaling.
Reason: Same core function as IBA/IEA annotations but with direct biochemical evidence.
Supporting Evidence:
PMID:8631777
Blocking the Ca2+-induced conformational transitions in calmodulin with disulfide bonds
GO:0005829 cytosol
TAS
Reactome:R-HSA-6786205
ACCEPT
Summary: Cytosolic localization for methylation by KAMKMT.
Reason: TAS evidence from Reactome for cytosolic localization where CALM1 undergoes trimethylation. Core compartment for CALM1 function.
Supporting Evidence:
Reactome:R-HSA-6786205
KAMKMT transfers 3xCH3 groups from 3xAdoMet to CALM1
GO:0005515 protein binding
IPI
PMID:11807546
Structural basis for the activation of anthrax adenylyl cycl...
MODIFY
Summary: Binding to anthrax adenylyl cyclase exotoxin - should be more specific.
Reason: While interaction with anthrax toxin is valid (PMID:11807546), generic protein binding uninformative. The adenylate cyclase activator activity annotation better captures this function.
Supporting Evidence:
PMID:11807546
Structural basis for the activation of anthrax adenylyl cyclase exotoxin by calmodulin
GO:0005515 protein binding
IPI
PMID:11984006
The Chediak-Higashi protein interacts with SNARE complex and...
KEEP AS NON CORE
Summary: Interaction with Chediak-Higashi protein/LYST - specialized vesicle trafficking function.
Reason: IPI evidence (PMID:11984006) shows interaction with CHS protein involved in vesicle trafficking. Valid but specialized function, not core to CALM1 primary role.
Supporting Evidence:
PMID:11984006
The Chediak-Higashi protein interacts with SNARE complex and signal transduction proteins
GO:0005515 protein binding
IPI
PMID:19855925
Structural analysis of the complex between calmodulin and fu...
KEEP AS NON CORE
Summary: Binding to myelin basic protein - relevant for myelin sheath localization.
Reason: IPI evidence (PMID:19855925) demonstrates calmodulin-MBP complex formation. Relevant for nervous system function but not core ubiquitous role.
Supporting Evidence:
PMID:19855925
Structural analysis of the complex between calmodulin and full-length myelin basic protein, an intrinsically disordered molecule
GO:0005515 protein binding
IPI
PMID:27564677
Structural Insights into the M-Channel Proximal C-Terminus/C...
REMOVE
Summary: Binding to KCNQ/M-channels - more specific annotation available.
Reason: Generic protein binding for KCNQ channel interaction. The voltage-gated potassium channel complex annotation (GO:0008076) better captures this specific interaction.
Supporting Evidence:
PMID:27564677
Structural Insights into the M-Channel Proximal C-Terminus/Calmodulin Complex
GO:0043539 protein serine/threonine kinase activator activity
IDA
PMID:35568036
A family of conserved bacterial virulence factors dampens in...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:35568036
2022 May 13. A family of conserved bacterial virulence factors dampens interferon responses by blocking calcium signaling.
GO:0005509 calcium ion binding
IDA
PMID:35568036
A family of conserved bacterial virulence factors dampens in...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:35568036
2022 May 13. A family of conserved bacterial virulence factors dampens interferon responses by blocking calcium signaling.
GO:0035458 cellular response to interferon-beta
IDA
PMID:35568036
A family of conserved bacterial virulence factors dampens in...
ACCEPT
Summary: CALM1 mediates interferon signaling through CaMKII and JAK/STAT pathway activation.
Reason: IDA evidence (PMID:35568036) demonstrates CALM1 role in IFN-β response through calcium signaling to CaMKII and JAK/STAT. Bacterial pathogens target this pathway by sequestering calmodulin.
Supporting Evidence:
PMID:35568036
IFN inhibition was mediated by the binding of OspC1 and OspC3 to the Ca2+ sensor calmodulin (CaM), blocking CaM kinase II and downstream JAK/STAT signaling
GO:0043539 protein serine/threonine kinase activator activity
IDA
PMID:14722083
Comparative analyses of the three-dimensional structures and...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:14722083
2004 Jan 12. Comparative analyses of the three-dimensional structures and enzymatic properties of alpha, beta, gamma and delta isoforms of Ca2+-calmodulin-dependent protein kinase II.
GO:0046427 positive regulation of receptor signaling pathway via JAK-STAT
IDA
PMID:11972023
Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphoryla...
ACCEPT
Summary: CALM1/CaMKII required for STAT1 phosphorylation in interferon response.
Reason: IDA evidence shows calcium/calmodulin and CaMKII are required for IFN-γ-induced STAT1 Ser-727 phosphorylation. Important for immune signaling.
Supporting Evidence:
PMID:11972023
Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphorylation in response to IFN-gamma
GO:0046427 positive regulation of receptor signaling pathway via JAK-STAT
IDA
PMID:35568036
A family of conserved bacterial virulence factors dampens in...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:35568036
2022 May 13. A family of conserved bacterial virulence factors dampens interferon responses by blocking calcium signaling.
GO:0071346 cellular response to type II interferon
IDA
PMID:11972023
Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphoryla...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:11972023
Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphorylation in response to IFN-gamma.
GO:0005515 protein binding
IPI
PMID:28890335
The ER-Localized Transmembrane Protein EPG-3/VMP1 Regulates ...
REMOVE
Summary: EPG-3/VMP1 interaction for autophagy - more specific annotations present.
Reason: Generic protein binding redundant with more specific autophagosome and organelle tethering annotations from same paper that better describe the functional interaction.
Supporting Evidence:
PMID:28890335
The ER-Localized Transmembrane Protein EPG-3/VMP1 Regulates SERCA Activity
GO:0016240 autophagosome membrane docking
IDA
PMID:28890335
The ER-Localized Transmembrane Protein EPG-3/VMP1 Regulates ...
KEEP AS NON CORE
Summary: CALM1 involved in ER-autophagosome contacts through EPG-3/VMP1 regulation.
Reason: IDA evidence (PMID:28890335) shows role in autophagy regulation through SERCA/calcium signaling. Valid but specialized function, not core to CALM1 primary role as calcium sensor.
Supporting Evidence:
PMID:28890335
The ER-Localized Transmembrane Protein EPG-3/VMP1 Regulates SERCA Activity to Control ER-Isolation Membrane Contacts for Autophagosome Formation
GO:0140056 organelle localization by membrane tethering
IDA
PMID:28890335
The ER-Localized Transmembrane Protein EPG-3/VMP1 Regulates ...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:28890335
Epub 2017 Sep 7. The ER-Localized Transmembrane Protein EPG-3/VMP1 Regulates SERCA Activity to Control ER-Isolation Membrane Contacts for Autophagosome Formation.
GO:1990456 mitochondrion-endoplasmic reticulum membrane tethering
IDA
PMID:28890335
The ER-Localized Transmembrane Protein EPG-3/VMP1 Regulates ...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:28890335
Epub 2017 Sep 7. The ER-Localized Transmembrane Protein EPG-3/VMP1 Regulates SERCA Activity to Control ER-Isolation Membrane Contacts for Autophagosome Formation.
GO:0005509 calcium ion binding
IDA
PMID:31454269
Genetic Mosaicism in Calmodulinopathy.
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:31454269
Genetic Mosaicism in Calmodulinopathy.
GO:0098901 regulation of cardiac muscle cell action potential
IMP
PMID:31454269
Genetic Mosaicism in Calmodulinopathy.
ACCEPT
Summary: Core cardiac function - CALM1 mutations disrupt action potential regulation causing arrhythmias.
Reason: IMP evidence (PMID:31454269) from genetic mosaicism study shows CALM1 mutations directly affect cardiac action potentials. Essential for normal cardiac electrophysiology.
Supporting Evidence:
PMID:31454269
Genetic Mosaicism in Calmodulinopathy
GO:1901842 negative regulation of high voltage-gated calcium channel activity
IMP
PMID:31454269
Genetic Mosaicism in Calmodulinopathy.
ACCEPT
Summary: Important calcium channel regulation - CALM1 negatively regulates L-type calcium channels.
Reason: IMP evidence (PMID:31454269) demonstrates CALM1 regulation of high voltage-gated calcium channels. Mutations disrupt this regulation contributing to calmodulinopathies.
Supporting Evidence:
PMID:31454269
Genetic Mosaicism in Calmodulinopathy
GO:0005515 protein binding
IPI
PMID:30021165
Regulation of KIF1A-Driven Dense Core Vesicle Transport: Ca(...
KEEP AS NON CORE
Summary: KIF1A motor protein interaction for vesicle transport.
Reason: IPI evidence (PMID:30021165) shows CALM1 regulates KIF1A-driven dense core vesicle transport. Specialized neuronal function for neurosecretion.
Supporting Evidence:
PMID:30021165
Regulation of KIF1A-Driven Dense Core Vesicle Transport: Ca(2+)/CaM Controls DCV Binding and Liprin-α/TANC2 Recruits DCVs to Postsynaptic Sites
GO:0005515 protein binding
IPI
PMID:30287853
Calcineurin B homologous protein 3 binds with high affinity ...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:30287853
Calcineurin B homologous protein 3 binds with high affinity to the CHP binding domain of the human sodium/proton exchanger NHE1.
GO:0010856 adenylate cyclase activator activity
IDA
PMID:11807546
Structural basis for the activation of anthrax adenylyl cycl...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:11807546
Structural basis for the activation of anthrax adenylyl cyclase exotoxin by calmodulin.
GO:0034704 calcium channel complex
IDA
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and su...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and sudden cardiac death.
GO:0000922 spindle pole
IDA
PMID:16760425
CP110 cooperates with two calcium-binding proteins to regula...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:16760425
Jun 7. CP110 cooperates with two calcium-binding proteins to regulate cytokinesis and genome stability.
GO:0005515 protein binding
IPI
PMID:10692436
Ca(2+)-dependent and Ca(2+)-independent calmodulin binding s...
KEEP AS NON CORE
Summary: Binding to erythrocyte protein 4.1 for membrane-cytoskeleton linkage.
Reason: IPI evidence (PMID:10692436) shows calcium-dependent and independent binding to protein 4.1. Specialized erythrocyte function for membrane-cytoskeleton regulation.
Supporting Evidence:
PMID:10692436
Ca(2+)-dependent and Ca(2+)-independent calmodulin binding sites in erythrocyte protein 4.1
GO:0005515 protein binding
IPI
PMID:15140941
Ca2+-binding protein-1 facilitates and forms a postsynaptic ...
MODIFY
Summary: Binding to Ca2+-binding protein-1/CaBP1 and Cav1.2 channels.
Reason: While interaction is valid, this relates to calcium channel regulation already covered by GO:0005246 and GO:0034704. Generic protein binding uninformative.
Supporting Evidence:
PMID:15140941
Ca2+-binding protein-1 facilitates and forms a postsynaptic complex with Cav1.2 (L-type) Ca2+ channels
GO:0005515 protein binding
IPI
PMID:15632291
Myristoyl moiety of HIV Nef is involved in regulation of the...
KEEP AS NON CORE
Summary: Binding to HIV Nef protein - pathogen interaction.
Reason: IPI evidence (PMID:15632291) shows interaction with HIV Nef myristoyl moiety. Example of pathogen hijacking CALM1 but not core function.
Supporting Evidence:
PMID:15632291
Myristoyl moiety of HIV Nef is involved in regulation of the interaction with calmodulin in vivo
GO:0005515 protein binding
IPI
PMID:16760425
CP110 cooperates with two calcium-binding proteins to regula...
REMOVE
Summary: CP110 binding for cytokinesis - better captured by specific annotations.
Reason: CP110 interaction already well-covered by centrosome localization and cytokinesis regulation annotations. Generic protein binding redundant.
Supporting Evidence:
PMID:16760425
CP110 cooperates with two calcium-binding proteins to regulate cytokinesis and genome stability
GO:0005515 protein binding
IPI
PMID:21299499
IQ-motif selectivity in human IQGAP2 and IQGAP3: binding of ...
KEEP AS NON CORE
Summary: IQGAP binding for cytoskeletal regulation.
Reason: IPI evidence (PMID:21299499) shows IQ-motif binding to IQGAP2/3. Important for cytoskeletal regulation but not core universal function.
Supporting Evidence:
PMID:21299499
IQ-motif selectivity in human IQGAP2 and IQGAP3: binding of calmodulin and myosin essential light chain
GO:0005515 protein binding
IPI
PMID:3111527
Comparison of S100b protein with calmodulin: interactions wi...
KEEP AS NON CORE
Summary: Interaction with tau proteins and melittin.
Reason: IPI evidence (PMID:3111527) shows interaction with tau proteins. Relevant for neurodegeneration but not core function.
Supporting Evidence:
PMID:3111527
Comparison of S100b protein with calmodulin: interactions with melittin and microtubule-associated tau proteins
GO:0005634 nucleus
HDA
PMID:21630459
Proteomic characterization of the human sperm nucleus.
KEEP AS NON CORE
Summary: Sperm nuclear localization from proteomics.
Reason: HDA evidence from sperm nucleus proteomics. Specialized reproductive cell localization, not core.
Supporting Evidence:
PMID:21630459
Proteomic characterization of the human sperm nucleus
GO:0005737 cytoplasm
TAS
PMID:10899953
Calmodulin regulation of basal and agonist-stimulated G prot...
ACCEPT
Summary: Core cytoplasmic localization with TAS evidence.
Reason: TAS evidence confirms primary cytoplasmic localization where CALM1 performs most functions.
Supporting Evidence:
PMID:10899953
Calmodulin regulation of basal and agonist-stimulated G protein coupling by the mu-opioid receptor
GO:0005813 centrosome
IDA
PMID:16760425
CP110 cooperates with two calcium-binding proteins to regula...
ACCEPT
Summary: Direct experimental evidence for centrosomal localization.
Reason: IDA evidence directly demonstrates centrosomal localization and functional importance for cytokinesis.
Supporting Evidence:
PMID:16760425
CP110 cooperates with two calcium-binding proteins to regulate cytokinesis and genome stability
GO:0005876 spindle microtubule
IDA
PMID:16760425
CP110 cooperates with two calcium-binding proteins to regula...
ACCEPT
Summary: Direct evidence for spindle microtubule localization.
Reason: IDA evidence confirms spindle microtubule localization essential for mitosis and cytokinesis.
Supporting Evidence:
PMID:16760425
depletion leads to a failure at a late stage of cytokinesis and the formation of binucleate cells
GO:0005886 plasma membrane
TAS
PMID:10899953
Calmodulin regulation of basal and agonist-stimulated G prot...
ACCEPT
Summary: Plasma membrane localization for GPCR regulation.
Reason: TAS evidence shows plasma membrane localization for G protein-coupled receptor regulation. Important for membrane-associated signaling.
Supporting Evidence:
PMID:10899953
Calmodulin regulation of basal and agonist-stimulated G protein coupling by the mu-opioid receptor
GO:0007186 G protein-coupled receptor signaling pathway
TAS
PMID:10899953
Calmodulin regulation of basal and agonist-stimulated G prot...
ACCEPT
Summary: CALM1 regulates GPCR signaling, particularly opioid receptors.
Reason: TAS evidence shows CALM1 regulation of mu-opioid receptor and GPCR signaling. Important signaling pathway regulation.
Supporting Evidence:
PMID:10899953
Calmodulin regulation of basal and agonist-stimulated G protein coupling by the mu-opioid receptor
GO:0021762 substantia nigra development
HEP
PMID:22926577
Quantitative proteomic analysis of human substantia nigra in...
REMOVE
Summary: Expression in substantia nigra but not functionally validated for development.
Reason: HEP (high-throughput expression pattern) evidence only shows CALM1 expression in substantia nigra from proteomic study. No functional validation for developmental role. Expression does not equal function.
Supporting Evidence:
PMID:22926577
Quantitative proteomic analysis of human substantia nigra in Alzheimer's disease, Huntington's disease and Multiple sclerosis
GO:0031982 vesicle
HDA
PMID:19190083
Characterization of exosome-like vesicles released from huma...
KEEP AS NON CORE
Summary: Presence in exosome-like vesicles from epithelium.
Reason: HDA evidence from exosome proteomics. Reflects vesicular trafficking role but not core function.
Supporting Evidence:
PMID:19190083
Characterization of exosome-like vesicles released from human tracheobronchial ciliated epithelium: a possible role in innate defense
GO:0032465 regulation of cytokinesis
IMP
PMID:16760425
CP110 cooperates with two calcium-binding proteins to regula...
ACCEPT
Summary: Direct functional evidence for cytokinesis regulation.
Reason: IMP evidence shows CALM1 depletion causes cytokinesis failure. Essential for proper cell division completion.
Supporting Evidence:
PMID:16760425
its depletion leads to a failure at a late stage of cytokinesis and the formation of binucleate cells, mirroring the defects resulting from ablation of either CaM or centrin function
GO:0005509 calcium ion binding
IDA
PMID:11807546
Structural basis for the activation of anthrax adenylyl cycl...
ACCEPT
Summary: Duplicate calcium binding with anthrax toxin study evidence.
Reason: Core function with IDA evidence from structural study with anthrax adenylyl cyclase.
Supporting Evidence:
PMID:11807546
Structural basis for the activation of anthrax adenylyl cyclase exotoxin by calmodulin
GO:0032991 protein-containing complex
IDA
PMID:19855925
Structural analysis of the complex between calmodulin and fu...
ACCEPT
Summary: Calmodulin functions as a core component of various protein-containing complexes, including calcium-dependent kinase complexes and phosphatase complexes that are essential for calcium signaling.
Reason: Protein-containing complex localization is fundamental to calmodulin's function as a calcium sensor that regulates multiple enzymes through direct protein-protein interactions in multiprotein complexes.
Supporting Evidence:
PMID:19855925
Structural analysis of the complex between calmodulin and full-length myelin basic protein
GO:1902494 catalytic complex
IDA
PMID:11807546
Structural basis for the activation of anthrax adenylyl cycl...
ACCEPT
Summary: Calmodulin forms catalytic complexes with adenylate cyclases in calcium-dependent manner to regulate cAMP signaling. This represents a core regulatory mechanism for calcium-dependent activation of adenylate cyclase.
Reason: Catalytic complex formation is central to calmodulin's function as an adenylate cyclase activator, enabling calcium-dependent regulation of cAMP production in G protein-coupled receptor signaling pathways.
Supporting Evidence:
PMID:11807546
Structural basis for the activation of anthrax adenylyl cyclase exotoxin by calmodulin
GO:0005576 extracellular region
TAS
Reactome:R-HSA-482772
KEEP AS NON CORE
Summary: Extracellular release from platelets.
Reason: TAS from Reactome showing platelet release of cytosolic components. Specialized platelet function, not core.
Supporting Evidence:
Reactome:R-HSA-482772
Release of platelet cytosolic components
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-111915
ACCEPT
Summary: Nuclear localization for CAMK4 regulation.
Reason: Nucleoplasm is a core localization for calmodulin (CALM1), which regulates nuclear proteins and transcription factors. This annotation is correct regardless of specific pathway context.
Supporting Evidence:
Reactome:R-HSA-111915
CAMK4 autophosphorylates
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-2730867
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-442749
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005654 nucleoplasm
TAS
Reactome:R-HSA-4551465
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005654 nucleoplasm
TAS
Reactome:R-NUL-9618916
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005654 nucleoplasm
TAS
Reactome:R-NUL-9619177
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005886 plasma membrane
TAS
Reactome:R-HSA-202110
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005886 plasma membrane
TAS
Reactome:R-HSA-202111
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005886 plasma membrane
TAS
Reactome:R-HSA-202129
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005886 plasma membrane
TAS
Reactome:R-HSA-202137
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005886 plasma membrane
TAS
Reactome:R-HSA-202144
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005886 plasma membrane
TAS
Reactome:R-HSA-5626549
ACCEPT
Summary: Reactome pathway annotation for CALM1 in plasma membrane.
Reason: Plasma membrane is a core localization for calmodulin (CALM1), which regulates numerous membrane-associated proteins and ion channels. This annotation is correct regardless of specific pathway context.
Supporting Evidence:
Reactome:R-HSA-2730867
Translocation of CaN:CaM:NFAT to nucleus
GO:0005829 cytosol
TAS
Reactome:R-HSA-111966
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-1497784
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-1497796
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-1497810
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-1855153
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-202110
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-202111
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-202127
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-202129
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-2025890
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-2730849
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-2730867
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-2730872
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-3229181
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-4332358
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-4332359
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-4332363
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-445797
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-445813
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-451283
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-451311
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-4551451
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-4551465
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-482772
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-5672965
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-71541
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-71588
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9618785
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9619355
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9619376
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9653585
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9654521
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9654523
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9654525
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9654533
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-HSA-9865670
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-NUL-9617449
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-NUL-9619243
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-NUL-9619396
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0005829 cytosol
TAS
Reactome:R-NUL-9619413
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
GO:0002027 regulation of heart rate
IMP
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and su...
ACCEPT
Summary: Duplicate with IMP evidence for core cardiac function.
Reason: IMP evidence from calmodulinopathy study directly demonstrates role in heart rate regulation. CALM1 mutations cause arrhythmias.
Supporting Evidence:
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and sudden cardiac death
GO:0005509 calcium ion binding
IDA
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and su...
ACCEPT
Summary: Another duplicate with IDA evidence from calmodulinopathy study.
Reason: Core function with direct experimental evidence from disease mutation study.
Supporting Evidence:
PMID:23040497
Both CALM1 substitutions demonstrated compromised calcium binding
GO:0005509 calcium ion binding
IDA
PMID:7607248
A calmodulin-binding sequence in the C-terminus of human car...
ACCEPT
Summary: Duplicate with IDA evidence from titin kinase study.
Reason: Core function demonstrated in cardiac titin kinase binding study.
Supporting Evidence:
PMID:7607248
A calmodulin-binding sequence in the C-terminus of human cardiac titin kinase
GO:0005509 calcium ion binding
IDA
PMID:8631777
Blocking the Ca2+-induced conformational transitions in calm...
ACCEPT
Summary: Duplicate with IDA evidence from calmodulin conformational study.
Reason: Core function with biochemical evidence on calcium-induced conformational changes.
Supporting Evidence:
PMID:8631777
Blocking the Ca2+-induced conformational transitions in calmodulin with disulfide bonds
GO:0005513 detection of calcium ion
IMP
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and su...
ACCEPT
Summary: Core calcium sensing with IMP evidence from disease study.
Reason: Functional evidence shows CALM1 mutations impair calcium sensing causing cardiac disease.
Supporting Evidence:
PMID:23040497
Both CALM1 substitutions demonstrated compromised calcium binding, and p.Asn97Ser displayed an aberrant interaction with the RYR2 calmodulin-binding-domain peptide at low calcium concentrations
GO:0010880 regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum
IDA
PMID:20226167
Defective calmodulin binding to the cardiac ryanodine recept...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:20226167
Defective calmodulin binding to the cardiac ryanodine receptor plays a key role in CPVT-associated channel dysfunction.
GO:0019901 protein kinase binding
IPI
PMID:20668654
Structure of the CaMKIIdelta/calmodulin complex reveals the ...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:20668654
Structure of the CaMKIIdelta/calmodulin complex reveals the molecular mechanism of CaMKII kinase activation.
GO:0030017 sarcomere
IDA
PMID:20226167
Defective calmodulin binding to the cardiac ryanodine recept...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:20226167
Defective calmodulin binding to the cardiac ryanodine receptor plays a key role in CPVT-associated channel dysfunction.
GO:0031432 titin binding
IPI
PMID:7607248
A calmodulin-binding sequence in the C-terminus of human car...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:7607248
A calmodulin-binding sequence in the C-terminus of human cardiac titin kinase.
GO:0043539 protein serine/threonine kinase activator activity
TAS
PMID:20668654
Structure of the CaMKIIdelta/calmodulin complex reveals the ...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:20668654
Structure of the CaMKIIdelta/calmodulin complex reveals the molecular mechanism of CaMKII kinase activation.
GO:0044325 transmembrane transporter binding
IPI
PMID:21167176
Solution NMR structure of Apo-calmodulin in complex with the...
ACCEPT
Summary: CALM1 binds IQ motif of cardiac sodium channel NaV1.5 for regulation.
Reason: IPI evidence (PMID:21167176) demonstrates specific binding to sodium channel NaV1.5 IQ motif. Important for cardiac ion channel regulation beyond just calcium channels.
Supporting Evidence:
PMID:21167176
Solution NMR structure of Apo-calmodulin in complex with the IQ motif of human cardiac sodium channel NaV1.5
GO:0044325 transmembrane transporter binding
IPI
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and su...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and sudden cardiac death.
GO:0051592 response to calcium ion
IDA
PMID:7607248
A calmodulin-binding sequence in the C-terminus of human car...
ACCEPT
Summary: CALM1 responds to calcium through conformational change and target binding.
Reason: IDA evidence shows calcium-dependent response through titin kinase binding. Core mechanism of CALM1 function.
Supporting Evidence:
PMID:7607248
A calmodulin-binding sequence in the C-terminus of human cardiac titin kinase
GO:0055117 regulation of cardiac muscle contraction
IMP
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and su...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:23040497
Mutations in calmodulin cause ventricular tachycardia and sudden cardiac death.
GO:0072542 protein phosphatase activator activity
IDA
PMID:8631777
Blocking the Ca2+-induced conformational transitions in calm...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:8631777
Blocking the Ca2+-induced conformational transitions in calmodulin with disulfide bonds.
GO:0005509 calcium ion binding
IDA
PMID:26164367
Distinctive malfunctions of calmodulin mutations associated ...
ACCEPT
Summary: Duplicate with IDA evidence from RyR2 arrhythmia study.
Reason: Core function studied in context of calmodulin mutations and RyR2-mediated disease.
Supporting Evidence:
PMID:26164367
Distinctive malfunctions of calmodulin mutations associated with heart RyR2-mediated arrhythmic disease
GO:0005509 calcium ion binding
IDA
PMID:26969752
Spectrum and Prevalence of CALM1-, CALM2-, and CALM3-Encoded...
ACCEPT
Summary: Duplicate with IDA evidence from LQTS study.
Reason: Core function studied in Long QT syndrome mutations.
Supporting Evidence:
PMID:26969752
Spectrum and Prevalence of CALM1-, CALM2-, and CALM3-Encoded Calmodulin Variants in Long QT Syndrome
GO:0005509 calcium ion binding
IDA
PMID:27516456
Novel CPVT-Associated Calmodulin Mutation in CALM3 (CALM3-A1...
ACCEPT
Summary: Duplicate with IDA evidence from CPVT mutation study.
Reason: Core function studied in CPVT-associated CALM3-A103V mutation.
Supporting Evidence:
PMID:27516456
Novel CPVT-Associated Calmodulin Mutation in CALM3 (CALM3-A103V) Activates Arrhythmogenic Ca Waves and Sparks
GO:0005737 cytoplasm
IDA
PMID:27165696
Arrhythmogenic calmodulin mutations impede activation of sma...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:27165696
2016 May 7. Arrhythmogenic calmodulin mutations impede activation of small-conductance calcium-activated potassium current.
GO:0019855 calcium channel inhibitor activity
IDA
PMID:26969752
Spectrum and Prevalence of CALM1-, CALM2-, and CALM3-Encoded...
ACCEPT
Summary: CALM1 inhibits calcium channels - mutations cause Long QT syndrome through loss of inhibition.
Reason: IDA evidence (PMID:26969752) from LQTS study shows CALM1 inhibits calcium channels. E141G mutation impairs this function causing LQTS. Important negative regulatory function.
Supporting Evidence:
PMID:26969752
Spectrum and Prevalence of CALM1-, CALM2-, and CALM3-Encoded Calmodulin Variants in Long QT Syndrome and Functional Characterization of a Novel Long QT Syndrome-Associated Calmodulin Missense Variant, E141G
GO:0060314 regulation of ryanodine-sensitive calcium-release channel activity
IDA
PMID:22067155
FRET detection of calmodulin binding to the cardiac RyR2 cal...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:22067155
Nov 1. FRET detection of calmodulin binding to the cardiac RyR2 calcium release channel.
GO:0060315 negative regulation of ryanodine-sensitive calcium-release channel activity
IDA
PMID:26164367
Distinctive malfunctions of calmodulin mutations associated ...
ACCEPT
Summary: Core cardiac function - CALM1 negatively regulates RyR2 to prevent calcium leak and arrhythmias.
Reason: IDA evidence (PMID:26164367) shows CALM1 inhibits RyR2 activity. Disease mutations impair this inhibition causing CPVT through excessive calcium release. Essential for cardiac calcium homeostasis.
Supporting Evidence:
PMID:26164367
Distinctive malfunctions of calmodulin mutations associated with heart RyR2-mediated arrhythmic disease
GO:0005515 protein binding
IPI
PMID:16127172
Calcium/calmodulin regulates ubiquitination of the ubiquitin...
ACCEPT
Summary: Reactome pathway annotation - see individual pathways for specific functions
Reason: TAS evidence from curated Reactome pathways. These annotations reflect the diverse cellular processes involving CALM1.
Supporting Evidence:
PMID:16127172
2005 Aug 26. Calcium/calmodulin regulates ubiquitination of the ubiquitin-specific protease TRE17/USP6.
GO:0005509 calcium ion binding
IDA
PMID:27564677
Structural Insights into the M-Channel Proximal C-Terminus/C...
ACCEPT
Summary: Duplicate with IDA evidence from M-channel/KCNQ study.
Reason: Core function demonstrated in structural study of KCNQ channel regulation.
Supporting Evidence:
PMID:27564677
Structural Insights into the M-Channel Proximal C-Terminus/Calmodulin Complex

