Annotations: 7BYN

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
E [auth B]	EF-hand_7_8	e7bynB1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
E [auth B]	EF-hand_7_5	e7bynB2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_5	ECOD (1.6)
F [auth D]	EF-hand_7_8	e7bynD2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
F [auth D]	EF-hand_7_5	e7bynD1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_5	ECOD (1.6)
G [auth F]	EF-hand_7_8	e7bynF2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
G [auth F]	EF-hand_7_5	e7bynF1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_5	ECOD (1.6)
H	EF-hand_7_8	e7bynH2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
H	EF-hand_7_5	e7bynH1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_5	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B [auth C], C [auth E], D [auth G]	PF07885	Ion channel (Ion_trans_2)	Ion channel	-	Family
A, B [auth C], C [auth E], D [auth G]	PF00520	Ion transport protein (Ion_trans)	Ion transport protein	-	Family
E [auth B], F [auth D], G [auth F], H	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
A, B [auth C], C [auth E], D [auth G]	Green fluorescent protein,Potassium voltage-gated channel subfamily KQT member 4	monoatomic cation transmembrane transporter activity potassium ion transmembrane transporter activity monoatomic ion channel activity potassium channel activity monoatomic cation channel activity passive transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity channel activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity gated channel activity monoatomic cation transmembrane transporter activity potassium ion transmembrane transporter activity monoatomic ion channel activity potassium channel activity monoatomic cation channel activity passive transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity channel activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity gated channel activity voltage-gated channel activity voltage-gated monoatomic ion channel activity voltage-gated monoatomic cation channel activity voltage-gated potassium channel activity	bioluminescence metabolic process cellular process generation of precursor metabolites and energy localization transport monoatomic ion transport potassium ion transport monoatomic cation transport establishment of localization metal ion transport monoatomic ion transmembrane transport potassium ion transmembrane transport inorganic ion transmembrane transport bioluminescence metabolic process cellular process generation of precursor metabolites and energy localization transport monoatomic ion transport potassium ion transport monoatomic cation transport establishment of localization metal ion transport monoatomic ion transmembrane transport potassium ion transmembrane transport inorganic ion transmembrane transport inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport developmental process ear morphogenesis embryonic organ morphogenesis multicellular organismal process ear development sensory organ development animal organ development embryonic morphogenesis embryo development multicellular organism development anatomical structure morphogenesis sensory organ morphogenesis inner ear development inner ear morphogenesis anatomical structure development animal organ morphogenesis embryonic organ development system process sensory perception nervous system process sensory perception of sound sensory perception of mechanical stimulus	cell periphery cellular anatomical structure plasma membrane membrane basal part of cell basal plasma membrane plasma membrane region voltage-gated potassium channel complex protein-containing complex plasma membrane protein complex potassium channel complex membrane protein complex cation channel complex transporter complex cell periphery cellular anatomical structure plasma membrane membrane basal part of cell basal plasma membrane plasma membrane region voltage-gated potassium channel complex protein-containing complex plasma membrane protein complex potassium channel complex membrane protein complex cation channel complex transporter complex transmembrane transporter complex monoatomic ion channel complex
E [auth B], F [auth D], G [auth F], H	Calmodulin-3	cytoskeletal protein binding titin binding protein binding binding enzyme regulator activity protein phosphatase activator activity enzyme activator activity phosphatase activator activity molecular function activator activity phosphatase regulator activity molecular function regulator activity protein phosphatase regulator activity enzyme binding adenylate cyclase binding cytoskeletal protein binding titin binding protein binding binding enzyme regulator activity protein phosphatase activator activity enzyme activator activity phosphatase activator activity molecular function activator activity phosphatase regulator activity molecular function regulator activity protein phosphatase regulator activity enzyme