Annotations: 7W6S

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	POZ domain	8041222	3000894	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	POZ domain	8041222	3000894	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	POZ domain	8041222	3000894	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	POZ domain	8041222	3000894	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF13499	e7w6sA2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: PF13499	ECOD (1.6)
C	PF13499	e7w6sC1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: PF13499	ECOD (1.6)
E	PF13499	e7w6sE1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: PF13499	ECOD (1.6)
G	PF13499	e7w6sG1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: PF13499	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C, E, G	PF13833	EF-hand domain pair (EF-hand_8)	EF-hand domain pair	-	Domain
A, C, E, G	PF13499	EF-hand domain pair (EF-hand_7)	EF-hand domain pair	-	Domain
B, D, F, H	PF02214	BTB/POZ domain (BTB_2)	BTB/POZ domain	In voltage-gated K+ channels this domain is responsible for subfamily-specific assembly of alpha-subunits into functional tetrameric channels [1]. In KCTD1 (Swiss:Q719H9) this domain functions as a transcriptional repressor [2]. It also mediates homo ...	In voltage-gated K+ channels this domain is responsible for subfamily-specific assembly of alpha-subunits into functional tetrameric channels [1]. In KCTD1 (Swiss:Q719H9) this domain functions as a transcriptional repressor [2]. It also mediates homomultimerisation of KCTD1 and interaction of KCTD1 with the transcription factor AP-2-alpha [2-3].	Domain
B, D, F, H	PF00520	Ion transport protein (Ion_trans)	Ion transport protein	-	Family
B, D, F, H	PF11601	Shal-type voltage-gated potassium channels, N-terminal (Shal-type)	Shal-type voltage-gated potassium channels, N-terminal	This family represents the short N-terminal helical domain of Shal-type voltage-gated potassium channels. The domain interacts with Kv channel-interacting proteins to modulate cell surface expression and the function of Kv4 channels. The interaction ...	This family represents the short N-terminal helical domain of Shal-type voltage-gated potassium channels. The domain interacts with Kv channel-interacting proteins to modulate cell surface expression and the function of Kv4 channels. The interaction of the N-terminus of Shal-type protein Kv4.2 and the Kv interacting protein KChiP1 forms a structure which is like the structure between calmodulin and its target peptides when they interact. Interactions of an N terminal alpha helix in Kv4.2 and a C terminal alpha helix in KChIP1 are essential for the modulation of Kv4.2 by KChIPs [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C, E, G	Kv channel-interacting protein 2	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding 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 cation binding ion binding binding calcium ion binding metal ion binding small molecule binding 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 signal sequence binding ER retention sequence binding peptide binding protein binding transmembrane transporter binding protein-containing complex binding potassium channel regulator activity channel regulator activity ion channel regulator activity molecular function regulator activity transporter regulator activity identical protein binding	regulation of localization positive regulation of cation transmembrane transport regulation of cellular process localization positive regulation of monoatomic ion transport positive regulation of monoatomic ion transmembrane transport monoatomic cation transport regulation of potassium ion transmembrane transporter activity regulation of biological process regulation of monoatomic ion transport inorganic ion transmembrane transport regulation of potassium ion transmembrane transport positive regulation of cation channel activity establishment of localization regulation of localization positive regulation of cation transmembrane transport regulation of cellular process localization positive regulation of monoatomic ion transport positive regulation of monoatomic ion transmembrane transport monoatomic cation transport regulation of potassium ion transmembrane transporter activity regulation of biological process regulation of monoatomic ion transport inorganic ion transmembrane transport regulation of potassium ion transmembrane transport positive regulation of cation channel activity establishment of localization regulation of cation channel activity inorganic cation transmembrane transport transmembrane transport regulation of molecular function regulation of transmembrane transport potassium ion transport regulation of potassium ion transport transport monoatomic ion transmembrane transport positive regulation of biological process regulation of transmembrane transporter activity potassium ion transmembrane transport regulation of monoatomic ion transmembrane transport metal ion transport regulation of transporter activity monoatomic cation transmembrane transport positive regulation of molecular function positive regulation of transmembrane transport monoatomic ion transport regulation of metal ion transport positive regulation of cellular process regulation of