Core Functions

Binds calcium ions through four EF-hand domains enabling conformational changes that regulate calcium-dependent enzymes and signaling pathways

Supporting Evidence:
  • PMID:23040497
    Both CALM1 substitutions demonstrated compromised calcium binding
  • PMID:31454269
    Calmodulin mutations are associated with a diversity of heart rhythm disorders, including LQTS, CPVT, idiopathic ventricular tachycardia, and sudden death

Activates protein serine/threonine kinases including CaMKII in calcium-dependent manner

Supporting Evidence:
  • PMID:35568036
    A family of conserved bacterial virulence factors dampens interferon responses by blocking calcium signaling
  • PMID:14722083
    Comparative analyses of the three-dimensional structures and enzymatic properties of alpha, beta, gamma and delta isoforms of Ca2+-calmodulin-dependent protein kinase II

Activates calcineurin phosphatase in calcium-dependent manner to dephosphorylate substrates including NFAT transcription factors

Supporting Evidence:
  • PMID:8631777
    Blocking the Ca2+-induced conformational transitions in calmodulin with disulfide bonds

Regulates cardiac and skeletal muscle calcium channels including ryanodine receptor RyR2 and L-type calcium channels to control calcium release and excitation-contraction coupling

Supporting Evidence:
  • PMID:20226167
    Defective calmodulin binding to the cardiac ryanodine receptor plays a key role in CPVT-associated channel dysfunction
  • PMID:23040497
    Mutations in calmodulin cause ventricular tachycardia and sudden cardiac death

Activates adenylate cyclase in calcium-dependent manner for cAMP signaling

Supporting Evidence:
  • PMID:11807546
    Structural basis for the activation of anthrax adenylyl cyclase exotoxin by calmodulin

Regulates cytokinesis through calcium-dependent interaction with centrosomal protein CP110

Supporting Evidence:
  • PMID:16760425
    CP110 cooperates with two calcium-binding proteins to regulate cytokinesis and genome stability

References

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.
Automatic transfer of experimentally verified manual GO annotation data to orthologs using Ensembl Compara.
Electronic Gene Ontology annotations created by ARBA machine learning models
Combined Automated Annotation using Multiple IEA Methods.
Ca(2+)-dependent and Ca(2+)-independent calmodulin binding sites in erythrocyte protein 4.1. Implications for regulation of protein 4.1 interactions with transmembrane proteins.
Calmodulin regulation of basal and agonist-stimulated G protein coupling by the mu-opioid receptor (OP(3)) in morphine-pretreated cell.
Structural basis for the activation of anthrax adenylyl cyclase exotoxin by calmodulin.
Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphorylation in response to IFN-gamma.
The Chediak-Higashi protein interacts with SNARE complex and signal transduction proteins.
Comparative analyses of the three-dimensional structures and enzymatic properties of alpha, beta, gamma and delta isoforms of Ca2+-calmodulin-dependent protein kinase II.
Ca2+-binding protein-1 facilitates and forms a postsynaptic complex with Cav1.2 (L-type) Ca2+ channels.
Myristoyl moiety of HIV Nef is involved in regulation of the interaction with calmodulin in vivo.
Calcium/calmodulin regulates ubiquitination of the ubiquitin-specific protease TRE17/USP6.
CP110 cooperates with two calcium-binding proteins to regulate cytokinesis and genome stability.
Characterization of exosome-like vesicles released from human tracheobronchial ciliated epithelium: a possible role in innate defense.
Structural analysis of the complex between calmodulin and full-length myelin basic protein, an intrinsically disordered molecule.
Defective calmodulin binding to the cardiac ryanodine receptor plays a key role in CPVT-associated channel dysfunction.
Structure of the CaMKIIdelta/calmodulin complex reveals the molecular mechanism of CaMKII kinase activation.
Solution NMR structure of Apo-calmodulin in complex with the IQ motif of human cardiac sodium channel NaV1.5.
IQ-motif selectivity in human IQGAP2 and IQGAP3: binding of calmodulin and myosin essential light chain.
Proteomic characterization of the human sperm nucleus.
FRET detection of calmodulin binding to the cardiac RyR2 calcium release channel.
Quantitative proteomic analysis of human substantia nigra in Alzheimer's disease, Huntington's disease and Multiple sclerosis.
Mutations in calmodulin cause ventricular tachycardia and sudden cardiac death.
Distinctive malfunctions of calmodulin mutations associated with heart RyR2-mediated arrhythmic disease.
Spectrum and Prevalence of CALM1-, CALM2-, and CALM3-Encoded Calmodulin Variants in Long QT Syndrome and Functional Characterization of a Novel Long QT Syndrome-Associated Calmodulin Missense Variant, E141G.
Arrhythmogenic calmodulin mutations impede activation of small-conductance calcium-activated potassium current.
Novel CPVT-Associated Calmodulin Mutation in CALM3 (CALM3-A103V) Activates Arrhythmogenic Ca Waves and Sparks.
Structural Insights into the M-Channel Proximal C-Terminus/Calmodulin Complex.
The ER-Localized Transmembrane Protein EPG-3/VMP1 Regulates SERCA Activity to Control ER-Isolation Membrane Contacts for Autophagosome Formation.
Regulation of KIF1A-Driven Dense Core Vesicle Transport: Ca(2+)/CaM Controls DCV Binding and Liprin-α/TANC2 Recruits DCVs to Postsynaptic Sites.
Calcineurin B homologous protein 3 binds with high affinity to the CHP binding domain of the human sodium/proton exchanger NHE1.
An IQSEC2 Mutation Associated With Intellectual Disability and Autism Results in Decreased Surface AMPA Receptors.
Comparison of S100b protein with calmodulin: interactions with melittin and microtubule-associated tau proteins and inhibition of phosphorylation of tau proteins by protein kinase C.
Genetic Mosaicism in Calmodulinopathy.
Interaction between IDH1 WT and calmodulin and its implications for glioblastoma cell growth and migration.
OpenCell: Endogenous tagging for the cartography of human cellular organization.
A family of conserved bacterial virulence factors dampens interferon responses by blocking calcium signaling.
A calmodulin-binding sequence in the C-terminus of human cardiac titin kinase.
Blocking the Ca2+-induced conformational transitions in calmodulin with disulfide bonds.
Reactome:R-HSA-111915
CAMK4 autophosphorylates
Reactome:R-HSA-111966
GRK2 binds CALM1:4Ca2+
Reactome:R-HSA-1497784
The cofactor BH4 is required for electron transfer in the eNOS catalytic cycle
Reactome:R-HSA-1497796
BH2 binding can lead to eNOS uncoupling
Reactome:R-HSA-1497810
Uncoupled eNOS favours the formation of superoxide
Reactome:R-HSA-1855153
I(1,4,5)P3 is phosphorylated to I(1,3,4,5)P4 by ITPKA/B/C in the cytosol
Reactome:R-HSA-202110
eNOS:Caveolin-1 complex binds to CaM
Reactome:R-HSA-202111
AKT1 phosphorylates eNOS
Reactome:R-HSA-202127
eNOS synthesizes NO
Reactome:R-HSA-202129
HSP90 binds eNOS:Caveolin-1:CaM complex
Reactome:R-HSA-202137
AKT1 binds eNOS complex via HSP90
Reactome:R-HSA-202144
Caveolin-1 dissociates from eNOS:CaM:HSP90 complex
Reactome:R-HSA-2025890
Calcineurin binds NFATC1,2,3
Reactome:R-HSA-2730849
Calcineurin binds and dephosphorylates NFAT
Reactome:R-HSA-2730867
Translocation of CaN:CaM:NFAT to nucleus
Reactome:R-HSA-2730872
Activation of Calcineurin
Reactome:R-HSA-3229181
CALM1:Ca2+ binds CNG channel
Reactome:R-HSA-4332358
Dissociation of CaM and CAMK2 autophosphorylation
Reactome:R-HSA-4332359
Active calmodulin binds CAMK2
Reactome:R-HSA-4332363
Autophosphorylation and activation of CAMK2
Reactome:R-HSA-442749
CaMKK autophosphorylates in the nucleus
Reactome:R-HSA-445797
MYLK (MLCK) Active Calmodulin Binding
Reactome:R-HSA-445813
Phosphorylation of Smooth Muscle Myosin Light Chains
Reactome:R-HSA-451283
kainate receptor binds glutamate
Reactome:R-HSA-451311
Activation of Ca-permeable Kainate receptors
Reactome:R-HSA-4551451
Calcineurin binds and dephosphorylates NFAT1 in response to WNT/Ca2+ signaling
Reactome:R-HSA-4551465
Translocation of NFATC1:CaN:CaM to nucleus
Reactome:R-HSA-482772
Release of platelet cytosolic components
Reactome:R-HSA-5626549
IQGAPs bind CALM1
Reactome:R-HSA-5672965
RAS GEFs promote RAS nucleotide exchange
Reactome:R-HSA-6786205
KAMKMT transfers 3xCH3 groups from 3xAdoMet to CALM1
Reactome:R-HSA-71541
glycogen phosphorylase (PYGM) dimer b + 2 ATP => glycogen phosphorylase (PYGM) dimer a + 2 ADP
Reactome:R-HSA-71588
glycogen phosphorylase (PYGL) dimer b + 2 ATP => glycogen phosphorylase (PYGL) dimer a + 2 ADP
Reactome:R-HSA-9618785
Calmodulin binds neurogranin
Reactome:R-HSA-9619355
CaMKK autophosphorylates in the cytosol
Reactome:R-HSA-9619376
CAMK1 binds calmodulin
Reactome:R-HSA-9653585
S-Farn-Me KRAS4B binds calmodulin
Reactome:R-HSA-9654521
Calmodulin dissociates KRAS4B from the plasma membrane
Reactome:R-HSA-9654523
ARL2:GTP bind PDE6D on KRAS4B
Reactome:R-HSA-9654525
PDE6D binds S-Farn-Me KRAS4B:CALM:4 Ca2+
Reactome:R-HSA-9654533
KRAS4B recycles to the plasma membrane
Reactome:R-HSA-9865670
TRPV4 tetramer binds CALM1:Ca2+ (calmodulin:Ca2+)
Reactome:R-NUL-9617449
Rasgrf1 promotes activation of HRAS
Reactome:R-NUL-9618916
Camkk1 binds activated calmodulin in the nucleus
Reactome:R-NUL-9619177
Camkk2 phosphorylates CAMK4
Reactome:R-NUL-9619243
Camkk1 binds activated calmodulin in the cytosol
Reactome:R-NUL-9619396
CAMKK1 phosphorylates CAMK1
Reactome:R-NUL-9619413
CAMKK2 phosphorylates Camk1
file:human/CALM1/CALM1-deep-research-falcon.md
Deep research on CALM1 function

📚 Additional Documentation

Deep Research Falcon

(CALM1-deep-research-falcon.md)

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end_time: '2025-12-26T10:01:07.735238'
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template_file: templates/gene_research_go_focused.md
template_variables:
organism: human
gene_id: CALM1
gene_symbol: CALM1
uniprot_accession: P0DP23
protein_description: 'RecName: Full=Calmodulin-1 {ECO:0000312|HGNC:HGNC:1442};'
gene_info: Name=CALM1 {ECO:0000303|PubMed:7925473, ECO:0000312|HGNC:HGNC:1442};
Synonyms=CALM, CAM, CAM1;
organism_full: Homo sapiens (Human).
protein_family: Belongs to the calmodulin family. .
protein_domains: CALM/Myosin/TropC-like. (IPR050230); EF-hand-dom_pair. (IPR011992);
EF_Hand_1_Ca_BS. (IPR018247); EF_hand_dom. (IPR002048); EF-hand_7 (PF13499)
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citation_count: 15


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: P0DP23
  • Protein Description: RecName: Full=Calmodulin-1 {ECO:0000312|HGNC:HGNC:1442};
  • Gene Information: Name=CALM1 {ECO:0000303|PubMed:7925473, ECO:0000312|HGNC:HGNC:1442}; Synonyms=CALM, CAM, CAM1;
  • Organism (full): Homo sapiens (Human).
  • Protein Family: Belongs to the calmodulin family. .
  • Key Domains: CALM/Myosin/TropC-like. (IPR050230); EF-hand-dom_pair. (IPR011992); EF_Hand_1_Ca_BS. (IPR018247); EF_hand_dom. (IPR002048); EF-hand_7 (PF13499)

MANDATORY VERIFICATION STEPS:

  1. Check if the gene symbol "CALM1" 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 'CALM1' 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 CALM1 (gene ID: CALM1, UniProt: P0DP23) 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: P0DP23
  • Protein Description: RecName: Full=Calmodulin-1 {ECO:0000312|HGNC:HGNC:1442};
  • Gene Information: Name=CALM1 {ECO:0000303|PubMed:7925473, ECO:0000312|HGNC:HGNC:1442}; Synonyms=CALM, CAM, CAM1;
  • Organism (full): Homo sapiens (Human).
  • Protein Family: Belongs to the calmodulin family. .
  • Key Domains: CALM/Myosin/TropC-like. (IPR050230); EF-hand-dom_pair. (IPR011992); EF_Hand_1_Ca_BS. (IPR018247); EF_hand_dom. (IPR002048); EF-hand_7 (PF13499)

MANDATORY VERIFICATION STEPS:

  1. Check if the gene symbol "CALM1" 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 'CALM1' 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 CALM1 (gene ID: CALM1, UniProt: P0DP23) 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.

Gene/protein verification
- Identity and nomenclature: CALM1 (HGNC:1442) encodes human calmodulin-1, one of three human genes (CALM1, CALM2, CALM3) that produce an identical 149–amino acid calmodulin protein; the protein is a ubiquitous Ca2+ sensor/adaptor rather than an enzyme or transporter (Jan 2023) (hussey2023calmodulinmutationsin pages 1-2).
- Domains/family: Calmodulin belongs to the calmodulin family and contains four EF-hand Ca2+-binding motifs arranged as two globular lobes (N- and C-lobes) connected by a flexible linker, fully consistent with EF-hand domain annotations in UniProt P0DP23 (Jan 2023) (hussey2023calmodulinmutationsin pages 1-2).
- Organism: Homo sapiens is correct for CALM1 (Jan 2023) (hussey2023calmodulinmutationsin pages 1-2).

Key concepts and definitions
- Calmodulin (CaM) is a 17-kDa, highly conserved, ubiquitous Ca2+ sensor that transduces intracellular Ca2+ signals by binding target proteins directly or activating Ca2+/CaM-dependent enzymes (Jan 2023) (hussey2023calmodulinmutationsin pages 1-2).
- Lobe biophysics: The two EF-hand lobes differ in Ca2+ affinity and kinetics, enabling temporal and spatial decoding of Ca2+ signals. Approximate lobe KDs (context/target dependent) reported in an authoritative 2023 review: C-lobe ~2.4 μM, N-lobe ~16 μM (Jan 2023) (hussey2023calmodulinmutationsin pages 1-2).
- Mechanism of action: Ca2+ binding induces conformational changes in each lobe that expose hydrophobic surfaces to engage short linear motifs in targets (e.g., IQ motifs of voltage-gated channels); the N- and C-lobes can bind distinct segments to shape functional modulation, including Ca2+-dependent inactivation (CDI) of L-type Ca2+ channels (Jan 2023; May 2024) (hussey2023calmodulinmutationsin pages 1-2, jensen2024calmodulinvariantsin pages 22-25).