binding adenylate cyclase binding cyclase regulator activity cyclase activator activity adenylate cyclase regulator activity adenylate cyclase activator activity protein serine/threonine kinase activator activity kinase activator activity protein kinase activator activity protein kinase regulator activity kinase regulator activity cation binding ion binding calcium ion binding metal ion binding small molecule binding transmembrane transporter binding kinase binding protein kinase binding calcium-dependent protein binding	heart process multicellular organismal process system process regulation of biological process regulation of heart contraction regulation of system process biological regulation circulatory system process regulation of blood circulation regulation of multicellular organismal process regulation of biological quality heart contraction blood circulation regulation of heart rate heart process multicellular organismal process system process regulation of biological process regulation of heart contraction regulation of system process biological regulation circulatory system process regulation of blood circulation regulation of multicellular organismal process regulation of biological quality heart contraction blood circulation regulation of heart rate regulation of calcium ion transmembrane transporter activity regulation of calcium ion transport regulation of localization regulation of cellular process negative regulation of ion transmembrane transporter activity negative regulation of calcium ion transmembrane transporter activity intracellular calcium ion homeostasis negative regulation of biological process negative regulation of ryanodine-sensitive calcium-release channel activity negative regulation of transport calcium ion transport localization negative regulation of cation transmembrane transport monoatomic cation homeostasis monoatomic cation transport intracellular monoatomic ion homeostasis regulation of release of sequestered calcium ion into cytosol regulation of monoatomic ion transport inorganic ion transmembrane transport establishment of localization regulation of cation channel activity inorganic cation transmembrane transport maintenance of location transmembrane transport regulation of molecular function release of sequestered calcium ion into cytosol regulation of transmembrane transport chemical homeostasis negative regulation of calcium ion transmembrane transport cellular localization inorganic ion homeostasis transport negative regulation of cation channel activity homeostatic process monoatomic ion transmembrane transport negative regulation of monoatomic ion transport positive regulation of biological process regulation of transmembrane transporter activity calcium ion homeostasis regulation of monoatomic ion transmembrane transport negative regulation of sequestering of calcium ion metal ion transport negative regulation of transmembrane transport regulation of transporter activity maintenance of location in cell regulation of calcium ion transmembrane transport monoatomic cation transmembrane transport positive regulation of sequestering of calcium ion negative regulation of monoatomic ion transmembrane transport negative regulation of release of sequestered calcium ion into cytosol intracellular monoatomic cation homeostasis negative regulation of cellular process monoatomic ion homeostasis monoatomic ion transport intracellular chemical homeostasis regulation of metal ion transport regulation of sequestering of calcium ion positive regulation of cellular process regulation of monoatomic ion transmembrane transporter activity calcium ion transmembrane import into cytosol regulation of transport sequestering of calcium ion negative regulation of transporter activity negative regulation of molecular function negative regulation of calcium ion transport cellular homeostasis regulation of ryanodine-sensitive calcium-release channel activity cellular process regulation of monoatomic cation transmembrane transport calcium ion transmembrane transport response to stimulus response to metal ion response to chemical response to calcium ion sarcoplasmic reticulum calcium ion transport release of sequestered calcium ion into cytosol by sarcoplasmic reticulum release of sequestered calcium ion into cytosol by endoplasmic reticulum regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum negative regulation of voltage-gated calcium channel activity regulation of voltage-gated calcium channel activity negative regulation of high voltage-gated calcium channel activity regulation of high voltage-gated calcium channel activity regulation of cytokinesis regulation of cell cycle process cytokinesis regulation of cell division cell division cell cycle regulation of cell cycle cell cycle process positive regulation of molecular function positive regulation of hydrolase activity positive regulation of cyclic-nucleotide phosphodiesterase activity