monoatomic ion transmembrane transporter activity regulation of transport biological regulation positive regulation of potassium ion transport positive regulation of transport positive regulation of transporter activity positive regulation of potassium ion transmembrane transport positive regulation of ion transmembrane transporter activity positive regulation of voltage-gated potassium channel activity cellular process regulation of monoatomic cation transmembrane transport positive regulation of potassium ion transmembrane transporter activity heart process multicellular organismal process system process regulation of heart contraction regulation of system process circulatory system process regulation of blood circulation regulation of multicellular organismal process heart contraction blood circulation action potential regulation of biological quality regulation of membrane potential membrane repolarization cellular developmental process cell development cellular component organization neurogenesis multicellular organism development neuron differentiation cell differentiation anatomical structure development cellular component organization or biogenesis cell maturation system development membrane organization developmental process developmental maturation nervous system development neuronal ion channel clustering generation of neurons clustering of voltage-gated potassium channels anatomical structure maturation neuron development neuron maturation export from cell export across plasma membrane potassium ion export across plasma membrane cellular response to stimulus response to stimulus signaling signal transduction cell communication trans-synaptic signaling synaptic signaling anterograde trans-synaptic signaling cell-cell signaling chemical synaptic transmission cardiac muscle cell membrane repolarization membrane repolarization during cardiac muscle cell action potential cardiac muscle cell action potential membrane repolarization during action potential muscle contraction muscle system process positive regulation of potassium ion export across plasma membrane regulation of potassium ion export across plasma membrane detection of stimulus response to metal ion response to chemical detection of chemical stimulus detection of calcium ion response to calcium ion response to inorganic substance	voltage-gated potassium channel complex protein-containing complex plasma membrane protein complex membrane plasma membrane potassium channel complex membrane protein complex cation channel complex cellular anatomical entity transporter complex Kv4.2-KChIP2 channel complex cell periphery transmembrane transporter complex monoatomic ion channel complex voltage-gated potassium channel complex protein-containing complex plasma membrane protein complex membrane plasma membrane potassium channel complex membrane protein complex cation channel complex cellular anatomical entity transporter complex Kv4.2-KChIP2 channel complex cell periphery transmembrane transporter complex monoatomic ion channel complex somatodendritic compartment cell projection dendrite dendritic tree neuron projection plasma membrane bounded cell projection intracellular anatomical structure cytoplasm synapse cell junction
B, D, F, H	Isoform 2 of Potassium voltage-gated channel subfamily D member 3	monoatomic cation transmembrane transporter activity A-type (transient outward) potassium channel activity gated channel activity monoatomic ion channel activity potassium ion transmembrane transporter activity outward rectifier potassium channel activity voltage-gated channel activity voltage-gated monoatomic ion channel activity potassium channel activity voltage-gated monoatomic cation channel activity monoatomic cation channel activity passive transmembrane transporter activity voltage-gated potassium channel activity inorganic molecular entity transmembrane transporter activity channel activity monoatomic cation transmembrane transporter activity A-type (transient outward) potassium channel activity gated channel activity monoatomic ion channel activity potassium ion transmembrane transporter activity outward rectifier potassium channel activity voltage-gated channel activity voltage-gated monoatomic ion channel activity potassium channel activity voltage-gated monoatomic cation channel activity monoatomic cation channel activity passive transmembrane transporter activity voltage-gated potassium channel activity inorganic molecular entity transmembrane transporter activity channel activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity protein binding binding transmembrane transporter binding cation binding ion binding metal ion binding small molecule binding	cardiac muscle cell membrane repolarization membrane repolarization ventricular cardiac muscle cell membrane repolarization biological regulation regulation of biological quality regulation of membrane potential transport monoatomic ion transmembrane transport potassium ion transmembrane transport export from cell inorganic ion transmembrane transport export across plasma membrane potassium ion export across plasma membrane establishment of localization cardiac muscle cell membrane repolarization membrane repolarization ventricular cardiac muscle cell membrane repolarization