Subcellular localization and expression
- Localization: Calmodulin is predominantly cytosolic but dynamically localizes with its binding partners at the plasma membrane (e.g., CaV1.2), sarco/endoplasmic reticulum (e.g., RyR2), cytoskeleton and nucleus, reflecting its role as an adaptor in diverse signaling complexes (Jan 2023) (hussey2023calmodulinmutationsin pages 1-2).
- Expression: Calmodulin is ubiquitously expressed. Brain analyses show high expression across neuronal cell types, with CALM1/2 transcripts detected in a majority of hippocampal cells in single-cell datasets and RNAscope confirmation of strong neuronal expression (May 22, 2024) (jensen2024calmodulinvariantsin pages 10-12). All three genes contribute to total CaM, with developmentally increasing expression; the protein product is identical from CALM1–3 (Jan 2023) (hussey2023calmodulinmutationsin pages 1-2).

Biochemical functions and principal binding partners
- Voltage-gated Ca2+ channels: CaM constitutively associates with CaV1.2 (CACNA1C) via the IQ motif and mediates CDI; many pathogenic CALM variants (especially in the C-lobe) reduce Ca2+ affinity and impair CDI, producing gain-of-function CaV1.2 currents and arrhythmogenic phenotypes (Jan 2023; May 2024) (hussey2023calmodulinmutationsin pages 1-2, jensen2024calmodulinvariantsin pages 22-25).
- Ryanodine receptor 2 (RyR2): CaM binds RyR2 and modulates its open probability at low and high Ca2+. The arrhythmia-associated CALM E105A mutation significantly weakens CaM binding to two high-affinity RyR2 CaM-binding regions in vitro (isothermal titration calorimetry), implicating disrupted CaM–RyR2 coupling in disease (Oct 2023) (thanassoulas2023arrhythmiaassociatedcalmoduline105a pages 13-14).
- Voltage-gated Na+ channels: Calmodulin interacts with NaV channels and contributes to gating regulation; together with dysregulated CaV1.2 and RyR2, NaV modulation is implicated broadly in calmodulinopathy pathophysiology (Jan 2023) (hussey2023calmodulinmutationsin pages 1-2).
- Enzymatic signaling pathways: CaM directly activates Ca2+/calmodulin-dependent kinases (e.g., CaMKII/IV) and myosin light chain kinase (MLCK), and the phosphatase calcineurin (driving NFAT signaling), and regulates certain adenylyl cyclase isoforms (e.g., AC6) as part of Ca2+–cAMP crosstalk (Jan 2023) (hussey2023calmodulinmutationsin pages 1-2).

Pathways and cellular roles
- Calmodulin integrates Ca2+ signals to regulate excitation–contraction coupling (via CaV1.2–RyR2 axis), membrane excitability (via CaV/NaV), cytoskeletal dynamics and contraction (via MLCK), and gene expression programs (via CaMKII/IV and calcineurin–NFAT), positioning CALM1 as a central adaptor in cardiac, neuronal, and immune pathways (Jan 2023; Oct 2023; May 2024) (hussey2023calmodulinmutationsin pages 1-2, thanassoulas2023arrhythmiaassociatedcalmoduline105a pages 13-14, jensen2024calmodulinvariantsin pages 22-25).

Recent developments (2023–2024)
- International Calmodulinopathy Registry (ICalmR) update: The 2023 report assembled 140 CALM-positive patients (median age 10.8 years), with CALM-LQTS (53%) and CALM-CPVT (26%) predominant. Symptomatic patients experienced arrhythmic events in 74%. Compared with the 2019 cohort, the frequency of cardiac events fell from 85% to 61% (P = .001), and sudden death from 27% to 9% (P = .008). Neurological manifestations were present in a notable subset, and cardiomyopathy/congenital heart defects occurred in ~30% (Aug 2023; European Heart Journal) (https://doi.org/10.1093/eurheartj/ehad418) (crotti2023clinicalpresentationof pages 3-4, crotti2023clinicalpresentationof pages 2-3).
- Neuropsychiatric genetics: A 2024 large-scale sequencing study linked calmodulin C-lobe missense variants to schizophrenia risk. Among 24,248 cases and 97,322 controls, 7 carriers were found in cases and 20 in controls; all seven case variants localized to the C-lobe, with enrichment of C-lobe variation (Fisher P = 0.0009) and an adjusted OR ≈ 5.6 for C-lobe variants. Functional assays revealed two classes: loss-of-function variants reducing Ca2+ affinity and CaV1.2 interaction (LQTS-like), and gain-of-function variants with increased Ca2+ affinity but unchanged CaV1.2 gating, implying additional neuronal targets (May 22, 2024; medRxiv) (https://doi.org/10.1101/2024.05.22.24307674) (jensen2024calmodulinvariantsin pages 1-3, jensen2024calmodulinvariantsin pages 3-5, jensen2024calmodulinvariantsin pages 22-25, jensen2024calmodulinvariantsin pages 10-12).
- Structural/biophysical insights for RyR2: The CALM E105A mutation significantly reduces binding of CaM to proposed RyR2 CaM-binding regions in both apo and Ca2+-bound states, supporting a model in which EF-hand perturbations alter target selectivity and RyR2 regulation (Oct 2023; IJMS) (https://doi.org/10.3390/ijms242115630) (thanassoulas2023arrhythmiaassociatedcalmoduline105a pages 13-14).

Current applications and real-world implementation
- Clinical genetics and risk stratification: CALM1–3 variant testing is part of channelopathy evaluation in LQTS/CPVT. Registry data emphasize early onset, high arrhythmic event rates, and pleiotropy (neurologic, structural) necessitating multidisciplinary management and family screening (Aug 2023) (https://doi.org/10.1093/eurheartj/ehad418) (crotti2023clinicalpresentationof pages 3-4, crotti2023clinicalpresentationof pages 2-3).
- Management: Evidence remains insufficient for definitive guidelines; current practice employs pharmacologic and surgical antiadrenergic interventions, sodium channel blockers, and frequent use of implantable cardioverter–defibrillators for secondary prevention (Aug 2023) (https://doi.org/10.1093/eurheartj/ehad418) (crotti2023clinicalpresentationof pages 2-3).
- Research tools/models: Variant mechanistic studies leverage recombinant CaM biophysics, target peptide/channel binding, and electrophysiology to map target-specific dysfunction (CaV1.2 CDI defects; RyR2 dysregulation), informing variant interpretation and potential precision strategies (Jan 2023; Oct 2023; May 2024) (hussey2023calmodulinmutationsin pages 1-2, thanassoulas2023arrhythmiaassociatedcalmoduline105a pages 13-14, jensen2024calmodulinvariantsin pages 22-25).

Expert opinions and analysis
- Authoritative reviews underscore calmodulin’s centrality in Ca2+ signaling and the distinctive lobe-specific biophysics that underlie disease mechanisms; pathogenicity often tracks with C-lobe variants that impair Ca2+ binding and target regulation, especially of CaV1.2 and RyR2 in cardiomyocytes (Jan 2023) (hussey2023calmodulinmutationsin pages 1-2).
- The 2023 registry analysis highlights the expanding phenotypic spectrum and suggests that earlier reports overrepresented the most severe cases; increased recognition of milder and familial forms is emerging, but therapeutic evidence is still limited (Aug 2023) (crotti2023clinicalpresentationof pages 3-4, crotti2023clinicalpresentationof pages 2-3).
- The 2024 schizophrenia work expands calmodulinopathy beyond cardiac disease, emphasizes C-lobe variant burden in CALM1/2, and proposes distinct mechanistic classes (loss- vs gain-of-function in Ca2+ binding), pointing to broader neuronal targets and the need for brain-specific functional studies (May 22, 2024) (jensen2024calmodulinvariantsin pages 1-3, jensen2024calmodulinvariantsin pages 3-5, jensen2024calmodulinvariantsin pages 22-25, jensen2024calmodulinvariantsin pages 10-12).

Relevant statistics and quantitative data
- Lobe-specific Ca2+ affinity: C-lobe KD ≈ 2.4 μM; N-lobe KD ≈ 16 μM (context dependent) (Jan 2023) (https://doi.org/10.1080/19336950.2023.2165278) (hussey2023calmodulinmutationsin pages 1-2).
- Registry counts and outcomes: N = 140; symptomatic 74%; events reduced 85%→61% vs 2019; sudden death 27%→9% (Aug 2023) (https://doi.org/10.1093/eurheartj/ehad418) (crotti2023clinicalpresentationof pages 3-4, crotti2023clinicalpresentationof pages 2-3).
- Schizophrenia association: 7/24,248 cases vs 20/97,322 controls; C-lobe enrichment (Fisher P = 0.0009); adjusted OR ≈ 5.6 (Padj ≈ 0.043) (May 22, 2024) (https://doi.org/10.1101/2024.05.22.24307674) (jensen2024calmodulinvariantsin pages 10-12, jensen2024calmodulinvariantsin pages 1-3).
- RyR2 binding perturbation: E105A CaM shows significantly reduced binding to two RyR2 CaM-binding peptides by ITC in apo and Ca2+-bound conditions (qualitative reported reduction) (Oct 2023) (https://doi.org/10.3390/ijms242115630) (thanassoulas2023arrhythmiaassociatedcalmoduline105a pages 13-14).

Limitations and open questions
- Despite progress in genotype–mechanism mapping for LQTS/CPVT, therapeutic recommendations for CALM1–3 carriers are data-limited and individualized. The emergence of neuropsychiatric associations requires replication and mechanistic dissection of brain-specific targets beyond CaV1.2 (Aug 2023; May 2024) (crotti2023clinicalpresentationof pages 2-3, jensen2024calmodulinvariantsin pages 1-3).

Included artifact of recent quantitative facts:
| Topic | Key quantitative/statistical finding | Source (journal; date) | URL |
|---|---|---:|---|
| International Calmodulinopathy Registry (ICalmR) | N = 140 CALM-positive subjects (97 index, 43 family); CALM-LQTS 74 (53%), CALM-CPVT 36 (26%); 103/140 symptomatic (74%). Compared with 2019 cohort: cardiac events reduced 61% vs 85% (P = 0.001); sudden death 9% vs 27% (P = 0.008). | European Heart Journal; Aug 2023 (crotti2023clinicalpresentationof pages 3-4) | https://doi.org/10.1093/eurheartj/ehad418 |
| Schizophrenia association of CALM variants | Observed carriers: 7 in cases (n = 24,248) vs 20 in controls (n = 97,322); C‑lobe missense variants associated with increased SCZ risk — OR ≈ 5.6 (Padj ≈ 0.043); C‑lobe enrichment significant (Fisher P = 0.0009). | medRxiv preprint; May 22, 2024 (jensen2024calmodulinvariantsin pages 1-3, jensen2024calmodulinvariantsin pages 10-12) | https://doi.org/10.1101/2024.05.22.24307674 |
| Ca2+ affinity — lobes (biophysical) | Reported approximate KD values (lobes, target/context dependent): C‑lobe ≈ 2.4 µM; N‑lobe ≈ 16 µM (note: target binding and protein context modify these values). | Channels; Jan 2023 (review) (hussey2023calmodulinmutationsin pages 1-2) | https://doi.org/10.1080/19336950.2023.2165278 |
| CaV1.2 (CACNA1C) functional impact of arrhythmogenic CALM variants | Many pathogenic C‑lobe CALM variants reduce Ca2+ affinity and impair Ca2+-dependent inactivation (CDI) of L‑type Ca2+ channels, producing AP/Ca2+ handling abnormalities linked to LQTS phenotypes (variant-specific magnitudes reported in functional studies). | Channels review & medRxiv analyses (Jan 2023; May 2024) (hussey2023calmodulinmutationsin pages 1-2, jensen2024calmodulinvariantsin pages 22-25) | https://doi.org/10.1080/19336950.2023.2165278 |
| RyR2 CaM-binding perturbation (example variant E105A) | E105A calmodulin mutation significantly reduces CaM binding affinity to two proposed RyR2 CaM‑binding regions (measured by ITC) in presence and absence of Ca2+ (qualitative: marked negative effect on interaction). | International Journal of Molecular Sciences; Oct 2023 (thanassoulas2023arrhythmiaassociatedcalmoduline105a pages 13-14) | https://doi.org/10.3390/ijms242115630 |

Table: A compact table of 2023–2024 quantitative findings for human CALM1 (calmodulin‑1), summarizing registry numbers, genetic association statistics, lobe KD estimates, and measured effects on CaV1.2/RyR2 with primary-source links for follow-up.

References (URLs and dates)
- Hussey JW, Limpitikul WB, Dick IE. Calmodulin mutations in human disease. Channels. Jan 2023. https://doi.org/10.1080/19336950.2023.2165278 (hussey2023calmodulinmutationsin pages 1-2).
- Crotti L, et al. Clinical presentation of calmodulin mutations: the International Calmodulinopathy Registry. European Heart Journal. Aug 2023. https://doi.org/10.1093/eurheartj/ehad418 (crotti2023clinicalpresentationof pages 3-4, crotti2023clinicalpresentationof pages 2-3).
- Thanassoulas A, et al. Arrhythmia-Associated Calmodulin E105A Mutation Alters the Binding Affinity of CaM to a Ryanodine Receptor 2 CaM-Binding Pocket. Int J Mol Sci. Oct 2023. https://doi.org/10.3390/ijms242115630 (thanassoulas2023arrhythmiaassociatedcalmoduline105a pages 13-14).
- Jensen HH, et al. Calmodulin variants in schizophrenia patients display gain-of-function or loss-of-function effects. medRxiv. May 22, 2024. https://doi.org/10.1101/2024.05.22.24307674 (jensen2024calmodulinvariantsin pages 1-3, jensen2024calmodulinvariantsin pages 3-5, jensen2024calmodulinvariantsin pages 22-25, jensen2024calmodulinvariantsin pages 10-12).

References

  1. (hussey2023calmodulinmutationsin pages 1-2): John W. Hussey, Worawan B. Limpitikul, and Ivy E. Dick. Calmodulin mutations in human disease. Channels, Jan 2023. URL: https://doi.org/10.1080/19336950.2023.2165278, doi:10.1080/19336950.2023.2165278. This article has 45 citations and is from a peer-reviewed journal.

  2. (jensen2024calmodulinvariantsin pages 22-25): PhD Helene Halkjær Jensen, PhD Malene Brohus, BSc John W. Hussey III, Ana-Octavia Busuioc MSc, MSc Emil Drivsholm Iversen, MSc Faezeh Darki, MSc Gabriela Dobromirova Nikolova, MSc Amalie El-ton Baisgaard, PhD Palle Duun Rohde, Ida Elisabeth, M. D. Gad Holm, PhD Andrew McQuillin, PhD Tor-ben Moos, PhD Ivy E. Dick, PhD Michael Toft Overgaard, and M. Nyegaard. Calmodulin variants in schizophrenia patients display gain-of-function or loss-of-function effects. MedRxiv, May 2024. URL: https://doi.org/10.1101/2024.05.22.24307674, doi:10.1101/2024.05.22.24307674. This article has 2 citations.

  3. (jensen2024calmodulinvariantsin pages 10-12): PhD Helene Halkjær Jensen, PhD Malene Brohus, BSc John W. Hussey III, Ana-Octavia Busuioc MSc, MSc Emil Drivsholm Iversen, MSc Faezeh Darki, MSc Gabriela Dobromirova Nikolova, MSc Amalie El-ton Baisgaard, PhD Palle Duun Rohde, Ida Elisabeth, M. D. Gad Holm, PhD Andrew McQuillin, PhD Tor-ben Moos, PhD Ivy E. Dick, PhD Michael Toft Overgaard, and M. Nyegaard. Calmodulin variants in schizophrenia patients display gain-of-function or loss-of-function effects. MedRxiv, May 2024. URL: https://doi.org/10.1101/2024.05.22.24307674, doi:10.1101/2024.05.22.24307674. This article has 2 citations.

  4. (thanassoulas2023arrhythmiaassociatedcalmoduline105a pages 13-14): Angelos Thanassoulas, Maria Theodoridou, Laila Barrak, Emna Riguene, Tamader Alyaarabi, Mohamed A. Elrayess, F. Anthony Lai, and Michail Nomikos. Arrhythmia-associated calmodulin e105a mutation alters the binding affinity of cam to a ryanodine receptor 2 cam-binding pocket. International Journal of Molecular Sciences, 24:15630, Oct 2023. URL: https://doi.org/10.3390/ijms242115630, doi:10.3390/ijms242115630. This article has 2 citations and is from a poor quality or predatory journal.

  5. (crotti2023clinicalpresentationof pages 3-4): Lia Crotti, Carla Spazzolini, Mette Nyegaard, Michael T Overgaard, Maria-Christina Kotta, Federica Dagradi, Luca Sala, Takeshi Aiba, Mark D Ayers, Anwar Baban, Julien Barc, Cheyenne M Beach, Elijah R Behr, J Martijn Bos, Marina Cerrone, Peter Covi, Bettina Cuneo, Isabelle Denjoy, Birgit Donner, Adrienne Elbert, Håkan Eliasson, Susan P Etheridge, Megumi Fukuyama, Francesca Girolami, Robert Hamilton, Minoru Horie, Maria Iascone, Juan Jiménez Jaimez, Henrik Kjærulf Jensen, Prince J Kannankeril, Juan P Kaski, Naomasa Makita, Carmen Muñoz-Esparza, Hans H Odland, Seiko Ohno, John Papagiannis, Alessandra Pia Porretta, Christopher Prandstetter, Vincent Probst, Tomas Robyns, Eric Rosenthal, Ferran Rosés-Noguer, Nicole Sekarski, Anoop Singh, Georgia Spentzou, Fridrike Stute, Jacob Tfelt-Hansen, Jan Till, Kathryn E Tobert, Jeffrey M Vinocur, Gregory Webster, Arthur A M Wilde, Cordula M Wolf, Michael J Ackerman, and Peter J Schwartz. Clinical presentation of calmodulin mutations: the international calmodulinopathy registry. European Heart Journal, 44:3357-3370, Aug 2023. URL: https://doi.org/10.1093/eurheartj/ehad418, doi:10.1093/eurheartj/ehad418. This article has 58 citations and is from a highest quality peer-reviewed journal.

  6. (crotti2023clinicalpresentationof pages 2-3): Lia Crotti, Carla Spazzolini, Mette Nyegaard, Michael T Overgaard, Maria-Christina Kotta, Federica Dagradi, Luca Sala, Takeshi Aiba, Mark D Ayers, Anwar Baban, Julien Barc, Cheyenne M Beach, Elijah R Behr, J Martijn Bos, Marina Cerrone, Peter Covi, Bettina Cuneo, Isabelle Denjoy, Birgit Donner, Adrienne Elbert, Håkan Eliasson, Susan P Etheridge, Megumi Fukuyama, Francesca Girolami, Robert Hamilton, Minoru Horie, Maria Iascone, Juan Jiménez Jaimez, Henrik Kjærulf Jensen, Prince J Kannankeril, Juan P Kaski, Naomasa Makita, Carmen Muñoz-Esparza, Hans H Odland, Seiko Ohno, John Papagiannis, Alessandra Pia Porretta, Christopher Prandstetter, Vincent Probst, Tomas Robyns, Eric Rosenthal, Ferran Rosés-Noguer, Nicole Sekarski, Anoop Singh, Georgia Spentzou, Fridrike Stute, Jacob Tfelt-Hansen, Jan Till, Kathryn E Tobert, Jeffrey M Vinocur, Gregory Webster, Arthur A M Wilde, Cordula M Wolf, Michael J Ackerman, and Peter J Schwartz. Clinical presentation of calmodulin mutations: the international calmodulinopathy registry. European Heart Journal, 44:3357-3370, Aug 2023. URL: https://doi.org/10.1093/eurheartj/ehad418, doi:10.1093/eurheartj/ehad418. This article has 58 citations and is from a highest quality peer-reviewed journal.

  7. (jensen2024calmodulinvariantsin pages 1-3): PhD Helene Halkjær Jensen, PhD Malene Brohus, BSc John W. Hussey III, Ana-Octavia Busuioc MSc, MSc Emil Drivsholm Iversen, MSc Faezeh Darki, MSc Gabriela Dobromirova Nikolova, MSc Amalie El-ton Baisgaard, PhD Palle Duun Rohde, Ida Elisabeth, M. D. Gad Holm, PhD Andrew McQuillin, PhD Tor-ben Moos, PhD Ivy E. Dick, PhD Michael Toft Overgaard, and M. Nyegaard. Calmodulin variants in schizophrenia patients display gain-of-function or loss-of-function effects. MedRxiv, May 2024. URL: https://doi.org/10.1101/2024.05.22.24307674, doi:10.1101/2024.05.22.24307674. This article has 2 citations.

  8. (jensen2024calmodulinvariantsin pages 3-5): PhD Helene Halkjær Jensen, PhD Malene Brohus, BSc John W. Hussey III, Ana-Octavia Busuioc MSc, MSc Emil Drivsholm Iversen, MSc Faezeh Darki, MSc Gabriela Dobromirova Nikolova, MSc Amalie El-ton Baisgaard, PhD Palle Duun Rohde, Ida Elisabeth, M. D. Gad Holm, PhD Andrew McQuillin, PhD Tor-ben Moos, PhD Ivy E. Dick, PhD Michael Toft Overgaard, and M. Nyegaard. Calmodulin variants in schizophrenia patients display gain-of-function or loss-of-function effects. MedRxiv, May 2024. URL: https://doi.org/10.1101/2024.05.22.24307674, doi:10.1101/2024.05.22.24307674. This article has 2 citations.

Citations

  1. hussey2023calmodulinmutationsin pages 1-2
  2. jensen2024calmodulinvariantsin pages 10-12
  3. crotti2023clinicalpresentationof pages 2-3
  4. crotti2023clinicalpresentationof pages 3-4
  5. jensen2024calmodulinvariantsin pages 22-25
  6. jensen2024calmodulinvariantsin pages 1-3
  7. jensen2024calmodulinvariantsin pages 3-5
  8. https://doi.org/10.1093/eurheartj/ehad418
  9. https://doi.org/10.1101/2024.05.22.24307674
  10. https://doi.org/10.3390/ijms242115630
  11. https://doi.org/10.1080/19336950.2023.2165278
  12. https://doi.org/10.1080/19336950.2023.2165278,
  13. https://doi.org/10.1101/2024.05.22.24307674,
  14. https://doi.org/10.3390/ijms242115630,
  15. https://doi.org/10.1093/eurheartj/ehad418,

Falcon Research

(CALM1-falcon-research.md)

Falcon Research Report: CALM1 (human)

Generated using FutureHouse Falcon API

UniProt ID: P0DP23
Directory alias: CALM1


Question: You are a molecular biologist and gene annotation expert conducting comprehensive research to support GO annotation curation.

Provide detailed, well-cited information focusing on:
1. Gene function and molecular mechanisms
2. Cellular localization and subcellular components
3. Biological processes involvement
4. Disease associations and phenotypes
5. Protein domains and structural features
6. Expression patterns and regulation
7. Evolutionary conservation
8. Key experimental evidence and literature

Format as a comprehensive research report with citations suitable for Gene Ontology annotation curation.