regulation of catalytic activity regulation of hydrolase activity positive regulation of catalytic activity regulation of cyclic-nucleotide phosphodiesterase activity cellular response to stimulus cardiac muscle contraction intracellular signal transduction cell communication intracellular signaling cassette signal transduction regulation of cardiac muscle contraction muscle contraction regulation of striated muscle contraction calcium-mediated signaling regulation of muscle contraction signaling regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion striated muscle contraction regulation of cardiac muscle contraction by calcium ion signaling muscle system process regulation of muscle system process regulation of protein modification process positive regulation of phosphorylation regulation of protein phosphorylation positive regulation of protein metabolic process regulation of transferase activity positive regulation of phosphate metabolic process regulation of primary metabolic process positive regulation of protein serine/threonine kinase activity positive regulation of metabolic process positive regulation of protein modification process regulation of phosphate metabolic process phosphate-containing compound metabolic process positive regulation of macromolecule metabolic process protein metabolic process positive regulation of protein kinase activity phosphorus metabolic process protein modification process positive regulation of protein phosphorylation protein phosphorylation positive regulation of transferase activity positive regulation of phosphorus metabolic process phosphorylation regulation of protein metabolic process primary metabolic process regulation of protein kinase activity regulation of macromolecule metabolic process positive regulation of kinase activity regulation of kinase activity macromolecule modification regulation of protein serine/threonine kinase activity regulation of phosphorylation regulation of phosphorus metabolic process metabolic process macromolecule metabolic process regulation of metabolic process import into cell presynaptic endocytosis vesicle-mediated transport vesicle-mediated transport in synapse establishment of localization in cell endocytosis cell cycle G2/M phase transition mitotic cell cycle process G2/M transition of mitotic cell cycle cell cycle phase transition mitotic cell cycle mitotic cell cycle phase transition regulation of peptidyl-threonine phosphorylation negative regulation of phosphate metabolic process negative regulation of protein modification process peptidyl-amino acid modification peptidyl-threonine modification negative regulation of protein metabolic process negative regulation of macromolecule metabolic process negative regulation of metabolic process negative regulation of protein phosphorylation negative regulation of peptidyl-threonine phosphorylation negative regulation of phosphorus metabolic process negative regulation of phosphorylation peptidyl-threonine phosphorylation positive regulation of peptidyl-threonine phosphorylation cell communication by electrical coupling involved in cardiac conduction cell communication by electrical coupling regulation of cell communication by electrical coupling involved in cardiac conduction cardiac conduction regulation of cell communication cell communication involved in cardiac conduction regulation of cell communication by electrical coupling export across plasma membrane negative regulation of calcium ion export across plasma membrane regulation of calcium ion export across plasma membrane calcium ion export across plasma membrane export from cell positive regulation of cation transmembrane transport positive regulation of calcium ion transport positive regulation of monoatomic ion transport positive regulation of monoatomic ion transmembrane transport positive regulation of cation channel activity positive regulation of calcium ion transmembrane transporter activity positive regulation of calcium ion transmembrane transport positive regulation of transmembrane transport positive regulation of release of sequestered calcium ion into cytosol positive regulation of ryanodine-sensitive calcium-release channel activity positive regulation of transport positive regulation of transporter activity positive regulation of ion transmembrane transporter activity developmental process head development animal organ development brain development nervous system development substantia nigra development multicellular organism development central nervous system development midbrain development anatomical structure development neural nucleus development system development regulation of signaling regulation of signal transduction regulation of intracellular signal transduction regulation of response to stimulus regulation of calcium-mediated signaling regulation of action potential regulation of cardiac muscle cell action potential action potential cardiac muscle cell