7W6S | pdb_00007w6s

CryoEM structure of human KChIP2-Kv4.3 complex

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: mpstruc

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
H	SCOP2B Superfamily	POZ domain	8041222	3000894	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	POZ domain	8041222	3000894	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	POZ domain	8041222	3000894	SCOP2B (2022-06-29)
B	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)
G	EF-hand_7_2	e7w6sG1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_2	ECOD (1.6)
G	EF-hand_7_10	e7w6sG2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_10	ECOD (1.6)
E	EF-hand_7_2	e7w6sE1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_2	ECOD (1.6)
E	EF-hand_7_10	e7w6sE2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_10	ECOD (1.6)
C	EF-hand_7_2	e7w6sC1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_2	ECOD (1.6)
C	EF-hand_7_10	e7w6sC2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_10	ECOD (1.6)
A	EF-hand_7_2	e7w6sA2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_2	ECOD (1.6)
A	EF-hand_7_10	e7w6sA1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_10	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
H	3.30.710.10	Alpha Beta	2-Layer Sandwich	Potassium Channel Kv1.1	Chain A	CATH (utative)
H	1.20.120.350	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Voltage-gated potassium channels. Chain C	CATH (utative)
H	1.10.287.70	Mainly Alpha	Orthogonal Bundle	Helix Hairpins		CATH (utative)
F	3.30.710.10	Alpha Beta	2-Layer Sandwich	Potassium Channel Kv1.1	Chain A	CATH (utative)
F	1.20.120.350	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Voltage-gated potassium channels. Chain C	CATH (utative)
F	1.10.287.70	Mainly Alpha	Orthogonal Bundle	Helix Hairpins		CATH (utative)
D	3.30.710.10	Alpha Beta	2-Layer Sandwich	Potassium Channel Kv1.1	Chain A	CATH (utative)
D	1.20.120.350	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Voltage-gated potassium channels. Chain C	CATH (utative)
D	1.10.287.70	Mainly Alpha	Orthogonal Bundle	Helix Hairpins		CATH (utative)
B	3.30.710.10	Alpha Beta	2-Layer Sandwich	Potassium Channel Kv1.1	Chain A	CATH (utative)
B	1.20.120.350	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Voltage-gated potassium channels. Chain C	CATH (utative)
B	1.10.287.70	Mainly Alpha	Orthogonal Bundle	Helix Hairpins		CATH (utative)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
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	PF07885	Ion channel (Ion_trans_2)	Ion channel	-	Family
B, D, F, H	PF00520	Ion transport protein (Ion_trans)	Ion transport protein	-	Family
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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
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 channel activity monoatomic ion transmembrane transporter 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 channel activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity cation binding ion binding binding metal ion binding small molecule binding voltage-gated potassium channel activity involved in cardiac muscle cell action potential repolarization	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 heart contraction blood circulation transport monoatomic ion transmembrane transport 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 heart contraction blood circulation transport monoatomic ion transmembrane transport potassium ion transmembrane transport establishment of localization metal ion transport monoatomic cation transmembrane transport transmembrane transport localization monoatomic ion transport potassium ion transport cellular process monoatomic cation transport cardiac muscle cell membrane repolarization membrane repolarization ventricular cardiac muscle cell membrane repolarization regulation of biological quality regulation of membrane potential cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein tetramerization protein-containing complex assembly cellular component organization or biogenesis action potential export from cell export across plasma membrane potassium ion export across plasma membrane cardiac muscle cell action potential involved in contraction membrane repolarization during cardiac muscle cell action potential cardiac muscle contraction striated muscle contraction actin filament-based process cardiac muscle cell contraction ventricular cardiac muscle cell 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 trans-synaptic signaling synaptic signaling signaling anterograde trans-synaptic signaling cell-cell signaling chemical synaptic transmission cell communication protein homooligomerization cardiac conduction regulation of heart rate by cardiac conduction regulation of heart rate	cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane sarcolemma postsynaptic specialization membrane postsynaptic specialization organelle cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region 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 Kv4.3-KChIP1 channel complex cell body neuronal cell body
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 channel activity monoatomic ion 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 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	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 heart contraction blood circulation membrane repolarization regulation of membrane repolarization 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 heart contraction blood circulation membrane repolarization regulation of membrane repolarization regulation of biological quality regulation of membrane potential cellular response to stimulus regulation of signaling regulation of cellular process response to stimulus signaling regulation of signal transduction cell communication regulation of response to stimulus regulation of cell communication cellular process signal transduction action potential 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 localization transport monoatomic ion transport potassium ion transport monoatomic cation transport establishment of localization metal ion transport 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 regulation of localization regulation of potassium ion transport monoatomic ion transmembrane transport potassium ion transmembrane transport regulation of monoatomic ion transmembrane transport export across plasma membrane potassium ion export across plasma membrane monoatomic cation transmembrane transport regulation of metal ion transport regulation of transport regulation of monoatomic ion transport export from cell regulation of potassium ion transmembrane transport transmembrane transport regulation of transmembrane transport regulation of potassium ion export across plasma membrane regulation of monoatomic cation transmembrane transport positive regulation of cation transmembrane transport positive regulation of biological process positive regulation of monoatomic ion transport positive regulation of potassium ion export across plasma membrane positive regulation of transmembrane transport positive regulation of monoatomic ion transmembrane transport positive regulation of cellular process positive regulation of potassium ion transport positive regulation of transport positive regulation of potassium ion transmembrane transport detection of stimulus response to metal ion response to chemical detection of chemical stimulus detection of calcium ion response to calcium ion	voltage-gated potassium channel complex protein-containing complex plasma membrane protein complex membrane plasma membrane potassium channel complex membrane protein complex cation channel complex transporter complex Kv4.2-KChIP2 channel complex cell periphery cellular anatomical structure 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 transporter complex Kv4.2-KChIP2 channel complex cell periphery cellular anatomical structure 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

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B, D, F, H	IPR021645	Shal-type voltage-gated potassium channels, N-terminal	Domain
B, D, F, H	IPR028325	Voltage-gated potassium channel	Family
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
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

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
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
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

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 R01GM157729.