Research the Homo sapiens gene CALM1.

=== UNIPROT METADATA ===
UniProt ID: Q96HK3
Entry Name: CALM1_HUMAN
Gene Name: CALM1
Gene Synonyms: CALM, CAM, CAM1
Protein Name: Calmodulin-1
Organism: Homo sapiens (Human)
NCBI Taxonomy ID: 9606
Function: (Microbial infection) Required for C.violaceum CopC and S.flexneri OspC3 arginine ADP-riboxanase activity.
Subcellular Location: Cytoplasm, cytoskeleton, spindle
Subunit: (Microbial infection) Interacts with S.flexneri OspC1 and OspC3 (PubMed:35568036, PubMed:36624349). S.flexneri OspC1 and OspC3 interact specifically with the apo form of calmodulin and prevents calcium-binding (PubMed:35568036).
======================

Provide a comprehensive report covering function, localization, processes, domains, disease associations, expression, conservation, and relevant GO terms.

IMPORTANT: Focus specifically on the gene identified by the metadata above, particularly the UniProt ID, locus tag, and protein description if provided.

Sometimes different genes in the same organism have the same name. In this case, the gene being reviewed is the one identified by the metadata above.

This report provides a comprehensive analysis of the Homo sapiens CALM1 gene (UniProt ID Q96HK3), encoding calmodulin‐1, with particular emphasis on its molecular function, cellular localization, involvement in biological processes, disease associations, protein domains, expression patterns, evolutionary conservation, and the key experimental evidence that supports these annotations. In addition to its well‐established role as a ubiquitous calcium‐binding messenger protein, the CALM1 gene product has now been implicated in microbial infection processes, where it is required for the activity of specific bacterial effector proteins. This multifaceted profile makes CALM1 essential for Gene Ontology (GO) annotation curation, and the following sections synthesize data from multiple high‐quality studies (OpenTargets Search: -CALM1, crotti2023clinicalpresentationof pages 3-4, kotta2018calmodulinopathyanovel pages 4-5).

  1. Gene Function and Molecular Mechanisms
    CALM1 encodes calmodulin‐1, a prototypical calcium‐binding messenger protein that plays a central role in intracellular calcium signaling. By virtue of its ability to bind Ca²⁺ ions through highly conserved EF‐hand motifs, calmodulin undergoes a conformational change that enables it to interact with and regulate a wide spectrum of target proteins such as kinases, phosphatases, ion channels, and other enzymes involved in signal transduction (OpenTargets Search: -CALM1, crotti2023clinicalpresentationof pages 3-4). In its apo state, calmodulin is pre‐bound to many target proteins, and calcium binding further modifies these interactions by inducing structural rearrangements that modulate target activity (kotta2018calmodulinopathyanovel pages 4-5, kotta2018calmodulinopathyanovel pages 5-7). Notably, the current UniProt metadata also highlights a role for CALM1 in microbial infection: it is required for the arginine ADP‐riboxanase activity of CopC from Chromobacterium violaceum and OspC3 from Shigella flexneri, and the bacterial proteins OspC1 and OspC3 bind specifically to the apo form of calmodulin, thereby preventing its typical calcium‐binding capacity (OpenTargets Search: -CALM1, crotti2023clinicalpresentationof pages 3-4). This functional involvement in microbial infection expands the traditional view of calmodulin solely as a regulator of endogenous calcium signaling by positioning it as a critical host factor hijacked by pathogenic bacteria during infection to modulate host cell processes. At the molecular level, these interactions highlight an additional layer of regulation wherein exogenous effectors can commandeer calmodulin’s activity and thereby alter downstream signaling cascades that are normally tightly controlled by Ca²⁺ flux (kotta2018calmodulinopathyanovel pages 1-2, kotta2018calmodulinopathyanovel pages 2-4).

  2. Cellular Localization and Subcellular Components
    The spatial distribution of calmodulin-1 is crucial to its functional versatility. CALM1 is primarily localized to the cytoplasm, where it is soluble yet can associate dynamically with various subcellular structures such as the cytoskeleton and spindle apparatus (kotta2018calmodulinopathyanovel pages 2-4, Clinical Trial Search: 1fc52ed050b1). Numerous studies have shown that although calmodulin is ubiquitously distributed throughout the cytosol, it also transiently associates with membranes and specific organelles when engaged in targeted signaling events (kotta2018calmodulinopathyanovel pages 4-5, tsai2021calmodulinopathyininherited pages 1-2). For example, during microbial infections, the interaction of the bacterial effector proteins with the apo form of calmodulin occurs at specific intracellular locales that are critical for modulating the host response (OpenTargets Search: -CALM1). Furthermore, calmodulin’s localization to the spindle during cell division indicates its role in ensuring proper microtubule dynamics and cytoskeletal organization during mitosis (kotta2018calmodulinopathyanovel pages 2-4). These observations underscore that CALM1 is not statically confined, but rather is dynamically distributed between the cytoplasm, membrane-associated complexes, and the cytoskeleton, which is essential for its multifarious roles in signal transduction and regulation of cellular architecture (Clinical Trial Search: 1fc52ed050b1, kotta2018calmodulinopathyanovel pages 4-5).

  3. Biological Processes Involvement
    CALM1 is involved in a wide array of biological processes that are central to cellular physiology. The protein’s primary function is to mediate calcium-dependent signal transduction, which underpins processes such as muscle contraction, neurotransmitter release, cell cycle progression, and gene expression regulation (OpenTargets Search: -CALM1, crotti2023clinicalpresentationof pages 3-4). Through its ability to bind and sense calcium ions, calmodulin modulates the activity of enzyme complexes including Ca²⁺/calmodulin-dependent protein kinases (CaMKs) and calcineurin, thereby impacting processes such as neuronal plasticity, cardiomyocyte contraction, and even aspects of cell differentiation (jensen2024calmodulinvariantsin pages 22-25, kotta2018calmodulinopathyanovel pages 4-5). Additionally, CALM1 participates in regulating intracellular calcium homeostasis, acting as a buffer and transducer that ensures precise temporal and spatial control of calcium signals (jensen2024calmodulinvariantsin pages 1-3, kotta2018calmodulinopathyanovel pages 5-7). In the context of microbial infection, CALM1 plays a unique role by serving as a cofactor for bacterial proteins such as CopC and OspC3, which exploit its calcium-binding properties to manipulate host cellular pathways, thus linking CALM1 function to host-pathogen interactions and innate immune responses (OpenTargets Search: -CALM1, eno202114q32.11microdeletionincluding pages 14-23). Collectively, these roles highlight CALM1’s participation in essential cellular pathways that regulate not only basal cellular functions but also responses to external stress, infection, and developmental cues (crotti2023clinicalpresentationof pages 3-4, crotti2023clinicalpresentationof pages 8-9).

  4. Disease Associations and Phenotypes
    Mutations and dysregulation of CALM1 have been associated with a spectrum of human diseases, most notably calmodulinopathies that manifest as life‐threatening cardiac arrhythmias, including long QT syndrome (LQTS) and catecholaminergic polymorphic ventricular tachycardia (CPVT) (crotti2023clinicalpresentationof pages 9-10, OpenTargets Search: -CALM1). These disorders often present in infancy or early childhood and are characterized by abnormal cardiac electrical activity, which can lead to sudden cardiac death (crotti2023clinicalpresentationof pages 3-4, crotti2023clinicalpresentationof pages 2-3). Beyond the classical arrhythmic phenotypes, CALM1 mutations have also been implicated in neurological disorders and developmental anomalies, reflecting the protein’s ubiquitous expression and diverse regulatory roles in both the nervous system and cardiac tissue (crotti2023clinicalpresentationof pages 4-5, jensen2024calmodulinvariantsin pages 25-27). In addition to these endogenous disease processes, the unique role of CALM1 in microbial infection pathogenesis has also potential clinical ramifications. For instance, the interaction between S. flexneri OspC proteins and calmodulin can influence the outcome of bacterial infections and may become a target for therapeutic intervention in cases where pathogens subvert host cell signaling (OpenTargets Search: -CALM1, kotta2018calmodulinopathyanovel pages 1-2). The clinical heterogeneity observed in calmodulinopathies, which may include cardiac conduction abnormalities, arrhythmic syncope, and even structural heart defects, underscores the importance of precise genotype-phenotype correlation studies to inform both diagnostic and treatment strategies (crotti2023clinicalpresentationof pages 9-10, crotti2023clinicalpresentationof pages 12-13).

  5. Protein Domains and Structural Features
    At the structural level, CALM1 encodes a small protein of 149 amino acids that is organized into two homologous globular domains (the N-terminal and the C-terminal lobes), each containing a pair of EF-hand motifs that form the calcium-binding sites (kotta2018calmodulinopathyanovel pages 4-5, kotta2018calmodulinopathyanovel pages 5-7). Each EF-hand motif consists of a helix-loop-helix structure whereby the loop region coordinates Ca²⁺ ions in a pentagonal bipyramidal geometry; this precise metal ion coordination is essential for triggering the conformational changes that allow calmodulin to interact with its downstream targets (tsai2021calmodulinopathyininherited pages 1-2, kotta2018calmodulinopathyanovel pages 4-5). Structural studies including high-resolution X-ray crystallography and NMR spectroscopy have revealed that the Ca²⁺-bound and Ca²⁺-free (apo) forms of calmodulin exhibit markedly different conformations, a feature that is key to its function as a regulatory switch (jensen2024calmodulinvariantsin pages 1-3, kotta2018calmodulinopathyanovel pages 5-7). In the context of microbial infection, the interaction of bacterial effectors with the apo form of calmodulin is particularly significant because these proteins, such as S. flexneri OspC1 and OspC3, selectively bind calmodulin in its calcium-free state and thereby modulate its ability to bind calcium when needed (OpenTargets Search: -CALM1, jensen2024calmodulinvariantsin pages 3-5). Moreover, the strict conservation of the EF-hand domains across species underscores their critical functional importance, and mutational analyses have demonstrated that even single amino acid substitutions in these domains can disrupt calcium affinity and lead to disease (crotti2023clinicalpresentationof pages 9-10, kotta2018calmodulinopathyanovel pages 1-2).

  6. Expression Patterns and Regulation
    CALM1 is ubiquitously expressed in human tissues, a reflection of its indispensable role in fundamental cellular processes (OpenTargets Search: -CALM1, crotti2023clinicalpresentationof pages 3-4). Expression analyses indicate particularly high levels in excitable tissues such as the heart and brain, where calcium signaling is critical for proper electrophysiological and synaptic function (crotti2023clinicalpresentationof pages 4-5, jensen2024calmodulinvariantsin pages 22-25). Transcriptional regulation of CALM1 is complex, involving multiple promoter elements and regulatory factors that ensure tight spatial and temporal control of its expression. In addition, post-translational modifications and controlled protein turnover further fine-tune the activity of calmodulin, ensuring that it is available in appropriate amounts in response to fluctuating intracellular Ca²⁺ concentrations (crotti2023clinicalpresentationof pages 3-4, kotta2018calmodulinopathyanovel pages 4-5). Recent studies leveraging high-throughput RNA sequencing and single-cell spatial transcriptomics have provided additional detail regarding the distribution of CALM1 mRNA across diverse cell types, corroborating its widespread expression and underscoring its regulatory importance in both normal physiology and disease states (jensen2024calmodulinvariantsin pages 10-12, jensen2024calmodulinvariantsin pages 12-16). Furthermore, differential regulation of CALM1, compared with its paralogues CALM2 and CALM3, in various tissues emphasizes that despite encoding identical proteins, these genes may be subject to distinct regulatory networks that contribute to tissue-specific functions or compensatory mechanisms in disease (kotta2018calmodulinopathyanovel pages 2-4, crotti2023clinicalpresentationof pages 8-9).

  7. Evolutionary Conservation
    One of the most striking features of CALM1 is its extraordinary evolutionary conservation. Calmodulin proteins are among the most highly conserved proteins known, with identical amino acid sequences encoded by the three separate genes CALM1, CALM2, and CALM3 in Homo sapiens (jensen2024calmodulinvariantsin pages 1-3, jensen2024calmodulinvariantsin pages 25-27). This conservation extends across vertebrates and even into lower eukaryotes, underscoring the fundamental importance of calcium signaling in cellular physiology (crotti2023clinicalpresentationof pages 3-4, kotta2018calmodulinopathyanovel pages 1-2). The conservation of the EF-hand motifs, in particular, highlights the critical nature of precise calcium binding for the proper function of calmodulin. Evolutionary studies have shown that mutations in these highly conserved residues are often deleterious and are linked to severe clinical phenotypes such as calmodulinopathy (crotti2023clinicalpresentationof pages 9-10, nguyen2022longqtsyndrome pages 9-10). The maintenance of protein structure and function over evolutionary timescales not only reflects the protein’s essential cellular roles but also provides a robust framework for using comparative genomics to further elucidate its function in human disease (jensen2024calmodulinvariantsin pages 1-3, jensen2024calmodulinvariantsin pages 25-27).

  8. Key Experimental Evidence and Literature
    A wealth of experimental evidence supports the multifaceted role of CALM1 in cellular signaling, disease, and microbial infection. Biochemical assays, including calcium-binding studies using spectroscopic methods, have delineated the precise affinities of each EF-hand domain for Ca²⁺ ions, revealing differential kinetics and capacities between the N- and C-lobes (kotta2018calmodulinopathyanovel pages 4-5, kotta2018calmodulinopathyanovel pages 5-7). Structural studies employing X-ray crystallography and NMR spectroscopy have provided detailed images of calmodulin in both its calcium-bound and apo conformations, elucidating the conformational shifts that underpin its role as a regulatory switch (jensen2024calmodulinvariantsin pages 1-3, tsai2021calmodulinopathyininherited pages 1-2). Functional analyses using site-directed mutagenesis in heterologous expression systems such as HEK293 cells and induced pluripotent stem cell-derived cardiomyocytes have illuminated how specific mutations in CALM1 perturb calcium binding and downstream signaling, leading to arrhythmogenic phenotypes characteristic of calmodulinopathies (crotti2023clinicalpresentationof pages 9-10, crotti2023clinicalpresentationof pages 12-13). In the field of microbial infection, interaction assays have demonstrated that bacterial effector proteins, such as S. flexneri OspC1 and OspC3, bind preferentially to the apo form of calmodulin to inhibit its calcium-binding ability, thereby modulating host cell responses during infection (OpenTargets Search: -CALM1, jensen2024calmodulinvariantsin pages 3-5). Moreover, transcriptomic and proteomic analyses have contributed additional layers of evidence by mapping the broad tissue expression patterns of CALM1 and linking dysregulation of its expression to disease states including cardiac arrhythmias and neurological disorders (jensen2024calmodulinvariantsin pages 10-12, crotti2023clinicalpresentationof pages 4-4). Collectively, these diverse experimental approaches—spanning structural biology, cell biology, electrophysiology, and clinical genetics—provide an integrated view of the essential functions of CALM1 and support its comprehensive annotation within the GO framework (kotta2018calmodulinopathyanovel pages 4-5, OpenTargets Search: -CALM1, crotti2023clinicalpresentationof pages 9-10).

In summary, the Homo sapiens CALM1 gene encodes calmodulin-1, a highly conserved, versatile calcium-binding protein that operates as a key intracellular sensor and signal transducer. By binding calcium through its EF-hand domains, CALM1 modulates a wide range of biological processes including ion channel regulation, muscle contraction, synaptic plasticity, cell cycle progression, and the host response to microbial infection. Its subcellular localization—predominantly in the cytoplasm with dynamic associations to the cytoskeleton and membrane compartments—enables it to function in varied cellular contexts. Mutations in CALM1 can lead to severe clinical phenotypes such as long QT syndrome, catecholaminergic polymorphic ventricular tachycardia, and other calmodulinopathies, reflecting its critical role in maintaining proper calcium homeostasis. Structurally, the protein is characterized by its two lobes, each comprising two EF-hand motifs, whose precision in calcium coordination is essential for downstream target regulation. Expression studies have consistently shown that CALM1 is ubiquitously expressed across tissues, with particularly high levels in excitable tissues like the heart and brain, while its regulatory mechanisms ensure that cellular calcium dynamics are tightly controlled. Evolutionary conservation of CALM1 across species underscores the fundamental role of calcium signaling in cellular physiology and provides a powerful context for functional studies. The integration of biochemical, structural, cellular, and clinical evidence provides a robust foundation for the GO annotation of CALM1, encompassing its molecular function (calcium ion binding and signal transduction), cellular component (cytoplasm, cytoskeleton, and spindle), biological process (regulation of ion channels, muscle contraction, neuronal signaling, and microbial infection response), and its role in human disease (arrhythmias and microbial pathogenesis) (OpenTargets Search: -CALM1, crotti2023clinicalpresentationof pages 3-4, kotta2018calmodulinopathyanovel pages 4-5, crotti2023clinicalpresentationof pages 9-10).

This comprehensive body of evidence is critical not only for understanding the normal cellular roles of CALM1 but also for elucidating the molecular mechanisms by which its dysfunction leads to disease. The added dimension of CALM1’s involvement in microbial infection, through its interaction with bacterial effectors such as OspC1 and OspC3, highlights its significance as an interface between host cell signaling and pathogen virulence strategies. Future research focused on the nuances of calmodulin-mediated signaling—especially in the context of dynamic subcellular localization, post-translational modifications, and tissue-specific regulation—will further refine our understanding of CALM1’s role in health and disease. Such studies will undoubtedly enhance the precision of GO annotations and facilitate the development of targeted therapeutic strategies for calmodulin-linked conditions (kotta2018calmodulinopathyanovel pages 1-2, crotti2023clinicalpresentationof pages 4-4, OpenTargets Search: -CALM1, crotti2023clinicalpresentationof pages 12-13).

In conclusion, the diverse roles and robust conservation of calmodulin-1 underscore its importance as a master regulator of calcium signaling in human cells. Its involvement in critical cellular processes, as well as in disease states ranging from cardiac arrhythmias to microbial infections, positions CALM1 as a pivotal gene for detailed Gene Ontology curation. The integration of data from structural, functional, and clinical studies provides a comprehensive framework that supports updated and accurate annotations for CALM1, ensuring that its multifaceted roles are fully captured in genomic databases (OpenTargets Search: -CALM1, kotta2018calmodulinopathyanovel pages 4-5, Clinical Trial Search: 1fc52ed050b1, crotti2023clinicalpresentationof pages 9-10, kotta2018calmodulinopathyanovel pages 1-2).

References

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  7. (Clinical Trial Search: 1fc52ed050b1): Clinical Trials Search via ClinicalTrials.gov: CALM1 OR calmodulin-1

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  12. (crotti2023clinicalpresentationof pages 8-9): Lia Crotti, Carla Spazzolini, Mette Nyegaard, Michael T Overgaard, Maria-Christina Kotta, Federica Dagradi, Luca Sala, Takeshi Aiba, Mark D Ayers, Anwar Baban, Julien Barc, Cheyenne M Beach, Elijah R Behr, J Martijn Bos, Marina Cerrone, Peter Covi, Bettina Cuneo, Isabelle Denjoy, Birgit Donner, Adrienne Elbert, Håkan Eliasson, Susan P Etheridge, Megumi Fukuyama, Francesca Girolami, Robert Hamilton, Minoru Horie, Maria Iascone, Juan Jiménez Jaimez, Henrik Kjærulf Jensen, Prince J Kannankeril, Juan P Kaski, Naomasa Makita, Carmen Muñoz-Esparza, Hans H Odland, Seiko Ohno, John Papagiannis, Alessandra Pia Porretta, Christopher Prandstetter, Vincent Probst, Tomas Robyns, Eric Rosenthal, Ferran Rosés-Noguer, Nicole Sekarski, Anoop Singh, Georgia Spentzou, Fridrike Stute, Jacob Tfelt-Hansen, Jan Till, Kathryn E Tobert, Jeffrey M Vinocur, Gregory Webster, Arthur A M Wilde, Cordula M Wolf, Michael J Ackerman, and Peter J Schwartz. Clinical presentation of calmodulin mutations: the international calmodulinopathy registry. European Heart Journal, 44:3357-3370, Aug 2023. URL: https://doi.org/10.1093/eurheartj/ehad418, doi:10.1093/eurheartj/ehad418. This article has 41 citations and is from a highest quality peer-reviewed journal.

  13. (crotti2023clinicalpresentationof pages 9-10): Lia Crotti, Carla Spazzolini, Mette Nyegaard, Michael T Overgaard, Maria-Christina Kotta, Federica Dagradi, Luca Sala, Takeshi Aiba, Mark D Ayers, Anwar Baban, Julien Barc, Cheyenne M Beach, Elijah R Behr, J Martijn Bos, Marina Cerrone, Peter Covi, Bettina Cuneo, Isabelle Denjoy, Birgit Donner, Adrienne Elbert, Håkan Eliasson, Susan P Etheridge, Megumi Fukuyama, Francesca Girolami, Robert Hamilton, Minoru Horie, Maria Iascone, Juan Jiménez Jaimez, Henrik Kjærulf Jensen, Prince J Kannankeril, Juan P Kaski, Naomasa Makita, Carmen Muñoz-Esparza, Hans H Odland, Seiko Ohno, John Papagiannis, Alessandra Pia Porretta, Christopher Prandstetter, Vincent Probst, Tomas Robyns, Eric Rosenthal, Ferran Rosés-Noguer, Nicole Sekarski, Anoop Singh, Georgia Spentzou, Fridrike Stute, Jacob Tfelt-Hansen, Jan Till, Kathryn E Tobert, Jeffrey M Vinocur, Gregory Webster, Arthur A M Wilde, Cordula M Wolf, Michael J Ackerman, and Peter J Schwartz. Clinical presentation of calmodulin mutations: the international calmodulinopathy registry. European Heart Journal, 44:3357-3370, Aug 2023. URL: https://doi.org/10.1093/eurheartj/ehad418, doi:10.1093/eurheartj/ehad418. This article has 41 citations and is from a highest quality peer-reviewed journal.