action potential regulation of membrane potential G protein-coupled receptor signaling pathway protein autophosphorylation regulation of protein autophosphorylation positive regulation of protein autophosphorylation detection of stimulus detection of chemical stimulus detection of calcium ion	intracellular organelle cellular anatomical structure intracellular anatomical structure cytoskeleton spindle organelle membraneless organelle intracellular membraneless organelle spindle pole microtubule cytoskeleton membrane-bounded organelle cell projection sperm midpiece cilium intracellular organelle cellular anatomical structure intracellular anatomical structure cytoskeleton spindle organelle membraneless organelle intracellular membraneless organelle spindle pole microtubule cytoskeleton membrane-bounded organelle cell projection sperm midpiece cilium 9+2 motile cilium sperm flagellum motile cilium plasma membrane bounded cell projection cytoplasm protein-containing complex transmembrane transporter complex membrane membrane protein complex cation channel complex transporter complex calcium channel complex monoatomic ion channel complex axon synapse neuron projection axon terminus presynapse distal axon calyx of Held cell junction neuron projection terminus sarcomere contractile muscle fiber supramolecular fiber myofibril supramolecular polymer supramolecular complex myelin sheath vesicle centrosome microtubule organizing center cytosolic region presynaptic cytosol cytosol cell periphery plasma membrane catalytic complex voltage-gated potassium channel complex plasma membrane protein complex potassium channel complex polymeric cytoskeletal fiber spindle microtubule microtubule nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B [auth C], C [auth E], D [auth G]	IPR000786	Green fluorescent protein, GFP	Family
A, B [auth C], C [auth E], D [auth G]	IPR011584	Green fluorescent protein-related	Family
A, B [auth C], C [auth E], D [auth G]	IPR009017	Green fluorescent protein	Homologous Superfamily
A, B [auth C], C [auth E], D [auth G]	IPR005821	Ion transport domain	Domain
A, B [auth C], C [auth E], D [auth G]	IPR013821	Potassium channel, voltage dependent, KCNQ, C-terminal	Domain
A, B [auth C], C [auth E], D [auth G]	IPR003937	Potassium channel, voltage dependent, KCNQ	Family
E [auth B], F [auth D], G [auth F], H	IPR050145	Centrin/CML-like	Family
E [auth B], F [auth D], G [auth F], H	IPR002048	EF-hand domain	Domain
E [auth B], F [auth D], G [auth F], H	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
E [auth B], F [auth D], G [auth F], H	IPR011992	EF-hand domain pair	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B [auth C], C [auth E], D [auth G]	Pharos: P56696	autosomal dominant nonsyndromic deafness 2A nonsyndromic genetic deafness noise induced hearing loss Acoustic Trauma breast cancer glioblastoma malignant glioma oligodendroglioma primitive neuroectodermal tumor atypical teratoid rhabdoid tumor cystic fibrosis Lambert-Eaton myasthenic syndrome medulloblastoma osteosarcoma large cell medulloblastoma autosomal dominant nonsyndromic deafness 2A nonsyndromic genetic deafness noise induced hearing loss Acoustic Trauma breast cancer glioblastoma malignant glioma oligodendroglioma primitive neuroectodermal tumor atypical teratoid rhabdoid tumor cystic fibrosis Lambert-Eaton myasthenic syndrome medulloblastoma osteosarcoma large cell medulloblastoma multiple sclerosis
E [auth B], F [auth D], G [auth F], H	Pharos: P0DP25	catecholaminergic polymorphic ventricular tachycardia long QT syndrome subependymal giant cell astrocytoma Ventricular arrhythmia astrocytic tumor breast cancer glioblastoma malignant ependymoma oligodendroglioma Pick disease psoriasis atypical teratoid rhabdoid tumor large cell medulloblastoma malignant glioma osteosarcoma catecholaminergic polymorphic ventricular tachycardia long QT syndrome subependymal giant cell astrocytoma Ventricular arrhythmia astrocytic tumor breast cancer glioblastoma malignant ependymoma oligodendroglioma Pick disease psoriasis atypical teratoid rhabdoid tumor large cell medulloblastoma malignant glioma osteosarcoma pilocytic astrocytoma sclerosing cholangitis ulcerative colitis B-cell chronic lymphocytic leukemia Gaucher disease medulloblastoma ovarian cancer primitive neuroectodermal tumor

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B [auth C], C [auth E], D [auth G]	OPM	Transmembrane	Alpha-helical polytopic	Ion channel (VIC) superfamily	KCNQ voltage-gated potassium channel

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B [auth C], C [auth E], D [auth G]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B [auth C], C [auth E], D [auth G]	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B [auth C], C [auth E], D [auth G]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Channels: Potassium, Sodium, & Proton Ion-Selective	KCNQ4 rectifier K⁺ channel

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.