2KXW | pdb_00002kxw

Structure of the C-domain Fragment of apo Calmodulin Bound to the IQ motif of Nav1.2

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	IQ_like	e2kxwB1	A: extended segments	X: Voltage gated calcium channel IQ domain (From Topology)	H: Voltage gated calcium channel IQ domain (From Topology)	T: Voltage gated calcium channel IQ domain	F: IQ_like	ECOD (1.6)
A	EF-hand_7_8	e2kxwA1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF13499	EF-hand domain pair (EF-hand_7)	EF-hand domain pair		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	Sodium channel protein type 2 subunit alpha	passive transmembrane transporter activity gated channel activity monoatomic ion channel activity voltage-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential channel activity voltage-gated channel activity voltage-gated monoatomic ion channel activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity monoatomic cation transmembrane transporter activity voltage-gated sodium channel activity sodium channel activity sodium ion transmembrane transporter activity passive transmembrane transporter activity gated channel activity monoatomic ion channel activity voltage-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential channel activity voltage-gated channel activity voltage-gated monoatomic ion channel activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity monoatomic cation transmembrane transporter activity voltage-gated sodium channel activity sodium channel activity sodium ion transmembrane transporter activity monoatomic cation channel activity metal ion transmembrane transporter activity protein binding binding calmodulin binding LRR domain binding protein domain specific binding leucine zipper domain binding	developmental process corpus callosum development multicellular organismal process head development forebrain development animal organ development brain development nervous system development multicellular organism development central nervous system development anatomical structure development telencephalon development system development nerve development developmental process corpus callosum development multicellular organismal process head development forebrain development animal organ development brain development nervous system development multicellular organism development central nervous system development anatomical structure development telencephalon development system development nerve development cranial nerve development optic nerve development response to decreased oxygen levels cellular response to stimulus response to stimulus cellular response to oxygen levels cellular response to hypoxia cellular response to decreased oxygen levels cellular response to chemical stimulus cellular response to stress response to hypoxia response to stress response to chemical response to oxygen levels response to abiotic stimulus cellular process regulation of cellular process signaling cellular response to chemical stress intracellular signal transduction cellular response to environmental stimulus cell communication signal transduction intrinsic apoptotic signaling pathway response to osmotic stress regulation of biological process biological regulation cellular response to osmotic stress cell death apoptotic signaling pathway intrinsic apoptotic signaling pathway in response to osmotic stress cellular response to abiotic stimulus apoptotic process programmed cell death behavior system process learning or memory nervous system process cognition memory membrane depolarization during action potential membrane depolarization action potential regulation of biological quality regulation of membrane potential plasma membrane bounded cell projection organization cellular developmental process cell projection organization cell development neuron projection development axon development cellular component organization generation of neurons neurogenesis neuron differentiation cell differentiation neuron development cellular component organization or biogenesis transport monoatomic ion transmembrane transport sodium ion transmembrane transport establishment of localization metal ion transport monoatomic cation transmembrane transport transmembrane transport localization monoatomic ion transport monoatomic cation transport sodium ion transport transmission of nerve impulse neuronal action potential pallium development cerebral cortex development determination of adult lifespan neuron apoptotic process dentate gyrus development hippocampus development limbic system development myelination axon ensheathment ensheathment of neurons	cell periphery cellular anatomical structure sarcolemma plasma membrane membrane T-tubule axon cell projection paranode region of axon main axon neuron projection plasma membrane bounded cell projection node of Ranvier presynapse cell periphery cellular anatomical structure sarcolemma plasma membrane membrane T-tubule axon cell projection paranode region of axon main axon neuron projection plasma membrane bounded cell projection node of Ranvier presynapse synapse cell junction presynaptic membrane plasma membrane region synaptic membrane axon initial segment glutamatergic synapse protein-containing complex sodium channel complex voltage-gated sodium channel complex plasma membrane protein complex membrane protein complex cation channel complex transporter complex transmembrane transporter complex monoatomic ion channel complex cell-cell junction intercalated disc anchoring junction cell-cell contact zone
A	Calmodulin	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding enzyme regulator activity molecular function regulator activity	-	cellular anatomical structure intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR024583	Voltage-gated Na+ ion channel, cytoplasmic domain	Domain
B	IPR001696	Voltage gated sodium channel, alpha subunit	Family
B	IPR000048	IQ motif, EF-hand binding site	Binding Site
B	IPR010526	Sodium ion transport-associated domain	Domain
B	IPR005821	Ion transport domain	Domain
B	IPR044564	Voltage-gated sodium channel alpha subunit, inactivation gate	Domain
B	IPR043203	Voltage-gated cation channel calcium and sodium	Family
B	IPR027359	Voltage-dependent channel domain superfamily	Homologous Superfamily
A	IPR050230	Calmodulin/Myosin light chain/Troponin C-like	Family
A	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
A	IPR002048	EF-hand domain	Domain
A	IPR011992	EF-hand domain pair	Homologous Superfamily

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.