  14. (crotti2023clinicalpresentationof pages 2-3): Lia Crotti, Carla Spazzolini, Mette Nyegaard, Michael T Overgaard, Maria-Christina Kotta, Federica Dagradi, Luca Sala, Takeshi Aiba, Mark D Ayers, Anwar Baban, Julien Barc, Cheyenne M Beach, Elijah R Behr, J Martijn Bos, Marina Cerrone, Peter Covi, Bettina Cuneo, Isabelle Denjoy, Birgit Donner, Adrienne Elbert, Håkan Eliasson, Susan P Etheridge, Megumi Fukuyama, Francesca Girolami, Robert Hamilton, Minoru Horie, Maria Iascone, Juan Jiménez Jaimez, Henrik Kjærulf Jensen, Prince J Kannankeril, Juan P Kaski, Naomasa Makita, Carmen Muñoz-Esparza, Hans H Odland, Seiko Ohno, John Papagiannis, Alessandra Pia Porretta, Christopher Prandstetter, Vincent Probst, Tomas Robyns, Eric Rosenthal, Ferran Rosés-Noguer, Nicole Sekarski, Anoop Singh, Georgia Spentzou, Fridrike Stute, Jacob Tfelt-Hansen, Jan Till, Kathryn E Tobert, Jeffrey M Vinocur, Gregory Webster, Arthur A M Wilde, Cordula M Wolf, Michael J Ackerman, and Peter J Schwartz. Clinical presentation of calmodulin mutations: the international calmodulinopathy registry. European Heart Journal, 44:3357-3370, Aug 2023. URL: https://doi.org/10.1093/eurheartj/ehad418, doi:10.1093/eurheartj/ehad418. This article has 41 citations and is from a highest quality peer-reviewed journal.

  15. (crotti2023clinicalpresentationof pages 4-5): Lia Crotti, Carla Spazzolini, Mette Nyegaard, Michael T Overgaard, Maria-Christina Kotta, Federica Dagradi, Luca Sala, Takeshi Aiba, Mark D Ayers, Anwar Baban, Julien Barc, Cheyenne M Beach, Elijah R Behr, J Martijn Bos, Marina Cerrone, Peter Covi, Bettina Cuneo, Isabelle Denjoy, Birgit Donner, Adrienne Elbert, Håkan Eliasson, Susan P Etheridge, Megumi Fukuyama, Francesca Girolami, Robert Hamilton, Minoru Horie, Maria Iascone, Juan Jiménez Jaimez, Henrik Kjærulf Jensen, Prince J Kannankeril, Juan P Kaski, Naomasa Makita, Carmen Muñoz-Esparza, Hans H Odland, Seiko Ohno, John Papagiannis, Alessandra Pia Porretta, Christopher Prandstetter, Vincent Probst, Tomas Robyns, Eric Rosenthal, Ferran Rosés-Noguer, Nicole Sekarski, Anoop Singh, Georgia Spentzou, Fridrike Stute, Jacob Tfelt-Hansen, Jan Till, Kathryn E Tobert, Jeffrey M Vinocur, Gregory Webster, Arthur A M Wilde, Cordula M Wolf, Michael J Ackerman, and Peter J Schwartz. Clinical presentation of calmodulin mutations: the international calmodulinopathy registry. European Heart Journal, 44:3357-3370, Aug 2023. URL: https://doi.org/10.1093/eurheartj/ehad418, doi:10.1093/eurheartj/ehad418. This article has 41 citations and is from a highest quality peer-reviewed journal.

  16. (jensen2024calmodulinvariantsin pages 25-27): PhD Helene Halkjær Jensen, PhD Malene Brohus, BSc John W. Hussey III, Ana-Octavia Busuioc MSc, MSc Emil Drivsholm Iversen, MSc Faezeh Darki, MSc Gabriela Dobromirova Nikolova, MSc Amalie El-ton Baisgaard, PhD Palle Duun Rohde, Ida Elisabeth, M. D. Gad Holm, PhD Andrew McQuillin, PhD Tor-ben Moos, PhD Ivy E. Dick, PhD Michael Toft Overgaard, and M. Nyegaard. Calmodulin variants in schizophrenia patients display gain-of-function or loss-of-function effects. MedRxiv, May 2024. URL: https://doi.org/10.1101/2024.05.22.24307674, doi:10.1101/2024.05.22.24307674. This article has 2 citations.

  17. (crotti2023clinicalpresentationof pages 12-13): Lia Crotti, Carla Spazzolini, Mette Nyegaard, Michael T Overgaard, Maria-Christina Kotta, Federica Dagradi, Luca Sala, Takeshi Aiba, Mark D Ayers, Anwar Baban, Julien Barc, Cheyenne M Beach, Elijah R Behr, J Martijn Bos, Marina Cerrone, Peter Covi, Bettina Cuneo, Isabelle Denjoy, Birgit Donner, Adrienne Elbert, Håkan Eliasson, Susan P Etheridge, Megumi Fukuyama, Francesca Girolami, Robert Hamilton, Minoru Horie, Maria Iascone, Juan Jiménez Jaimez, Henrik Kjærulf Jensen, Prince J Kannankeril, Juan P Kaski, Naomasa Makita, Carmen Muñoz-Esparza, Hans H Odland, Seiko Ohno, John Papagiannis, Alessandra Pia Porretta, Christopher Prandstetter, Vincent Probst, Tomas Robyns, Eric Rosenthal, Ferran Rosés-Noguer, Nicole Sekarski, Anoop Singh, Georgia Spentzou, Fridrike Stute, Jacob Tfelt-Hansen, Jan Till, Kathryn E Tobert, Jeffrey M Vinocur, Gregory Webster, Arthur A M Wilde, Cordula M Wolf, Michael J Ackerman, and Peter J Schwartz. Clinical presentation of calmodulin mutations: the international calmodulinopathy registry. European Heart Journal, 44:3357-3370, Aug 2023. URL: https://doi.org/10.1093/eurheartj/ehad418, doi:10.1093/eurheartj/ehad418. This article has 41 citations and is from a highest quality peer-reviewed journal.

  18. (jensen2024calmodulinvariantsin pages 3-5): PhD Helene Halkjær Jensen, PhD Malene Brohus, BSc John W. Hussey III, Ana-Octavia Busuioc MSc, MSc Emil Drivsholm Iversen, MSc Faezeh Darki, MSc Gabriela Dobromirova Nikolova, MSc Amalie El-ton Baisgaard, PhD Palle Duun Rohde, Ida Elisabeth, M. D. Gad Holm, PhD Andrew McQuillin, PhD Tor-ben Moos, PhD Ivy E. Dick, PhD Michael Toft Overgaard, and M. Nyegaard. Calmodulin variants in schizophrenia patients display gain-of-function or loss-of-function effects. MedRxiv, May 2024. URL: https://doi.org/10.1101/2024.05.22.24307674, doi:10.1101/2024.05.22.24307674. This article has 2 citations.

  19. (jensen2024calmodulinvariantsin pages 10-12): PhD Helene Halkjær Jensen, PhD Malene Brohus, BSc John W. Hussey III, Ana-Octavia Busuioc MSc, MSc Emil Drivsholm Iversen, MSc Faezeh Darki, MSc Gabriela Dobromirova Nikolova, MSc Amalie El-ton Baisgaard, PhD Palle Duun Rohde, Ida Elisabeth, M. D. Gad Holm, PhD Andrew McQuillin, PhD Tor-ben Moos, PhD Ivy E. Dick, PhD Michael Toft Overgaard, and M. Nyegaard. Calmodulin variants in schizophrenia patients display gain-of-function or loss-of-function effects. MedRxiv, May 2024. URL: https://doi.org/10.1101/2024.05.22.24307674, doi:10.1101/2024.05.22.24307674. This article has 2 citations.

  20. (jensen2024calmodulinvariantsin pages 12-16): PhD Helene Halkjær Jensen, PhD Malene Brohus, BSc John W. Hussey III, Ana-Octavia Busuioc MSc, MSc Emil Drivsholm Iversen, MSc Faezeh Darki, MSc Gabriela Dobromirova Nikolova, MSc Amalie El-ton Baisgaard, PhD Palle Duun Rohde, Ida Elisabeth, M. D. Gad Holm, PhD Andrew McQuillin, PhD Tor-ben Moos, PhD Ivy E. Dick, PhD Michael Toft Overgaard, and M. Nyegaard. Calmodulin variants in schizophrenia patients display gain-of-function or loss-of-function effects. MedRxiv, May 2024. URL: https://doi.org/10.1101/2024.05.22.24307674, doi:10.1101/2024.05.22.24307674. This article has 2 citations.

  21. (nguyen2022longqtsyndrome pages 9-10): Thi Huynh Nga Nguyen, Chi Bao Bui, Vuong Thao Vy Nguyen, Manh Cong Nguyen, Nguyen Thanh Tung Vu, and Minh Hiep Nguyen. Long qt syndrome: identification of a novel de novo mutation of calmodulin in a newborn girl. Biomedical Research and Therapy, 9:4822-4831, Jan 2022. URL: https://doi.org/10.15419/bmrat.v9i1.719, doi:10.15419/bmrat.v9i1.719. This article has 0 citations.

  22. (crotti2023clinicalpresentationof pages 4-4): Lia Crotti, Carla Spazzolini, Mette Nyegaard, Michael T Overgaard, Maria-Christina Kotta, Federica Dagradi, Luca Sala, Takeshi Aiba, Mark D Ayers, Anwar Baban, Julien Barc, Cheyenne M Beach, Elijah R Behr, J Martijn Bos, Marina Cerrone, Peter Covi, Bettina Cuneo, Isabelle Denjoy, Birgit Donner, Adrienne Elbert, Håkan Eliasson, Susan P Etheridge, Megumi Fukuyama, Francesca Girolami, Robert Hamilton, Minoru Horie, Maria Iascone, Juan Jiménez Jaimez, Henrik Kjærulf Jensen, Prince J Kannankeril, Juan P Kaski, Naomasa Makita, Carmen Muñoz-Esparza, Hans H Odland, Seiko Ohno, John Papagiannis, Alessandra Pia Porretta, Christopher Prandstetter, Vincent Probst, Tomas Robyns, Eric Rosenthal, Ferran Rosés-Noguer, Nicole Sekarski, Anoop Singh, Georgia Spentzou, Fridrike Stute, Jacob Tfelt-Hansen, Jan Till, Kathryn E Tobert, Jeffrey M Vinocur, Gregory Webster, Arthur A M Wilde, Cordula M Wolf, Michael J Ackerman, and Peter J Schwartz. Clinical presentation of calmodulin mutations: the international calmodulinopathy registry. European Heart Journal, 44:3357-3370, Aug 2023. URL: https://doi.org/10.1093/eurheartj/ehad418, doi:10.1093/eurheartj/ehad418. This article has 41 citations and is from a highest quality peer-reviewed journal.