biological regulation regulation of biological quality regulation of membrane potential transport monoatomic ion transmembrane transport potassium ion transmembrane transport export from cell inorganic ion transmembrane transport export across plasma membrane potassium ion export across plasma membrane establishment of localization metal ion transport inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization monoatomic ion transport potassium ion transport cellular process monoatomic cation transport heart process multicellular organismal process system process cardiac muscle cell action potential involved in contraction membrane repolarization during cardiac muscle cell action potential cardiac muscle contraction striated muscle contraction circulatory system process actin filament-based process blood circulation cardiac muscle cell contraction ventricular cardiac muscle cell action potential action potential actin filament-based movement muscle contraction muscle system process membrane repolarization during action potential membrane repolarization during ventricular cardiac muscle cell action potential cardiac muscle cell action potential actin-mediated cell contraction heart contraction cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly protein homooligomerization cellular component organization or biogenesis regulation of biological process regulation of heart contraction regulation of system process regulation of blood circulation cardiac conduction regulation of multicellular organismal process regulation of heart rate by cardiac conduction regulation of heart rate	cell periphery postsynapse postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region cellular anatomical entity synaptic membrane sarcolemma postsynaptic specialization membrane postsynaptic specialization organelle cell periphery postsynapse postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region cellular anatomical entity synaptic membrane sarcolemma postsynaptic specialization membrane postsynaptic specialization organelle GABA-ergic synapse 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 neuron spine neuron projection dendritic spine plasma membrane bounded cell projection somatodendritic compartment cell projection dendrite dendritic tree cell body neuronal cell body

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C, E, G	IPR002048	EF-hand domain	Domain
A, C, E, G	IPR011992	EF-hand domain pair	Homologous Superfamily
A, C, E, G	IPR028846	Recoverin family	Family
A, C, E, G	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
B, D, F, H	IPR021645	Shal-type voltage-gated potassium channels, N-terminal	Domain
B, D, F, H	IPR000210	BTB/POZ domain	Domain
B, D, F, H	IPR024587	Potassium channel, voltage dependent, Kv4, C-terminal	Domain
B, D, F, H	IPR003968	Potassium channel, voltage dependent, Kv	Family
B, D, F, H	IPR003975	Potassium channel, voltage dependent, Kv4	Family
B, D, F, H	IPR005821	Ion transport domain	Domain
B, D, F, H	IPR004056	Potassium channel, voltage dependent, Kv4.3	Family
B, D, F, H	IPR003131	Potassium channel tetramerisation-type BTB domain	Domain
B, D, F, H	IPR011333	SKP1/BTB/POZ domain superfamily	Homologous Superfamily
B, D, F, H	IPR027359	Voltage-dependent channel domain superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, C, E, G	Pharos: Q9NS61	atrial fibrillation breast fibroadenoma glioblastoma malignant glioma Pick disease atypical teratoid rhabdoid tumor congestive heart failure invasive ductal breast carcinoma medulloblastoma type 2 diabetes mellitus breast carcinoma ductal breast carcinoma in situ malignant ependymoma oligodendroglioma
B, D, F, H	Pharos: Q9UK17	Brugada syndrome Brugada syndrome 9 atrial fibrillation spinocerebellar ataxia type 19/22 Crohn disease autosomal dominant cerebellar ataxia malignant colon neoplasm malignant mesothelioma oligodendroglioma Paroxysmal atrial fibrillation adenoma progressive supranuclear palsy ulcerative colitis colorectal cancer glioblastoma Brugada syndrome Brugada syndrome 9 atrial fibrillation spinocerebellar ataxia type 19/22 Crohn disease autosomal dominant cerebellar ataxia malignant colon neoplasm malignant mesothelioma oligodendroglioma Paroxysmal atrial fibrillation adenoma progressive supranuclear palsy ulcerative colitis colorectal cancer glioblastoma interstitial cystitis lung cancer malignant ependymoma multiple sclerosis ovarian cancer astrocytic tumor atypical teratoid rhabdoid tumor hereditary ataxia Lambert-Eaton myasthenic syndrome lung carcinoma malignant glioma neurodegenerative disease Parkinson disease pituitary cancer transitional cell carcinoma familial atrial fibrillation intellectual disability large cell medulloblastoma

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B, C, D, E A, B, C, D, E, F, G, H	OPM	Transmembrane	Alpha-helical polytopic	Ion channel (VIC) superfamily	KvAP voltage-regulated K channels

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B, C, D, E A, B, C, D, E, F, G, H	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C, D, E A, B, C, D, E, F, G, H	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Channels: Potassium, Sodium, & Proton Ion-Selective	K_v4.3 Voltage-gated potassium 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 R01GM133198.