📄 View Raw YAML

id: P0DP23
gene_symbol: CALM1
taxon:
  id: NCBITaxon:9606
  label: Homo sapiens
description: Calmodulin-1 is a ubiquitous calcium-binding messenger protein that serves
  as the primary intracellular calcium sensor in eukaryotic cells. Through its four
  EF-hand domains, CALM1 binds calcium ions and undergoes conformational changes that
  enable it to interact with and regulate over 100 different target proteins including
  kinases, phosphatases, ion channels, and cytoskeletal proteins. It plays essential
  roles in muscle contraction, neurotransmitter release, cell cycle progression, and
  calcium homeostasis. Mutations in CALM1 cause severe cardiac arrhythmias including
  catecholaminergic polymorphic ventricular tachycardia (CPVT) and long QT syndrome
  (LQTS), which can lead to sudden cardiac death. The protein is also exploited by
  bacterial pathogens such as Shigella flexneri whose effector proteins bind the apo
  form of calmodulin to disrupt calcium signaling during infection.
existing_annotations:
- term:
    id: GO:0005509
    label: calcium ion binding
  evidence_type: IBA
  original_reference_id: GO_REF:0000033
  review:
    summary: Core calcium-binding function of calmodulin with 4 EF-hand domains. Well-supported
      by multiple experimental studies and essential for all downstream calcium-mediated
      functions.
    action: ACCEPT
    reason: This is the fundamental molecular function of calmodulin. Multiple experimental
      studies confirm calcium binding through 4 EF-hand domains (PMID:23040497, PMID:31454269,
      PMID:26164367, PMID:26969752, PMID:27516456). IBA annotation is well-founded
      based on phylogenetic conservation.
    supported_by:
    - reference_id: PMID:23040497
      supporting_text: Both CALM1 substitutions demonstrated compromised calcium binding
    - reference_id: file:human/CALM1/CALM1-deep-research-falcon.md
      supporting_text: See deep research file for comprehensive analysis
    - reference_id: file:human/CALM1/CALM1-falcon-research.md
      supporting_text: See deep research file for comprehensive analysis
- term:
    id: GO:0005634
    label: nucleus
  evidence_type: IBA
  original_reference_id: GO_REF:0000033
  review:
    summary: Nuclear localization supported by high-throughput proteomic study but
      not core function.
    action: KEEP_AS_NON_CORE
    reason: While HDA evidence (PMID:21630459) confirms nuclear presence in sperm,
      and Reactome annotations indicate nuclear processes, this is not a core localization
      for CALM1 function. Primary functions occur in cytoplasm, centrosome, and membrane-associated
      complexes.
    supported_by:
    - reference_id: PMID:21630459
      supporting_text: Proteomic characterization of the human sperm nucleus
- term:
    id: GO:0010880
    label: regulation of release of sequestered calcium ion into cytosol by sarcoplasmic
      reticulum
  evidence_type: IBA
  original_reference_id: GO_REF:0000033
  review:
    summary: Core cardiac function regulating calcium release from sarcoplasmic reticulum
      via RyR2 interaction.
    action: ACCEPT
    reason: Essential cardiac function confirmed by multiple studies showing CALM1
      regulates RyR2-mediated calcium release. Mutations cause CPVT through defective
      RyR2 regulation. IDA evidence (PMID:20226167) directly supports this function.
    supported_by:
    - reference_id: PMID:20226167
      supporting_text: cAMP caused a significant decrease of the CaM-binding affinity
        in KI hearts...the addition of a high concentration of CaM attenuated the
        aberrant increase of Ca(2+) sparks
- term:
    id: GO:0005513
    label: detection of calcium ion
  evidence_type: IBA
  original_reference_id: GO_REF:0000033
  review:
    summary: Core calcium sensing function - undergoes conformational change upon
      calcium binding to activate downstream targets.
    action: ACCEPT
    reason: This is the essential calcium sensor function of calmodulin. Upon binding
      calcium, CALM1 undergoes conformational changes that enable interaction with
      and activation of numerous targets. Well-supported by structural and functional
      studies (PMID:23040497).
    supported_by:
    - reference_id: PMID:23040497
      supporting_text: Mutations in calmodulin cause ventricular tachycardia and sudden
        cardiac death...Both CALM1 substitutions demonstrated compromised calcium
        binding
- term:
    id: GO:0097720
    label: calcineurin-mediated signaling
  evidence_type: IBA
  original_reference_id: GO_REF:0000033
  review:
    summary: Core signaling function - CALM1 binds and activates calcineurin phosphatase
      in calcium-dependent manner.
    action: ACCEPT
    reason: Essential calcium-dependent signaling pathway. CALM1 binds calcineurin
      and is required for its phosphatase activity. IDA evidence (PMID:8631777) directly
      demonstrates this interaction. Critical for NFAT signaling and immune responses.
    supported_by:
    - reference_id: PMID:8631777
      supporting_text: Blocking the Ca2+-induced conformational transitions in calmodulin
        with disulfide bonds
- term:
    id: GO:0005737
    label: cytoplasm
  evidence_type: IBA
  original_reference_id: GO_REF:0000033
  review:
    summary: Core cytoplasmic localization where CALM1 performs most calcium-sensing
      and signaling functions.
    action: ACCEPT
    reason: Primary cellular compartment for CALM1 function. TAS evidence (PMID:10899953)
      and IDA evidence (PMID:27165696) confirm cytoplasmic localization. Essential
      for interaction with cytoplasmic targets.
    supported_by:
    - reference_id: PMID:27165696
      supporting_text: Arrhythmogenic calmodulin mutations impede activation of small-conductance
        calcium-activated potassium current
    - reference_id: PMID:10899953
      supporting_text: Calmodulin regulation of basal and agonist-stimulated G protein
        coupling
- term:
    id: GO:0005813
    label: centrosome
  evidence_type: IBA
  original_reference_id: GO_REF:0000033
  review:
    summary: Important centrosomal localization for cell division regulation through
      interaction with CP110.
    action: ACCEPT
    reason: Well-documented centrosomal localization with functional significance.
      IDA evidence (PMID:16760425) shows CALM1 at centrosomes interacting with CP110
      to regulate cytokinesis. Essential for proper cell division.
    supported_by:
    - reference_id: PMID:16760425
      supporting_text: CP110 interacts with two different Ca2+-binding proteins, calmodulin
        (CaM) and centrin, in vivo
- term:
    id: GO:0043209
    label: myelin sheath
  evidence_type: IBA
  original_reference_id: GO_REF:0000033
  review:
    summary: Myelin sheath localization likely related to interaction with myelin
      basic protein.
    action: KEEP_AS_NON_CORE
    reason: While CALM1 interacts with myelin basic protein (PMID:19855925) and may
      have roles in myelin, this is not a core function. The IEA annotation (GO_REF:0000120)
      also supports this but represents a specialized, tissue-specific role.
    supported_by:
    - reference_id: PMID:19855925
      supporting_text: Structural analysis of the complex between calmodulin and full-length
        myelin basic protein, an intrinsically disordered molecule
- term:
    id: GO:0000922
    label: spindle pole
  evidence_type: IEA
  original_reference_id: GO_REF:0000120
  review:
    summary: Spindle pole localization supported by experimental evidence for cell
      division regulation.
    action: ACCEPT
    reason: IDA evidence (PMID:16760425) directly demonstrates CALM1 localization
      at spindle poles during mitosis, where it regulates cytokinesis through CP110
      interaction. Important for proper cell division.
    supported_by:
    - reference_id: PMID:16760425
      supporting_text: CP110 cooperates with two calcium-binding proteins to regulate
        cytokinesis and genome stability
- term:
    id: GO:0002027
    label: regulation of heart rate
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: Core cardiac function - CALM1 mutations cause arrhythmias demonstrating
      essential role in heart rate regulation.
    action: ACCEPT
    reason: Critical cardiac function directly demonstrated by human genetics. IMP
      evidence (PMID:23040497) shows CALM1 mutations cause ventricular tachycardia
      and sudden cardiac death through disrupted heart rate regulation.
    supported_by:
    - reference_id: PMID:23040497
      supporting_text: Mutations in calmodulin cause ventricular tachycardia and sudden
        cardiac death
- term:
    id: GO:0005246
    label: calcium channel regulator activity
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: Core function - CALM1 regulates multiple calcium channels including L-type
      and ryanodine receptors.
    action: ACCEPT
    reason: Essential molecular function supported by extensive evidence. IDA evidence
      (PMID:20226167) shows RyR2 regulation. CALM1 mutations disrupt calcium channel
      regulation causing cardiac arrhythmias (PMID:31454269, PMID:26969752).
    supported_by:
    - reference_id: PMID:20226167
      supporting_text: Defective calmodulin binding to the cardiac ryanodine receptor
        plays a key role in CPVT-associated channel dysfunction
    - reference_id: PMID:26969752
      supporting_text: alter the properties of the cardiac L-type calcium channel
- term:
    id: GO:0005509
    label: calcium ion binding
  evidence_type: IEA
  original_reference_id: GO_REF:0000120
  review:
    summary: Duplicate annotation with different evidence code - core function.
    action: ACCEPT
    reason: Same core calcium binding function as IBA annotation but from combined
      automated methods. Redundant but correct.
    supported_by:
    - reference_id: GO_REF:0000120
      supporting_text: Combined Automated Annotation using Multiple IEA Methods
- term:
    id: GO:0005513
    label: detection of calcium ion
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: Duplicate of IBA annotation - core calcium sensing function.
    action: ACCEPT
    reason: Same essential calcium sensing function as IBA annotation but from ARBA
      machine learning. Redundant but correct.
    supported_by:
    - reference_id: GO_REF:0000117
      supporting_text: Electronic Gene Ontology annotations created by ARBA machine
        learning models
- term:
    id: GO:0005813
    label: centrosome
  evidence_type: IEA
  original_reference_id: GO_REF:0000120
  review:
    summary: Duplicate centrosome annotation - already covered by IBA.
    action: ACCEPT
    reason: Same centrosomal localization as IBA annotation. Supported by IDA evidence
      (PMID:16760425).
    supported_by:
    - reference_id: PMID:16760425
      supporting_text: CP110 cooperates with two calcium-binding proteins to regulate
        cytokinesis and genome stability
- term:
    id: GO:0005819
    label: spindle
  evidence_type: IEA
  original_reference_id: GO_REF:0000044
  review:
    summary: Spindle localization for cell division regulation.
    action: ACCEPT
    reason: Consistent with spindle pole and spindle microtubule localizations. CALM1
      regulates mitotic progression and cytokinesis at spindle.
    supported_by:
    - reference_id: GO_REF:0000044
      supporting_text: Gene Ontology annotation based on UniProtKB/Swiss-Prot Subcellular
        Location vocabulary mapping
- term:
    id: GO:0005876
    label: spindle microtubule
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: Spindle microtubule localization for mitosis regulation.
    action: ACCEPT
    reason: IDA evidence (PMID:16760425) confirms spindle microtubule localization.
      CALM1 with CP110 regulates spindle function and cytokinesis.
    supported_by:
    - reference_id: PMID:16760425
      supporting_text: CP110 cooperates with two calcium-binding proteins to regulate
        cytokinesis and genome stability
- term:
    id: GO:0010856
    label: adenylate cyclase activator activity
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: CALM1 activates adenylate cyclase, particularly bacterial adenylyl cyclase
      exotoxin.
    action: ACCEPT
    reason: IDA evidence (PMID:11807546) demonstrates direct activation of adenylyl
      cyclase by calmodulin. Important for cAMP signaling and exploited by bacterial
      pathogens like anthrax.
    supported_by:
    - reference_id: PMID:11807546
      supporting_text: Structural basis for the activation of anthrax adenylyl cyclase
        exotoxin by calmodulin
- term:
    id: GO:0010881
    label: regulation of cardiac muscle contraction by regulation of the release of
      sequestered calcium ion
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: Core cardiac function regulating calcium-induced calcium release in cardiac
      muscle.
    action: ACCEPT
    reason: Essential cardiac function with strong experimental support. IDA evidence
      (PMID:23040497, PMID:20226167) demonstrates CALM1 regulation of RyR2-mediated
      calcium release critical for cardiac contraction. Mutations cause CPVT.
    supported_by:
    - reference_id: PMID:23040497
      supporting_text: Mutations in calmodulin cause ventricular tachycardia and sudden
        cardiac death
    - reference_id: PMID:20226167
      supporting_text: Defective calmodulin binding to the cardiac ryanodine receptor
        plays a key role in CPVT-associated channel dysfunction
- term:
    id: GO:0019901
    label: protein kinase binding
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: Core function - CALM1 binds and regulates multiple protein kinases including
      CaMKII.
    action: ACCEPT
    reason: Essential function of calmodulin to bind and regulate calcium-dependent
      protein kinases. IPI evidence (PMID:20668654) demonstrates direct CaMKII binding.
      Critical for calcium signal transduction.
    supported_by:
    - reference_id: PMID:20668654
      supporting_text: Structure of the CaMKIIdelta/calmodulin complex reveals the
        molecular mechanism of CaMKII kinase activation
- term:
    id: GO:0030017
    label: sarcomere
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: Sarcomere localization for muscle contraction regulation.
    action: ACCEPT
    reason: IDA evidence (PMID:20226167) demonstrates sarcomeric localization. CALM1
      regulates muscle contraction through RyR2 and titin interactions at sarcomere.
    supported_by:
    - reference_id: PMID:20226167
      supporting_text: Defective calmodulin binding to the cardiac ryanodine receptor
        plays a key role in CPVT-associated channel dysfunction
- term:
    id: GO:0031432
    label: titin binding
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: CALM1 binds titin kinase domain in cardiac muscle for mechanosensing.
    action: ACCEPT
    reason: IPI evidence (PMID:7607248) demonstrates direct calmodulin binding to
      cardiac titin kinase C-terminus. Important for cardiac mechanosensing and muscle
      regulation.
    supported_by:
    - reference_id: PMID:7607248
      supporting_text: A calmodulin-binding sequence in the C-terminus of human cardiac
        titin kinase
- term:
    id: GO:0031514
    label: motile cilium
  evidence_type: IEA
  original_reference_id: GO_REF:0000044
  review:
    summary: Ciliary localization based on subcellular location mapping.
    action: KEEP_AS_NON_CORE
    reason: Based on UniProt subcellular location vocabulary mapping. CALM1 may regulate
      ciliary beating through calcium signaling but this is specialized, not core
      function.
    supported_by:
    - reference_id: GO_REF:0000044
      supporting_text: Gene Ontology annotation based on UniProtKB/Swiss-Prot Subcellular
        Location vocabulary mapping
- term:
    id: GO:0032465
    label: regulation of cytokinesis
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: Important cell division function through CP110 interaction at centrosomes.
    action: ACCEPT
    reason: IMP evidence (PMID:16760425) demonstrates CALM1 depletion causes cytokinesis
      failure and binucleate cells. Works with CP110 and centrin at spindle poles
      to regulate cell division completion.
    supported_by:
    - reference_id: PMID:16760425
      supporting_text: CP110 cooperates with two calcium-binding proteins to regulate
        cytokinesis and genome stability...depletion leads to a failure at a late
        stage of cytokinesis and the formation of binucleate cells
- term:
    id: GO:0034704
    label: calcium channel complex
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: CALM1 associates with calcium channel complexes for regulation.
    action: ACCEPT
    reason: IDA evidence (PMID:23040497) confirms localization to calcium channel
      complexes. CALM1 directly regulates L-type and ryanodine receptor calcium channels
      as part of channel complexes.
    supported_by:
    - reference_id: PMID:23040497
      supporting_text: Mutations in calmodulin cause ventricular tachycardia and sudden
        cardiac death
- term:
    id: GO:0043539
    label: protein serine/threonine kinase activator activity
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: Core function - CALM1 activates multiple serine/threonine kinases including
      CaMKII in calcium-dependent manner.
    action: ACCEPT
    reason: Essential molecular function with extensive experimental support. IDA
      evidence from multiple studies (PMID:35568036, PMID:14722083) demonstrates direct
      kinase activation. TAS evidence (PMID:20668654) confirms CaMKII activation mechanism.
    supported_by:
    - reference_id: PMID:35568036
      supporting_text: A family of conserved bacterial virulence factors dampens interferon
        responses by blocking calcium signaling
    - reference_id: PMID:14722083
      supporting_text: Comparative analyses of the three-dimensional structures and
        enzymatic properties of alpha, beta, gamma and delta isoforms of Ca2+-calmodulin-dependent
        protein kinase II
- term:
    id: GO:0046872
    label: metal ion binding
  evidence_type: IEA
  original_reference_id: GO_REF:0000043
  review:
    summary: Too general - calcium ion binding is the specific function.
    action: MODIFY
    reason: While technically correct (calcium is a metal ion), this term is too general.
      GO:0005509 (calcium ion binding) is the appropriate specific term that captures
      the actual function.
    proposed_replacement_terms:
    - id: GO:0005509
      label: calcium ion binding
    supported_by:
    - reference_id: GO_REF:0000043
      supporting_text: Gene Ontology annotation based on UniProtKB/Swiss-Prot keyword
        mapping
- term:
    id: GO:0060291
    label: long-term synaptic potentiation
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: Important neuronal function through CaMKII activation in synaptic plasticity.
    action: KEEP_AS_NON_CORE
    reason: Valid neuronal function supported by TAS evidence (PMID:20668654) showing
      CaMKII-calmodulin complex role in LTP. However, this is tissue-specific (brain)
      rather than core ubiquitous function.
    supported_by:
    - reference_id: PMID:20668654
      supporting_text: Structure of the CaMKIIdelta/calmodulin complex reveals the
        molecular mechanism of CaMKII kinase activation
- term:
    id: GO:0072542
    label: protein phosphatase activator activity
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: Core function - CALM1 activates calcineurin phosphatase in calcium-dependent
      manner.
    action: ACCEPT
    reason: Essential molecular function for phosphatase regulation. IDA evidence
      (PMID:8631777) demonstrates direct calcineurin activation by calmodulin. Critical
      for NFAT signaling and numerous cellular processes.
    supported_by:
    - reference_id: PMID:8631777
      supporting_text: Blocking the Ca2+-induced conformational transitions in calmodulin
        with disulfide bonds
- term:
    id: GO:0097720
    label: calcineurin-mediated signaling
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: Duplicate of IBA annotation - core signaling function.
    action: ACCEPT
    reason: Same calcineurin signaling function as IBA annotation. IDA evidence (PMID:8631777)
      supports this.
    supported_by:
    - reference_id: PMID:8631777
      supporting_text: Blocking the Ca2+-induced conformational transitions in calmodulin
        with disulfide bonds
- term:
    id: GO:1901844
    label: regulation of cell communication by electrical coupling involved in cardiac
      conduction
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: Core cardiac conduction function - CALM1 mutations disrupt electrical
      coupling causing arrhythmias.
    action: ACCEPT
    reason: Essential cardiac function with strong experimental support. IDA evidence
      (PMID:23040497) shows CALM1 mutations cause defective cardiac conduction. Critical
      for maintaining proper heart rhythm through ion channel regulation.
    supported_by:
    - reference_id: PMID:23040497
      supporting_text: Mutations in calmodulin cause ventricular tachycardia and sudden
        cardiac death...characterized by episodic syncope and/or sudden cardiac arrest
        during exercise or acute emotion
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:30842726
  review:
    summary: Generic protein binding annotation for IQSEC2 interaction, lacks specificity.
    action: MODIFY
    reason: While the interaction with IQSEC2 is valid (PMID:30842726), the generic
      "protein binding" term provides no functional information. Should use more specific
      terms related to the actual function.
    proposed_replacement_terms:
    - id: GO:0008047
      label: enzyme activator activity
    - id: GO:0030276
      label: clathrin binding
    supported_by:
    - reference_id: PMID:30842726
      supporting_text: An IQSEC2 Mutation Associated With Intellectual Disability
        and Autism Results in Decreased Surface AMPA Receptors
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:31983428
  review:
    summary: Generic protein binding for IDH1 interaction, lacks functional specificity.
    action: MODIFY
    reason: Interaction with IDH1 is documented (PMID:31983428) but generic protein
      binding term uninformative. Need more specific functional annotation.
    proposed_replacement_terms:
    - id: GO:0008047
      label: enzyme activator activity
    supported_by:
    - reference_id: PMID:31983428
      supporting_text: Interaction between IDH1 WT and calmodulin and its implications
        for glioblastoma cell growth and migration
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:35271311
  review:
    summary: Generic protein binding from OpenCell proteomics study.
    action: REMOVE
    reason: This is from a large-scale proteomics study (PMID:35271311 - OpenCell)
      and the generic protein binding term adds no functional information beyond what
      is already captured by more specific binding annotations.
    supported_by:
    - reference_id: PMID:35271311
      supporting_text: 'OpenCell: Endogenous tagging for the cartography of human
        cellular organization'
- term:
    id: GO:0000086
    label: G2/M transition of mitotic cell cycle
  evidence_type: IEA
  original_reference_id: GO_REF:0000120
  review:
    summary: CALM1 regulates G2/M transition through centrosome/spindle functions.
    action: ACCEPT
    reason: Consistent with demonstrated role in cytokinesis and spindle regulation
      through CP110 interaction (PMID:16760425). CALM1 required for proper mitotic
      progression.
    supported_by:
    - reference_id: PMID:16760425
      supporting_text: CP110 cooperates with two calcium-binding proteins to regulate
        cytokinesis and genome stability
- term:
    id: GO:0008076
    label: voltage-gated potassium channel complex
  evidence_type: IEA
  original_reference_id: GO_REF:0000120
  review:
    summary: CALM1 regulates voltage-gated potassium channels like KCNQ.
    action: ACCEPT
    reason: Well-documented interaction with KCNQ channels. PMID:27564677 shows CALM1
      binding to KCNQ/M-channels. Important for neuronal excitability and cardiac
      repolarization.
    supported_by:
    - reference_id: PMID:27564677
      supporting_text: Structural Insights into the M-Channel Proximal C-Terminus/Calmodulin
        Complex
- term:
    id: GO:0016020
    label: membrane
  evidence_type: IEA
  original_reference_id: GO_REF:0000107
  review:
    summary: Too general - specific membrane systems are better annotated.
    action: REMOVE
    reason: Generic membrane annotation adds no value beyond specific membrane localizations
      already annotated (plasma membrane, ER contacts, etc.). Based on ortholog transfer.
    supported_by:
    - reference_id: GO_REF:0000107
      supporting_text: Automatic transfer of experimentally verified manual GO annotation
        data to orthologs
- term:
    id: GO:0031982
    label: vesicle
  evidence_type: IEA
  original_reference_id: GO_REF:0000107
  review:
    summary: General vesicle localization supported by exosome study.
    action: KEEP_AS_NON_CORE
    reason: HDA evidence (PMID:19190083) shows presence in exosome-like vesicles from
      epithelium. Valid but not core function - likely reflects calcium role in vesicle
      trafficking.
    supported_by:
    - reference_id: PMID:19190083
      supporting_text: 'Characterization of exosome-like vesicles released from human
        tracheobronchial ciliated epithelium: a possible role in innate defense'
- term:
    id: GO:0043209
    label: myelin sheath
  evidence_type: IEA
  original_reference_id: GO_REF:0000120
  review:
    summary: Duplicate myelin sheath annotation - already reviewed as non-core.
    action: KEEP_AS_NON_CORE
    reason: Same myelin localization as IBA annotation. Related to MBP interaction
      but specialized nervous system function.
    supported_by:
    - reference_id: PMID:19855925
      supporting_text: Structural analysis of the complex between calmodulin and full-length
        myelin basic protein
- term:
    id: GO:0044305
    label: calyx of Held
  evidence_type: IEA
  original_reference_id: GO_REF:0000120
  review:
    summary: Specialized synaptic localization in auditory brainstem.
    action: REMOVE
    reason: Highly specialized neuroanatomical location based on automated annotation.
      No specific evidence for CALM1 enrichment or unique function at this giant synapse
      beyond general synaptic roles.
    supported_by:
    - reference_id: GO_REF:0000120
      supporting_text: Combined Automated Annotation using Multiple IEA Methods
- term:
    id: GO:0048306
    label: calcium-dependent protein binding
  evidence_type: IEA
  original_reference_id: GO_REF:0000107
  review:
    summary: Core molecular function - CALM1 binding to targets is calcium-dependent,
      enabling signal transduction.
    action: ACCEPT
    reason: This captures the essential calcium-dependent nature of calmodulin interactions
      with target proteins. Upon calcium binding, CALM1 undergoes conformational changes
      enabling target binding. Fundamental to its function as a calcium sensor.
    supported_by:
    - reference_id: PMID:8631777
      supporting_text: Blocking the Ca2+-induced conformational transitions in calmodulin
        with disulfide bonds
- term:
    id: GO:0050848
    label: regulation of calcium-mediated signaling
  evidence_type: IEA
  original_reference_id: GO_REF:0000107
  review:
    summary: Core function as master regulator of calcium signaling pathways.
    action: ACCEPT
    reason: This is the overarching biological process that CALM1 mediates - translating
      calcium signals into cellular responses through activation of various effectors.
      Central to its role as ubiquitous calcium sensor.
    supported_by:
    - reference_id: PMID:35568036
      supporting_text: A family of conserved bacterial virulence factors dampens interferon
        responses by blocking calcium signaling
- term:
    id: GO:0097225
    label: sperm midpiece
  evidence_type: IEA
  original_reference_id: GO_REF:0000107
  review:
    summary: Sperm-specific localization, not core function.
    action: KEEP_AS_NON_CORE
    reason: Based on ortholog evidence. CALM1 likely plays role in sperm motility
      through calcium signaling but this is specialized reproductive function, not
      core ubiquitous role.
    supported_by:
    - reference_id: GO_REF:0000107
      supporting_text: Automatic transfer of experimentally verified manual GO annotation
        data to orthologs
- term:
    id: GO:0099523
    label: presynaptic cytosol
  evidence_type: IEA
  original_reference_id: GO_REF:0000107
  review:
    summary: Neuronal synaptic localization for neurotransmitter release regulation.
    action: KEEP_AS_NON_CORE
    reason: Valid neuronal localization where CALM1 regulates synaptic vesicle release.
      Based on ortholog evidence. Important for synaptic function but tissue-specific
      rather than core.
    supported_by:
    - reference_id: GO_REF:0000107
      supporting_text: Automatic transfer of experimentally verified manual GO annotation
        data to orthologs
- term:
    id: GO:0140238
    label: presynaptic endocytosis
  evidence_type: IEA
  original_reference_id: GO_REF:0000120
  review:
    summary: Synaptic vesicle recycling function in neurons.
    action: KEEP_AS_NON_CORE
    reason: Valid neuronal function where CALM1 regulates synaptic vesicle endocytosis
      through calcium signaling. Tissue-specific process rather than core ubiquitous
      function.
    supported_by:
    - reference_id: GO_REF:0000120
      supporting_text: Combined Automated Annotation using Multiple IEA Methods
- term:
    id: GO:0141110
    label: transporter inhibitor activity
  evidence_type: IEA
  original_reference_id: GO_REF:0000107
  review:
    summary: Too general - specific channel regulation functions are better annotated.
    action: REMOVE
    reason: This generic transporter inhibitor term is less informative than the specific
      calcium channel and ion channel regulatory annotations already present. Based
      on ortholog transfer and redundant with more specific terms.
    supported_by:
    - reference_id: GO_REF:0000107
      supporting_text: Automatic transfer of experimentally verified manual GO annotation
        data to orthologs
- term:
    id: GO:1905913
    label: negative regulation of calcium ion export across plasma membrane
  evidence_type: IEA
  original_reference_id: GO_REF:0000107
  review:
    summary: Calcium homeostasis function through pump/exchanger regulation.
    action: KEEP_AS_NON_CORE
    reason: Valid function in calcium homeostasis but based on ortholog inference.
      Less central than direct channel regulation functions. May involve plasma membrane
      Ca2+-ATPase regulation.
    supported_by:
    - reference_id: GO_REF:0000107
      supporting_text: Automatic transfer of experimentally verified manual GO annotation
        data to orthologs
- term:
    id: GO:0010881
    label: regulation of cardiac muscle contraction by regulation of the release of
      sequestered calcium ion
  evidence_type: IDA
  original_reference_id: PMID:23040497
  review:
    summary: Duplicate IDA annotation - core cardiac function.
    action: ACCEPT
    reason: Same core cardiac function already annotated with IEA. Strong experimental
      evidence from calmodulinopathy study.
    supported_by:
    - reference_id: PMID:23040497
      supporting_text: Mutations in calmodulin cause ventricular tachycardia and sudden
        cardiac death
- term:
    id: GO:1901844
    label: regulation of cell communication by electrical coupling involved in cardiac
      conduction
  evidence_type: IDA
  original_reference_id: PMID:23040497
  review:
    summary: Duplicate IDA annotation - already covered by IEA.
    action: ACCEPT
    reason: Same cardiac conduction function as IEA annotation but with direct experimental
      evidence from human genetics.
    supported_by:
    - reference_id: PMID:23040497
      supporting_text: Catecholaminergic polymorphic ventricular tachycardia (CPVT)
        is a devastating inherited disorder characterized by episodic syncope and/or
        sudden cardiac arrest
- term:
    id: GO:0005246
    label: calcium channel regulator activity
  evidence_type: IDA
  original_reference_id: PMID:20226167
  review:
    summary: Duplicate IDA annotation for calcium channel regulation.
    action: ACCEPT
    reason: Same function as IEA annotation but with direct experimental evidence
      for RyR2 regulation.
    supported_by:
    - reference_id: PMID:20226167
      supporting_text: Defective calmodulin binding to the cardiac ryanodine receptor
        plays a key role in CPVT-associated channel dysfunction
- term:
    id: GO:0010881
    label: regulation of cardiac muscle contraction by regulation of the release of
      sequestered calcium ion
  evidence_type: IDA
  original_reference_id: PMID:20226167
  review:
    summary: Another duplicate - same cardiac function with different IDA evidence.
    action: ACCEPT
    reason: Same core function from different experimental study on CPVT and RyR2
      regulation.
    supported_by:
    - reference_id: PMID:20226167
      supporting_text: CPVT mutation causes defective inter-domain interaction, significant
        reduction in the ability of CaM binding to the RyR2, spontaneous Ca(2+) leak,
        and then lethal arrhythmia
- term:
    id: GO:0060291
    label: long-term synaptic potentiation
  evidence_type: TAS
  original_reference_id: PMID:20668654
  review:
    summary: Duplicate annotation with stronger evidence - neuronal function.
    action: KEEP_AS_NON_CORE
    reason: Same LTP function as IEA but with TAS evidence from CaMKII structural
      study. Important for learning/memory but tissue-specific.
    supported_by:
    - reference_id: PMID:20668654
      supporting_text: Structure of the CaMKIIdelta/calmodulin complex reveals the
        molecular mechanism of CaMKII kinase activation
- term:
    id: GO:0097720
    label: calcineurin-mediated signaling
  evidence_type: IDA
  original_reference_id: PMID:8631777
  review:
    summary: Duplicate with direct experimental evidence for calcineurin signaling.
    action: ACCEPT
    reason: Same core function as IBA/IEA annotations but with direct biochemical
      evidence.
    supported_by:
    - reference_id: PMID:8631777
      supporting_text: Blocking the Ca2+-induced conformational transitions in calmodulin
        with disulfide bonds
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-6786205
  review:
    summary: Cytosolic localization for methylation by KAMKMT.
    action: ACCEPT
    reason: TAS evidence from Reactome for cytosolic localization where CALM1 undergoes
      trimethylation. Core compartment for CALM1 function.
    supported_by:
    - reference_id: Reactome:R-HSA-6786205
      supporting_text: KAMKMT transfers 3xCH3 groups from 3xAdoMet to CALM1
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:11807546
  review:
    summary: Binding to anthrax adenylyl cyclase exotoxin - should be more specific.
    action: MODIFY
    reason: While interaction with anthrax toxin is valid (PMID:11807546), generic
      protein binding uninformative. The adenylate cyclase activator activity annotation
      better captures this function.
    proposed_replacement_terms:
    - id: GO:0010856
      label: adenylate cyclase activator activity
    supported_by:
    - reference_id: PMID:11807546
      supporting_text: Structural basis for the activation of anthrax adenylyl cyclase
        exotoxin by calmodulin
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:11984006
  review:
    summary: Interaction with Chediak-Higashi protein/LYST - specialized vesicle trafficking
      function.
    action: KEEP_AS_NON_CORE
    reason: IPI evidence (PMID:11984006) shows interaction with CHS protein involved
      in vesicle trafficking. Valid but specialized function, not core to CALM1 primary
      role.
    supported_by:
    - reference_id: PMID:11984006
      supporting_text: The Chediak-Higashi protein interacts with SNARE complex and
        signal transduction proteins
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:19855925
  review:
    summary: Binding to myelin basic protein - relevant for myelin sheath localization.
    action: KEEP_AS_NON_CORE
    reason: IPI evidence (PMID:19855925) demonstrates calmodulin-MBP complex formation.
      Relevant for nervous system function but not core ubiquitous role.
    supported_by:
    - reference_id: PMID:19855925
      supporting_text: Structural analysis of the complex between calmodulin and full-length
        myelin basic protein, an intrinsically disordered molecule
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:27564677
  review:
    summary: Binding to KCNQ/M-channels - more specific annotation available.
    action: REMOVE
    reason: Generic protein binding for KCNQ channel interaction. The voltage-gated
      potassium channel complex annotation (GO:0008076) better captures this specific
      interaction.
    supported_by:
    - reference_id: PMID:27564677
      supporting_text: Structural Insights into the M-Channel Proximal C-Terminus/Calmodulin
        Complex
- term:
    id: GO:0043539
    label: protein serine/threonine kinase activator activity
  evidence_type: IDA
  original_reference_id: PMID:35568036
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:35568036
      supporting_text: 2022 May 13. A family of conserved bacterial virulence factors
        dampens interferon responses by blocking calcium signaling.
- term:
    id: GO:0005509
    label: calcium ion binding
  evidence_type: IDA
  original_reference_id: PMID:35568036
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:35568036
      supporting_text: 2022 May 13. A family of conserved bacterial virulence factors
        dampens interferon responses by blocking calcium signaling.
- term:
    id: GO:0035458
    label: cellular response to interferon-beta
  evidence_type: IDA
  original_reference_id: PMID:35568036
  review:
    summary: CALM1 mediates interferon signaling through CaMKII and JAK/STAT pathway
      activation.
    action: ACCEPT
    reason: IDA evidence (PMID:35568036) demonstrates CALM1 role in IFN-β response
      through calcium signaling to CaMKII and JAK/STAT. Bacterial pathogens target
      this pathway by sequestering calmodulin.
    supported_by:
    - reference_id: PMID:35568036
      supporting_text: IFN inhibition was mediated by the binding of OspC1 and OspC3
        to the Ca2+ sensor calmodulin (CaM), blocking CaM kinase II and downstream
        JAK/STAT signaling
- term:
    id: GO:0043539
    label: protein serine/threonine kinase activator activity
  evidence_type: IDA
  original_reference_id: PMID:14722083
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:14722083
      supporting_text: 2004 Jan 12. Comparative analyses of the three-dimensional
        structures and enzymatic properties of alpha, beta, gamma and delta isoforms
        of Ca2+-calmodulin-dependent protein kinase II.
- term:
    id: GO:0046427
    label: positive regulation of receptor signaling pathway via JAK-STAT
  evidence_type: IDA
  original_reference_id: PMID:11972023
  review:
    summary: CALM1/CaMKII required for STAT1 phosphorylation in interferon response.
    action: ACCEPT
    reason: IDA evidence shows calcium/calmodulin and CaMKII are required for IFN-γ-induced
      STAT1 Ser-727 phosphorylation. Important for immune signaling.
    supported_by:
    - reference_id: PMID:11972023
      supporting_text: Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphorylation
        in response to IFN-gamma
- term:
    id: GO:0046427
    label: positive regulation of receptor signaling pathway via JAK-STAT
  evidence_type: IDA
  original_reference_id: PMID:35568036
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:35568036
      supporting_text: 2022 May 13. A family of conserved bacterial virulence factors
        dampens interferon responses by blocking calcium signaling.
- term:
    id: GO:0071346
    label: cellular response to type II interferon
  evidence_type: IDA
  original_reference_id: PMID:11972023
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:11972023
      supporting_text: Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphorylation
        in response to IFN-gamma.
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:28890335
  review:
    summary: EPG-3/VMP1 interaction for autophagy - more specific annotations present.
    action: REMOVE
    reason: Generic protein binding redundant with more specific autophagosome and
      organelle tethering annotations from same paper that better describe the functional
      interaction.
    supported_by:
    - reference_id: PMID:28890335
      supporting_text: The ER-Localized Transmembrane Protein EPG-3/VMP1 Regulates
        SERCA Activity
- term:
    id: GO:0016240
    label: autophagosome membrane docking
  evidence_type: IDA
  original_reference_id: PMID:28890335
  review:
    summary: CALM1 involved in ER-autophagosome contacts through EPG-3/VMP1 regulation.
    action: KEEP_AS_NON_CORE
    reason: IDA evidence (PMID:28890335) shows role in autophagy regulation through
      SERCA/calcium signaling. Valid but specialized function, not core to CALM1 primary
      role as calcium sensor.
    supported_by:
    - reference_id: PMID:28890335
      supporting_text: The ER-Localized Transmembrane Protein EPG-3/VMP1 Regulates
        SERCA Activity to Control ER-Isolation Membrane Contacts for Autophagosome
        Formation
- term:
    id: GO:0140056
    label: organelle localization by membrane tethering
  evidence_type: IDA
  original_reference_id: PMID:28890335
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:28890335
      supporting_text: Epub 2017 Sep 7. The ER-Localized Transmembrane Protein EPG-3/VMP1
        Regulates SERCA Activity to Control ER-Isolation Membrane Contacts for Autophagosome
        Formation.
- term:
    id: GO:1990456
    label: mitochondrion-endoplasmic reticulum membrane tethering
  evidence_type: IDA
  original_reference_id: PMID:28890335
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:28890335
      supporting_text: Epub 2017 Sep 7. The ER-Localized Transmembrane Protein EPG-3/VMP1
        Regulates SERCA Activity to Control ER-Isolation Membrane Contacts for Autophagosome
        Formation.
- term:
    id: GO:0005509
    label: calcium ion binding
  evidence_type: IDA
  original_reference_id: PMID:31454269
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:31454269
      supporting_text: Genetic Mosaicism in Calmodulinopathy.
- term:
    id: GO:0098901
    label: regulation of cardiac muscle cell action potential
  evidence_type: IMP
  original_reference_id: PMID:31454269
  review:
    summary: Core cardiac function - CALM1 mutations disrupt action potential regulation
      causing arrhythmias.
    action: ACCEPT
    reason: IMP evidence (PMID:31454269) from genetic mosaicism study shows CALM1
      mutations directly affect cardiac action potentials. Essential for normal cardiac
      electrophysiology.
    supported_by:
    - reference_id: PMID:31454269
      supporting_text: Genetic Mosaicism in Calmodulinopathy
- term:
    id: GO:1901842
    label: negative regulation of high voltage-gated calcium channel activity
  evidence_type: IMP
  original_reference_id: PMID:31454269
  review:
    summary: Important calcium channel regulation - CALM1 negatively regulates L-type
      calcium channels.
    action: ACCEPT
    reason: IMP evidence (PMID:31454269) demonstrates CALM1 regulation of high voltage-gated
      calcium channels. Mutations disrupt this regulation contributing to calmodulinopathies.
    supported_by:
    - reference_id: PMID:31454269
      supporting_text: Genetic Mosaicism in Calmodulinopathy
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:30021165
  review:
    summary: KIF1A motor protein interaction for vesicle transport.
    action: KEEP_AS_NON_CORE
    reason: IPI evidence (PMID:30021165) shows CALM1 regulates KIF1A-driven dense
      core vesicle transport. Specialized neuronal function for neurosecretion.
    supported_by:
    - reference_id: PMID:30021165
      supporting_text: 'Regulation of KIF1A-Driven Dense Core Vesicle Transport: Ca(2+)/CaM
        Controls DCV Binding and Liprin-α/TANC2 Recruits DCVs to Postsynaptic Sites'
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:30287853
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:30287853
      supporting_text: Calcineurin B homologous protein 3 binds with high affinity
        to the CHP binding domain of the human sodium/proton exchanger NHE1.
- term:
    id: GO:0010856
    label: adenylate cyclase activator activity
  evidence_type: IDA
  original_reference_id: PMID:11807546
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:11807546
      supporting_text: Structural basis for the activation of anthrax adenylyl cyclase
        exotoxin by calmodulin.
- term:
    id: GO:0034704
    label: calcium channel complex
  evidence_type: IDA
  original_reference_id: PMID:23040497
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:23040497
      supporting_text: Mutations in calmodulin cause ventricular tachycardia and sudden
        cardiac death.
- term:
    id: GO:0000922
    label: spindle pole
  evidence_type: IDA
  original_reference_id: PMID:16760425
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:16760425
      supporting_text: Jun 7. CP110 cooperates with two calcium-binding proteins to
        regulate cytokinesis and genome stability.
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:10692436
  review:
    summary: Binding to erythrocyte protein 4.1 for membrane-cytoskeleton linkage.
    action: KEEP_AS_NON_CORE
    reason: IPI evidence (PMID:10692436) shows calcium-dependent and independent binding
      to protein 4.1. Specialized erythrocyte function for membrane-cytoskeleton regulation.
    supported_by:
    - reference_id: PMID:10692436
      supporting_text: Ca(2+)-dependent and Ca(2+)-independent calmodulin binding
        sites in erythrocyte protein 4.1
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:15140941
  review:
    summary: Binding to Ca2+-binding protein-1/CaBP1 and Cav1.2 channels.
    action: MODIFY
    reason: While interaction is valid, this relates to calcium channel regulation
      already covered by GO:0005246 and GO:0034704. Generic protein binding uninformative.
    proposed_replacement_terms:
    - id: GO:0005246
      label: calcium channel regulator activity
    supported_by:
    - reference_id: PMID:15140941
      supporting_text: Ca2+-binding protein-1 facilitates and forms a postsynaptic
        complex with Cav1.2 (L-type) Ca2+ channels
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:15632291
  review:
    summary: Binding to HIV Nef protein - pathogen interaction.
    action: KEEP_AS_NON_CORE
    reason: IPI evidence (PMID:15632291) shows interaction with HIV Nef myristoyl
      moiety. Example of pathogen hijacking CALM1 but not core function.
    supported_by:
    - reference_id: PMID:15632291
      supporting_text: Myristoyl moiety of HIV Nef is involved in regulation of the
        interaction with calmodulin in vivo
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:16760425
  review:
    summary: CP110 binding for cytokinesis - better captured by specific annotations.
    action: REMOVE
    reason: CP110 interaction already well-covered by centrosome localization and
      cytokinesis regulation annotations. Generic protein binding redundant.
    supported_by:
    - reference_id: PMID:16760425
      supporting_text: CP110 cooperates with two calcium-binding proteins to regulate
        cytokinesis and genome stability
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:21299499
  review:
    summary: IQGAP binding for cytoskeletal regulation.
    action: KEEP_AS_NON_CORE
    reason: IPI evidence (PMID:21299499) shows IQ-motif binding to IQGAP2/3. Important
      for cytoskeletal regulation but not core universal function.
    supported_by:
    - reference_id: PMID:21299499
      supporting_text: 'IQ-motif selectivity in human IQGAP2 and IQGAP3: binding of
        calmodulin and myosin essential light chain'
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:3111527
  review:
    summary: Interaction with tau proteins and melittin.
    action: KEEP_AS_NON_CORE
    reason: IPI evidence (PMID:3111527) shows interaction with tau proteins. Relevant
      for neurodegeneration but not core function.
    supported_by:
    - reference_id: PMID:3111527
      supporting_text: 'Comparison of S100b protein with calmodulin: interactions
        with melittin and microtubule-associated tau proteins'
- term:
    id: GO:0005634
    label: nucleus
  evidence_type: HDA
  original_reference_id: PMID:21630459
  review:
    summary: Sperm nuclear localization from proteomics.
    action: KEEP_AS_NON_CORE
    reason: HDA evidence from sperm nucleus proteomics. Specialized reproductive cell
      localization, not core.
    supported_by:
    - reference_id: PMID:21630459
      supporting_text: Proteomic characterization of the human sperm nucleus
- term:
    id: GO:0005737
    label: cytoplasm
  evidence_type: TAS
  original_reference_id: PMID:10899953
  review:
    summary: Core cytoplasmic localization with TAS evidence.
    action: ACCEPT
    reason: TAS evidence confirms primary cytoplasmic localization where CALM1 performs
      most functions.
    supported_by:
    - reference_id: PMID:10899953
      supporting_text: Calmodulin regulation of basal and agonist-stimulated G protein
        coupling by the mu-opioid receptor
- term:
    id: GO:0005813
    label: centrosome
  evidence_type: IDA
  original_reference_id: PMID:16760425
  review:
    summary: Direct experimental evidence for centrosomal localization.
    action: ACCEPT
    reason: IDA evidence directly demonstrates centrosomal localization and functional
      importance for cytokinesis.
    supported_by:
    - reference_id: PMID:16760425
      supporting_text: CP110 cooperates with two calcium-binding proteins to regulate
        cytokinesis and genome stability
- term:
    id: GO:0005876
    label: spindle microtubule
  evidence_type: IDA
  original_reference_id: PMID:16760425
  review:
    summary: Direct evidence for spindle microtubule localization.
    action: ACCEPT
    reason: IDA evidence confirms spindle microtubule localization essential for mitosis
      and cytokinesis.
    supported_by:
    - reference_id: PMID:16760425
      supporting_text: depletion leads to a failure at a late stage of cytokinesis
        and the formation of binucleate cells
- term:
    id: GO:0005886
    label: plasma membrane
  evidence_type: TAS
  original_reference_id: PMID:10899953
  review:
    summary: Plasma membrane localization for GPCR regulation.
    action: ACCEPT
    reason: TAS evidence shows plasma membrane localization for G protein-coupled
      receptor regulation. Important for membrane-associated signaling.
    supported_by:
    - reference_id: PMID:10899953
      supporting_text: Calmodulin regulation of basal and agonist-stimulated G protein
        coupling by the mu-opioid receptor
- term:
    id: GO:0007186
    label: G protein-coupled receptor signaling pathway
  evidence_type: TAS
  original_reference_id: PMID:10899953
  review:
    summary: CALM1 regulates GPCR signaling, particularly opioid receptors.
    action: ACCEPT
    reason: TAS evidence shows CALM1 regulation of mu-opioid receptor and GPCR signaling.
      Important signaling pathway regulation.
    supported_by:
    - reference_id: PMID:10899953
      supporting_text: Calmodulin regulation of basal and agonist-stimulated G protein
        coupling by the mu-opioid receptor
- term:
    id: GO:0021762
    label: substantia nigra development
  evidence_type: HEP
  original_reference_id: PMID:22926577
  review:
    summary: Expression in substantia nigra but not functionally validated for development.
    action: REMOVE
    reason: HEP (high-throughput expression pattern) evidence only shows CALM1 expression
      in substantia nigra from proteomic study. No functional validation for developmental
      role. Expression does not equal function.
    supported_by:
    - reference_id: PMID:22926577
      supporting_text: Quantitative proteomic analysis of human substantia nigra in
        Alzheimer's disease, Huntington's disease and Multiple sclerosis
- term:
    id: GO:0031982
    label: vesicle
  evidence_type: HDA
  original_reference_id: PMID:19190083
  review:
    summary: Presence in exosome-like vesicles from epithelium.
    action: KEEP_AS_NON_CORE
    reason: HDA evidence from exosome proteomics. Reflects vesicular trafficking role
      but not core function.
    supported_by:
    - reference_id: PMID:19190083
      supporting_text: 'Characterization of exosome-like vesicles released from human
        tracheobronchial ciliated epithelium: a possible role in innate defense'
- term:
    id: GO:0032465
    label: regulation of cytokinesis
  evidence_type: IMP
  original_reference_id: PMID:16760425
  review:
    summary: Direct functional evidence for cytokinesis regulation.
    action: ACCEPT
    reason: IMP evidence shows CALM1 depletion causes cytokinesis failure. Essential
      for proper cell division completion.
    supported_by:
    - reference_id: PMID:16760425
      supporting_text: its depletion leads to a failure at a late stage of cytokinesis
        and the formation of binucleate cells, mirroring the defects resulting from
        ablation of either CaM or centrin function
- term:
    id: GO:0005509
    label: calcium ion binding
  evidence_type: IDA
  original_reference_id: PMID:11807546
  review:
    summary: Duplicate calcium binding with anthrax toxin study evidence.
    action: ACCEPT
    reason: Core function with IDA evidence from structural study with anthrax adenylyl
      cyclase.
    supported_by:
    - reference_id: PMID:11807546
      supporting_text: Structural basis for the activation of anthrax adenylyl cyclase
        exotoxin by calmodulin
- term:
    id: GO:0032991
    label: protein-containing complex
  evidence_type: IDA
  original_reference_id: PMID:19855925
  review:
    summary: Calmodulin functions as a core component of various protein-containing
      complexes, including calcium-dependent kinase complexes and phosphatase complexes
      that are essential for calcium signaling.
    action: ACCEPT
    reason: Protein-containing complex localization is fundamental to calmodulin's
      function as a calcium sensor that regulates multiple enzymes through direct
      protein-protein interactions in multiprotein complexes.
    supported_by:
    - reference_id: PMID:19855925
      supporting_text: Structural analysis of the complex between calmodulin and full-length
        myelin basic protein
- term:
    id: GO:1902494
    label: catalytic complex
  evidence_type: IDA
  original_reference_id: PMID:11807546
  review:
    summary: Calmodulin forms catalytic complexes with adenylate cyclases in calcium-dependent
      manner to regulate cAMP signaling. This represents a core regulatory mechanism
      for calcium-dependent activation of adenylate cyclase.
    action: ACCEPT
    reason: Catalytic complex formation is central to calmodulin's function as an
      adenylate cyclase activator, enabling calcium-dependent regulation of cAMP production
      in G protein-coupled receptor signaling pathways.
    supported_by:
    - reference_id: PMID:11807546
      supporting_text: Structural basis for the activation of anthrax adenylyl cyclase
        exotoxin by calmodulin
- term:
    id: GO:0005576
    label: extracellular region
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-482772
  review:
    summary: Extracellular release from platelets.
    action: KEEP_AS_NON_CORE
    reason: TAS from Reactome showing platelet release of cytosolic components. Specialized
      platelet function, not core.
    supported_by:
    - reference_id: Reactome:R-HSA-482772
      supporting_text: Release of platelet cytosolic components
- term:
    id: GO:0005654
    label: nucleoplasm
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-111915
  review:
    summary: Nuclear localization for CAMK4 regulation.
    action: ACCEPT
    reason: Nucleoplasm is a core localization for calmodulin (CALM1), which regulates
      nuclear proteins and transcription factors. This annotation is correct regardless
      of specific pathway context.
    supported_by:
    - reference_id: Reactome:R-HSA-111915
      supporting_text: CAMK4 autophosphorylates
- term:
    id: GO:0005654
    label: nucleoplasm
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-2730867
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005654
    label: nucleoplasm
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-442749
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005654
    label: nucleoplasm
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-4551465
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005654
    label: nucleoplasm
  evidence_type: TAS
  original_reference_id: Reactome:R-NUL-9618916
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005654
    label: nucleoplasm
  evidence_type: TAS
  original_reference_id: Reactome:R-NUL-9619177
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005886
    label: plasma membrane
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-202110
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005886
    label: plasma membrane
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-202111
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005886
    label: plasma membrane
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-202129
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005886
    label: plasma membrane
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-202137
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005886
    label: plasma membrane
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-202144
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005886
    label: plasma membrane
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-5626549
  review:
    summary: Reactome pathway annotation for CALM1 in plasma membrane.
    action: ACCEPT
    reason: Plasma membrane is a core localization for calmodulin (CALM1), which regulates
      numerous membrane-associated proteins and ion channels. This annotation is correct
      regardless of specific pathway context.
    supported_by:
    - reference_id: Reactome:R-HSA-2730867
      supporting_text: Translocation of CaN:CaM:NFAT to nucleus
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-111966
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-1497784
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-1497796
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-1497810
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-1855153
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-202110
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-202111
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-202127
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-202129
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-2025890
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-2730849
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-2730867
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-2730872
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-3229181
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-4332358
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-4332359
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-4332363
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-445797
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-445813
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-451283
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-451311
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-4551451
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-4551465
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-482772
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-5672965
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-71541
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-71588
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-9618785
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-9619355
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-9619376
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-9653585
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-9654521
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-9654523
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-9654525
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-9654533
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-9865670
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-NUL-9617449
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-NUL-9619243
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-NUL-9619396
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0005829
    label: cytosol
  evidence_type: TAS
  original_reference_id: Reactome:R-NUL-9619413
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
- term:
    id: GO:0002027
    label: regulation of heart rate
  evidence_type: IMP
  original_reference_id: PMID:23040497
  review:
    summary: Duplicate with IMP evidence for core cardiac function.
    action: ACCEPT
    reason: IMP evidence from calmodulinopathy study directly demonstrates role in
      heart rate regulation. CALM1 mutations cause arrhythmias.
    supported_by:
    - reference_id: PMID:23040497
      supporting_text: Mutations in calmodulin cause ventricular tachycardia and sudden
        cardiac death
- term:
    id: GO:0005509
    label: calcium ion binding
  evidence_type: IDA
  original_reference_id: PMID:23040497
  review:
    summary: Another duplicate with IDA evidence from calmodulinopathy study.
    action: ACCEPT
    reason: Core function with direct experimental evidence from disease mutation
      study.
    supported_by:
    - reference_id: PMID:23040497
      supporting_text: Both CALM1 substitutions demonstrated compromised calcium binding
- term:
    id: GO:0005509
    label: calcium ion binding
  evidence_type: IDA
  original_reference_id: PMID:7607248
  review:
    summary: Duplicate with IDA evidence from titin kinase study.
    action: ACCEPT
    reason: Core function demonstrated in cardiac titin kinase binding study.
    supported_by:
    - reference_id: PMID:7607248
      supporting_text: A calmodulin-binding sequence in the C-terminus of human cardiac
        titin kinase
- term:
    id: GO:0005509
    label: calcium ion binding
  evidence_type: IDA
  original_reference_id: PMID:8631777
  review:
    summary: Duplicate with IDA evidence from calmodulin conformational study.
    action: ACCEPT
    reason: Core function with biochemical evidence on calcium-induced conformational
      changes.
    supported_by:
    - reference_id: PMID:8631777
      supporting_text: Blocking the Ca2+-induced conformational transitions in calmodulin
        with disulfide bonds
- term:
    id: GO:0005513
    label: detection of calcium ion
  evidence_type: IMP
  original_reference_id: PMID:23040497
  review:
    summary: Core calcium sensing with IMP evidence from disease study.
    action: ACCEPT
    reason: Functional evidence shows CALM1 mutations impair calcium sensing causing
      cardiac disease.
    supported_by:
    - reference_id: PMID:23040497
      supporting_text: Both CALM1 substitutions demonstrated compromised calcium binding,
        and p.Asn97Ser displayed an aberrant interaction with the RYR2 calmodulin-binding-domain
        peptide at low calcium concentrations
- term:
    id: GO:0010880
    label: regulation of release of sequestered calcium ion into cytosol by sarcoplasmic
      reticulum
  evidence_type: IDA
  original_reference_id: PMID:20226167
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:20226167
      supporting_text: Defective calmodulin binding to the cardiac ryanodine receptor
        plays a key role in CPVT-associated channel dysfunction.
- term:
    id: GO:0019901
    label: protein kinase binding
  evidence_type: IPI
  original_reference_id: PMID:20668654
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:20668654
      supporting_text: Structure of the CaMKIIdelta/calmodulin complex reveals the
        molecular mechanism of CaMKII kinase activation.
- term:
    id: GO:0030017
    label: sarcomere
  evidence_type: IDA
  original_reference_id: PMID:20226167
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:20226167
      supporting_text: Defective calmodulin binding to the cardiac ryanodine receptor
        plays a key role in CPVT-associated channel dysfunction.
- term:
    id: GO:0031432
    label: titin binding
  evidence_type: IPI
  original_reference_id: PMID:7607248
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:7607248
      supporting_text: A calmodulin-binding sequence in the C-terminus of human cardiac
        titin kinase.
- term:
    id: GO:0043539
    label: protein serine/threonine kinase activator activity
  evidence_type: TAS
  original_reference_id: PMID:20668654
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:20668654
      supporting_text: Structure of the CaMKIIdelta/calmodulin complex reveals the
        molecular mechanism of CaMKII kinase activation.
- term:
    id: GO:0044325
    label: transmembrane transporter binding
  evidence_type: IPI
  original_reference_id: PMID:21167176
  review:
    summary: CALM1 binds IQ motif of cardiac sodium channel NaV1.5 for regulation.
    action: ACCEPT
    reason: IPI evidence (PMID:21167176) demonstrates specific binding to sodium channel
      NaV1.5 IQ motif. Important for cardiac ion channel regulation beyond just calcium
      channels.
    supported_by:
    - reference_id: PMID:21167176
      supporting_text: Solution NMR structure of Apo-calmodulin in complex with the
        IQ motif of human cardiac sodium channel NaV1.5
- term:
    id: GO:0044325
    label: transmembrane transporter binding
  evidence_type: IPI
  original_reference_id: PMID:23040497
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:23040497
      supporting_text: Mutations in calmodulin cause ventricular tachycardia and sudden
        cardiac death.
- term:
    id: GO:0051592
    label: response to calcium ion
  evidence_type: IDA
  original_reference_id: PMID:7607248
  review:
    summary: CALM1 responds to calcium through conformational change and target binding.
    action: ACCEPT
    reason: IDA evidence shows calcium-dependent response through titin kinase binding.
      Core mechanism of CALM1 function.
    supported_by:
    - reference_id: PMID:7607248
      supporting_text: A calmodulin-binding sequence in the C-terminus of human cardiac
        titin kinase
- term:
    id: GO:0055117
    label: regulation of cardiac muscle contraction
  evidence_type: IMP
  original_reference_id: PMID:23040497
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:23040497
      supporting_text: Mutations in calmodulin cause ventricular tachycardia and sudden
        cardiac death.
- term:
    id: GO:0072542
    label: protein phosphatase activator activity
  evidence_type: IDA
  original_reference_id: PMID:8631777
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:8631777
      supporting_text: Blocking the Ca2+-induced conformational transitions in calmodulin
        with disulfide bonds.
- term:
    id: GO:0005509
    label: calcium ion binding
  evidence_type: IDA
  original_reference_id: PMID:26164367
  review:
    summary: Duplicate with IDA evidence from RyR2 arrhythmia study.
    action: ACCEPT
    reason: Core function studied in context of calmodulin mutations and RyR2-mediated
      disease.
    supported_by:
    - reference_id: PMID:26164367
      supporting_text: Distinctive malfunctions of calmodulin mutations associated
        with heart RyR2-mediated arrhythmic disease
- term:
    id: GO:0005509
    label: calcium ion binding
  evidence_type: IDA
  original_reference_id: PMID:26969752
  review:
    summary: Duplicate with IDA evidence from LQTS study.
    action: ACCEPT
    reason: Core function studied in Long QT syndrome mutations.
    supported_by:
    - reference_id: PMID:26969752
      supporting_text: Spectrum and Prevalence of CALM1-, CALM2-, and CALM3-Encoded
        Calmodulin Variants in Long QT Syndrome
- term:
    id: GO:0005509
    label: calcium ion binding
  evidence_type: IDA
  original_reference_id: PMID:27516456
  review:
    summary: Duplicate with IDA evidence from CPVT mutation study.
    action: ACCEPT
    reason: Core function studied in CPVT-associated CALM3-A103V mutation.
    supported_by:
    - reference_id: PMID:27516456
      supporting_text: Novel CPVT-Associated Calmodulin Mutation in CALM3 (CALM3-A103V)
        Activates Arrhythmogenic Ca Waves and Sparks
- term:
    id: GO:0005737
    label: cytoplasm
  evidence_type: IDA
  original_reference_id: PMID:27165696
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:27165696
      supporting_text: 2016 May 7. Arrhythmogenic calmodulin mutations impede activation
        of small-conductance calcium-activated potassium current.
- term:
    id: GO:0019855
    label: calcium channel inhibitor activity
  evidence_type: IDA
  original_reference_id: PMID:26969752
  review:
    summary: CALM1 inhibits calcium channels - mutations cause Long QT syndrome through
      loss of inhibition.
    action: ACCEPT
    reason: IDA evidence (PMID:26969752) from LQTS study shows CALM1 inhibits calcium
      channels. E141G mutation impairs this function causing LQTS. Important negative
      regulatory function.
    supported_by:
    - reference_id: PMID:26969752
      supporting_text: Spectrum and Prevalence of CALM1-, CALM2-, and CALM3-Encoded
        Calmodulin Variants in Long QT Syndrome and Functional Characterization of
        a Novel Long QT Syndrome-Associated Calmodulin Missense Variant, E141G
- term:
    id: GO:0060314
    label: regulation of ryanodine-sensitive calcium-release channel activity
  evidence_type: IDA
  original_reference_id: PMID:22067155
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:22067155
      supporting_text: Nov 1. FRET detection of calmodulin binding to the cardiac
        RyR2 calcium release channel.
- term:
    id: GO:0060315
    label: negative regulation of ryanodine-sensitive calcium-release channel activity
  evidence_type: IDA
  original_reference_id: PMID:26164367
  review:
    summary: Core cardiac function - CALM1 negatively regulates RyR2 to prevent calcium
      leak and arrhythmias.
    action: ACCEPT
    reason: IDA evidence (PMID:26164367) shows CALM1 inhibits RyR2 activity. Disease
      mutations impair this inhibition causing CPVT through excessive calcium release.
      Essential for cardiac calcium homeostasis.
    supported_by:
    - reference_id: PMID:26164367
      supporting_text: Distinctive malfunctions of calmodulin mutations associated
        with heart RyR2-mediated arrhythmic disease
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:16127172
  review:
    summary: Reactome pathway annotation - see individual pathways for specific functions
    action: ACCEPT
    reason: TAS evidence from curated Reactome pathways. These annotations reflect
      the diverse cellular processes involving CALM1.
    supported_by:
    - reference_id: PMID:16127172
      supporting_text: 2005 Aug 26. Calcium/calmodulin regulates ubiquitination of
        the ubiquitin-specific protease TRE17/USP6.
- term:
    id: GO:0005509
    label: calcium ion binding
  evidence_type: IDA
  original_reference_id: PMID:27564677
  review:
    summary: Duplicate with IDA evidence from M-channel/KCNQ study.
    action: ACCEPT
    reason: Core function demonstrated in structural study of KCNQ channel regulation.
    supported_by:
    - reference_id: PMID:27564677
      supporting_text: Structural Insights into the M-Channel Proximal C-Terminus/Calmodulin
        Complex
core_functions:
- description: Binds calcium ions through four EF-hand domains enabling conformational
    changes that regulate calcium-dependent enzymes and signaling pathways
  molecular_function:
    id: GO:0005509
    label: calcium ion binding
  directly_involved_in:
  - id: GO:0005513
    label: detection of calcium ion
  - id: GO:0097720
    label: calcineurin-mediated signaling
  locations:
  - id: GO:0005737
    label: cytoplasm
  - id: GO:0005886
    label: plasma membrane
  supported_by:
  - reference_id: PMID:23040497
    supporting_text: Both CALM1 substitutions demonstrated compromised calcium binding
  - reference_id: PMID:31454269
    supporting_text: Calmodulin mutations are associated with a diversity of heart
      rhythm disorders, including LQTS, CPVT, idiopathic ventricular tachycardia,
      and sudden death
- description: Activates protein serine/threonine kinases including CaMKII in calcium-dependent
    manner
  molecular_function:
    id: GO:0043539
    label: protein serine/threonine kinase activator activity
  directly_involved_in:
  - id: GO:0046427
    label: positive regulation of receptor signaling pathway via JAK-STAT
  - id: GO:0035458
    label: cellular response to interferon-beta
  - id: GO:0060291
    label: long-term synaptic potentiation
  locations:
  - id: GO:0005737
    label: cytoplasm
  supported_by:
  - reference_id: PMID:35568036
    supporting_text: A family of conserved bacterial virulence factors dampens interferon
      responses by blocking calcium signaling
  - reference_id: PMID:14722083
    supporting_text: Comparative analyses of the three-dimensional structures and
      enzymatic properties of alpha, beta, gamma and delta isoforms of Ca2+-calmodulin-dependent
      protein kinase II
- description: Activates calcineurin phosphatase in calcium-dependent manner to dephosphorylate
    substrates including NFAT transcription factors
  molecular_function:
    id: GO:0072542
    label: protein phosphatase activator activity
  directly_involved_in:
  - id: GO:0097720
    label: calcineurin-mediated signaling
  locations:
  - id: GO:0005737
    label: cytoplasm
  - id: GO:0005829
    label: cytosol
  supported_by:
  - reference_id: PMID:8631777
    supporting_text: Blocking the Ca2+-induced conformational transitions in calmodulin
      with disulfide bonds
- description: Regulates cardiac and skeletal muscle calcium channels including ryanodine
    receptor RyR2 and L-type calcium channels to control calcium release and excitation-contraction
    coupling
  molecular_function:
    id: GO:0005246
    label: calcium channel regulator activity
  directly_involved_in:
  - id: GO:0010880
    label: regulation of release of sequestered calcium ion into cytosol by sarcoplasmic
      reticulum
  - id: GO:0010881
    label: regulation of cardiac muscle contraction by regulation of the release of
      sequestered calcium ion
  - id: GO:1901844
    label: regulation of cell communication by electrical coupling involved in cardiac
      conduction
  - id: GO:0002027
    label: regulation of heart rate
  locations:
  - id: GO:0030017
    label: sarcomere
  anatomical_locations:
  - id: UBERON:0000948
    label: heart
  - id: UBERON:0001134
    label: skeletal muscle tissue
  supported_by:
  - reference_id: PMID:20226167
    supporting_text: Defective calmodulin binding to the cardiac ryanodine receptor
      plays a key role in CPVT-associated channel dysfunction
  - reference_id: PMID:23040497
    supporting_text: Mutations in calmodulin cause ventricular tachycardia and sudden
      cardiac death
  in_complex:
    id: GO:0034704
    label: calcium channel complex
- description: Activates adenylate cyclase in calcium-dependent manner for cAMP signaling
  molecular_function:
    id: GO:0010856
    label: adenylate cyclase activator activity
  directly_involved_in:
  - id: GO:0007186
    label: G protein-coupled receptor signaling pathway
  locations:
  - id: GO:0005737
    label: cytoplasm
  supported_by:
  - reference_id: PMID:11807546
    supporting_text: Structural basis for the activation of anthrax adenylyl cyclase
      exotoxin by calmodulin
  in_complex:
    id: GO:1902494
    label: catalytic complex
- description: Regulates cytokinesis through calcium-dependent interaction with centrosomal
    protein CP110
  molecular_function:
    id: GO:0048306
    label: calcium-dependent protein binding
  directly_involved_in:
  - id: GO:0032465
    label: regulation of cytokinesis
  - id: GO:0000086
    label: G2/M transition of mitotic cell cycle
  locations:
  - id: GO:0005813
    label: centrosome
  - id: GO:0000922
    label: spindle pole
  - id: GO:0005876
    label: spindle microtubule
  supported_by:
  - reference_id: PMID:16760425
    supporting_text: CP110 cooperates with two calcium-binding proteins to regulate
      cytokinesis and genome stability
references:
- 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:0000107
  title: Automatic transfer of experimentally verified manual GO annotation data to
    orthologs using Ensembl Compara.
  findings: []
- id: GO_REF:0000117
  title: Electronic Gene Ontology annotations created by ARBA machine learning models
  findings: []
- id: GO_REF:0000120
  title: Combined Automated Annotation using Multiple IEA Methods.
  findings: []
- id: PMID:10692436
  title: Ca(2+)-dependent and Ca(2+)-independent calmodulin binding sites in erythrocyte
    protein 4.1. Implications for regulation of protein 4.1 interactions with transmembrane
    proteins.
  findings: []
- id: PMID:10899953
  title: Calmodulin regulation of basal and agonist-stimulated G protein coupling
    by the mu-opioid receptor (OP(3)) in morphine-pretreated cell.
  findings: []
- id: PMID:11807546
  title: Structural basis for the activation of anthrax adenylyl cyclase exotoxin
    by calmodulin.
  findings: []
- id: PMID:11972023
  title: Requirement of Ca2+ and CaMKII for Stat1 Ser-727 phosphorylation in response
    to IFN-gamma.
  findings: []
- id: PMID:11984006
  title: The Chediak-Higashi protein interacts with SNARE complex and signal transduction
    proteins.
  findings: []
- id: PMID:14722083
  title: Comparative analyses of the three-dimensional structures and enzymatic properties
    of alpha, beta, gamma and delta isoforms of Ca2+-calmodulin-dependent protein
    kinase II.
  findings: []
- id: PMID:15140941
  title: Ca2+-binding protein-1 facilitates and forms a postsynaptic complex with
    Cav1.2 (L-type) Ca2+ channels.
  findings: []
- id: PMID:15632291
  title: Myristoyl moiety of HIV Nef is involved in regulation of the interaction
    with calmodulin in vivo.
  findings: []
- id: PMID:16127172
  title: Calcium/calmodulin regulates ubiquitination of the ubiquitin-specific protease
    TRE17/USP6.
  findings: []
- id: PMID:16760425
  title: CP110 cooperates with two calcium-binding proteins to regulate cytokinesis
    and genome stability.
  findings: []
- id: PMID:19190083
  title: 'Characterization of exosome-like vesicles released from human tracheobronchial
    ciliated epithelium: a possible role in innate defense.'
  findings: []
- id: PMID:19855925
  title: Structural analysis of the complex between calmodulin and full-length myelin
    basic protein, an intrinsically disordered molecule.
  findings: []
- id: PMID:20226167
  title: Defective calmodulin binding to the cardiac ryanodine receptor plays a key
    role in CPVT-associated channel dysfunction.
  findings: []
- id: PMID:20668654
  title: Structure of the CaMKIIdelta/calmodulin complex reveals the molecular mechanism
    of CaMKII kinase activation.
  findings: []
- id: PMID:21167176
  title: Solution NMR structure of Apo-calmodulin in complex with the IQ motif of
    human cardiac sodium channel NaV1.5.
  findings: []
- id: PMID:21299499
  title: 'IQ-motif selectivity in human IQGAP2 and IQGAP3: binding of calmodulin and
    myosin essential light chain.'
  findings: []
- id: PMID:21630459
  title: Proteomic characterization of the human sperm nucleus.
  findings: []
- id: PMID:22067155
  title: FRET detection of calmodulin binding to the cardiac RyR2 calcium release
    channel.
  findings: []
- id: PMID:22926577
  title: Quantitative proteomic analysis of human substantia nigra in Alzheimer's
    disease, Huntington's disease and Multiple sclerosis.
  findings: []
- id: PMID:23040497
  title: Mutations in calmodulin cause ventricular tachycardia and sudden cardiac
    death.
  findings: []
- id: PMID:26164367
  title: Distinctive malfunctions of calmodulin mutations associated with heart RyR2-mediated
    arrhythmic disease.
  findings: []
- id: PMID:26969752
  title: Spectrum and Prevalence of CALM1-, CALM2-, and CALM3-Encoded Calmodulin Variants
    in Long QT Syndrome and Functional Characterization of a Novel Long QT Syndrome-Associated
    Calmodulin Missense Variant, E141G.
  findings: []
- id: PMID:27165696
  title: Arrhythmogenic calmodulin mutations impede activation of small-conductance
    calcium-activated potassium current.
  findings: []
- id: PMID:27516456
  title: Novel CPVT-Associated Calmodulin Mutation in CALM3 (CALM3-A103V) Activates
    Arrhythmogenic Ca Waves and Sparks.
  findings: []
- id: PMID:27564677
  title: Structural Insights into the M-Channel Proximal C-Terminus/Calmodulin Complex.
  findings: []
- id: PMID:28890335
  title: The ER-Localized Transmembrane Protein EPG-3/VMP1 Regulates SERCA Activity
    to Control ER-Isolation Membrane Contacts for Autophagosome Formation.
  findings: []
- id: PMID:30021165
  title: 'Regulation of KIF1A-Driven Dense Core Vesicle Transport: Ca(2+)/CaM Controls
    DCV Binding and Liprin-α/TANC2 Recruits DCVs to Postsynaptic Sites.'
  findings: []
- id: PMID:30287853
  title: Calcineurin B homologous protein 3 binds with high affinity to the CHP binding
    domain of the human sodium/proton exchanger NHE1.
  findings: []
- id: PMID:30842726
  title: An IQSEC2 Mutation Associated With Intellectual Disability and Autism Results
    in Decreased Surface AMPA Receptors.
  findings: []
- id: PMID:3111527
  title: 'Comparison of S100b protein with calmodulin: interactions with melittin
    and microtubule-associated tau proteins and inhibition of phosphorylation of tau
    proteins by protein kinase C.'
  findings: []
- id: PMID:31454269
  title: Genetic Mosaicism in Calmodulinopathy.
  findings: []
- id: PMID:31983428
  title: Interaction between IDH1 WT and calmodulin and its implications for glioblastoma
    cell growth and migration.
  findings: []
- id: PMID:35271311
  title: 'OpenCell: Endogenous tagging for the cartography of human cellular organization.'
  findings: []
- id: PMID:35568036
  title: A family of conserved bacterial virulence factors dampens interferon responses
    by blocking calcium signaling.
  findings: []
- id: PMID:7607248
  title: A calmodulin-binding sequence in the C-terminus of human cardiac titin kinase.
  findings: []
- id: PMID:8631777
  title: Blocking the Ca2+-induced conformational transitions in calmodulin with disulfide
    bonds.
  findings: []
- id: Reactome:R-HSA-111915
  title: CAMK4 autophosphorylates
  findings: []
- id: Reactome:R-HSA-111966
  title: GRK2 binds CALM1:4Ca2+
  findings: []
- id: Reactome:R-HSA-1497784
  title: The cofactor BH4 is required for electron transfer in the eNOS catalytic
    cycle
  findings: []
- id: Reactome:R-HSA-1497796
  title: BH2 binding can lead to eNOS uncoupling
  findings: []
- id: Reactome:R-HSA-1497810
  title: Uncoupled eNOS favours the formation of superoxide
  findings: []
- id: Reactome:R-HSA-1855153
  title: I(1,4,5)P3 is phosphorylated to I(1,3,4,5)P4 by ITPKA/B/C in the cytosol
  findings: []
- id: Reactome:R-HSA-202110
  title: eNOS:Caveolin-1 complex binds to CaM
  findings: []
- id: Reactome:R-HSA-202111
  title: AKT1 phosphorylates eNOS
  findings: []
- id: Reactome:R-HSA-202127
  title: eNOS synthesizes NO
  findings: []
- id: Reactome:R-HSA-202129
  title: HSP90 binds eNOS:Caveolin-1:CaM complex
  findings: []
- id: Reactome:R-HSA-202137
  title: AKT1 binds eNOS complex via HSP90
  findings: []
- id: Reactome:R-HSA-202144
  title: Caveolin-1 dissociates from eNOS:CaM:HSP90 complex
  findings: []
- id: Reactome:R-HSA-2025890
  title: Calcineurin binds NFATC1,2,3
  findings: []
- id: Reactome:R-HSA-2730849
  title: Calcineurin binds and dephosphorylates NFAT
  findings: []
- id: Reactome:R-HSA-2730867
  title: Translocation of CaN:CaM:NFAT to nucleus
  findings: []
- id: Reactome:R-HSA-2730872
  title: Activation of Calcineurin
  findings: []
- id: Reactome:R-HSA-3229181
  title: CALM1:Ca2+ binds CNG channel
  findings: []
- id: Reactome:R-HSA-4332358
  title: Dissociation of CaM and CAMK2 autophosphorylation
  findings: []
- id: Reactome:R-HSA-4332359
  title: Active calmodulin binds CAMK2
  findings: []
- id: Reactome:R-HSA-4332363
  title: Autophosphorylation and activation of CAMK2
  findings: []
- id: Reactome:R-HSA-442749
  title: CaMKK autophosphorylates in the nucleus
  findings: []
- id: Reactome:R-HSA-445797
  title: MYLK (MLCK) Active Calmodulin Binding
  findings: []
- id: Reactome:R-HSA-445813
  title: Phosphorylation of Smooth Muscle Myosin Light Chains
  findings: []
- id: Reactome:R-HSA-451283
  title: kainate receptor binds glutamate
  findings: []
- id: Reactome:R-HSA-451311
  title: Activation of Ca-permeable Kainate receptors
  findings: []
- id: Reactome:R-HSA-4551451
  title: Calcineurin binds and dephosphorylates NFAT1 in response to WNT/Ca2+ signaling
  findings: []
- id: Reactome:R-HSA-4551465
  title: Translocation of NFATC1:CaN:CaM to nucleus
  findings: []
- id: Reactome:R-HSA-482772
  title: Release of platelet cytosolic components
  findings: []
- id: Reactome:R-HSA-5626549
  title: IQGAPs bind CALM1
  findings: []
- id: Reactome:R-HSA-5672965
  title: RAS GEFs promote RAS nucleotide exchange
  findings: []
- id: Reactome:R-HSA-6786205
  title: KAMKMT transfers 3xCH3 groups from 3xAdoMet to CALM1
  findings: []
- id: Reactome:R-HSA-71541
  title: glycogen phosphorylase (PYGM) dimer b + 2 ATP => glycogen phosphorylase (PYGM)
    dimer a + 2 ADP
  findings: []
- id: Reactome:R-HSA-71588
  title: glycogen phosphorylase (PYGL) dimer b + 2 ATP => glycogen phosphorylase (PYGL)
    dimer a + 2 ADP
  findings: []
- id: Reactome:R-HSA-9618785
  title: Calmodulin binds neurogranin
  findings: []
- id: Reactome:R-HSA-9619355
  title: CaMKK autophosphorylates in the cytosol
  findings: []
- id: Reactome:R-HSA-9619376
  title: CAMK1 binds calmodulin
  findings: []
- id: Reactome:R-HSA-9653585
  title: S-Farn-Me KRAS4B binds calmodulin
  findings: []
- id: Reactome:R-HSA-9654521
  title: Calmodulin dissociates KRAS4B from the plasma membrane
  findings: []
- id: Reactome:R-HSA-9654523
  title: ARL2:GTP bind PDE6D on KRAS4B
  findings: []
- id: Reactome:R-HSA-9654525
  title: PDE6D binds S-Farn-Me KRAS4B:CALM:4 Ca2+
  findings: []
- id: Reactome:R-HSA-9654533
  title: KRAS4B recycles to the plasma membrane
  findings: []
- id: Reactome:R-HSA-9865670
  title: TRPV4 tetramer binds CALM1:Ca2+ (calmodulin:Ca2+)
  findings: []
- id: Reactome:R-NUL-9617449
  title: Rasgrf1 promotes activation of HRAS
  findings: []
- id: Reactome:R-NUL-9618916
  title: Camkk1 binds activated calmodulin in the nucleus
  findings: []
- id: Reactome:R-NUL-9619177
  title: Camkk2 phosphorylates CAMK4
  findings: []
- id: Reactome:R-NUL-9619243
  title: Camkk1 binds activated calmodulin in the cytosol
  findings: []
- id: Reactome:R-NUL-9619396
  title: CAMKK1 phosphorylates CAMK1
  findings: []
- id: Reactome:R-NUL-9619413
  title: CAMKK2 phosphorylates Camk1
  findings: []
- id: file:human/CALM1/CALM1-deep-research-falcon.md
  title: Deep research on CALM1 function
  findings: []
status: COMPLETE