Annotations: 6V22

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
G [auth D]	Ion_trans_2	e6v22D2	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: Ion_trans_2	ECOD (1.6)
G [auth D]	BK_channel_a	e6v22D1	A: a+b two layers	X: TrkA C-terminal domain-like (From Topology)	H: TrkA C-terminal domain-like (From Topology)	T: TrkA C-terminal domain-like	F: BK_channel_a	ECOD (1.6)
G [auth D]	KOG1420	e6v22D5	A: a+b two layers	X: TrkA C-terminal domain-like (From Topology)	H: TrkA C-terminal domain-like (From Topology)	T: TrkA C-terminal domain-like	F: KOG1420	ECOD (1.6)
G [auth D]	TrkA_N_1	e6v22D3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: TrkA_N_1	ECOD (1.6)
A	Ion_trans_2	e6v22A1	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: Ion_trans_2	ECOD (1.6)
A	BK_channel_a	e6v22A2	A: a+b two layers	X: TrkA C-terminal domain-like (From Topology)	H: TrkA C-terminal domain-like (From Topology)	T: TrkA C-terminal domain-like	F: BK_channel_a	ECOD (1.6)
A	KOG1420	e6v22A4	A: a+b two layers	X: TrkA C-terminal domain-like (From Topology)	H: TrkA C-terminal domain-like (From Topology)	T: TrkA C-terminal domain-like	F: KOG1420	ECOD (1.6)
A	TrkA_N_1	e6v22A5	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: TrkA_N_1	ECOD (1.6)
C [auth B]	Ion_trans_2	e6v22B2	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: Ion_trans_2	ECOD (1.6)
C [auth B]	BK_channel_a	e6v22B4	A: a+b two layers	X: TrkA C-terminal domain-like (From Topology)	H: TrkA C-terminal domain-like (From Topology)	T: TrkA C-terminal domain-like	F: BK_channel_a	ECOD (1.6)
C [auth B]	KOG1420	e6v22B3	A: a+b two layers	X: TrkA C-terminal domain-like (From Topology)	H: TrkA C-terminal domain-like (From Topology)	T: TrkA C-terminal domain-like	F: KOG1420	ECOD (1.6)
C [auth B]	TrkA_N_1	e6v22B5	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: TrkA_N_1	ECOD (1.6)
E [auth C]	Ion_trans_2	e6v22C4	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: Ion_trans_2	ECOD (1.6)
E [auth C]	BK_channel_a	e6v22C2	A: a+b two layers	X: TrkA C-terminal domain-like (From Topology)	H: TrkA C-terminal domain-like (From Topology)	T: TrkA C-terminal domain-like	F: BK_channel_a	ECOD (1.6)
E [auth C]	KOG1420	e6v22C3	A: a+b two layers	X: TrkA C-terminal domain-like (From Topology)	H: TrkA C-terminal domain-like (From Topology)	T: TrkA C-terminal domain-like	F: KOG1420	ECOD (1.6)
E [auth C]	TrkA_N_1	e6v22C1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: TrkA_N_1	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C [auth B], E [auth C], G [auth D]	PF21014	Ca2+-activated K+ channel Slowpoke, TrkA_C like domain (Slowpoke_C)	Ca2+-activated K+ channel Slowpoke, TrkA_C like domain	This domain is found at the cytoplasmic C-terminus of the drosophila slowpoke K+ channel. It is related to the TrkA C-terminal domain Pfam:PF02080.	Domain
A, C [auth B], E [auth C], G [auth D]	PF03493	Calcium-activated BK potassium channel alpha subunit (BK_channel_a)	Calcium-activated BK potassium channel alpha subunit	-	Family
A, C [auth B], E [auth C], G [auth D]	PF07885	Ion channel (Ion_trans_2)	Ion channel	-	Family
A, C [auth B], E [auth C], G [auth D]	PF00520	Ion transport protein (Ion_trans)	Ion transport protein	-	Family
A, C [auth B], E [auth C], G [auth D]	PF22614	Calcium-activated potassium channel slowpoke-like RCK domain (Slo-like_RCK)	Calcium-activated potassium channel slowpoke-like RCK domain	This entry includes calcium-activated potassium channels, known as BK channels or Slowpoke homologues (Slo1-3) which includes calcium-activated potassium channel slowpoke from Drosophila (Slo) and its homologues from vertebrates KCMA1, KCNT1/2 and KC ...	This entry includes calcium-activated potassium channels, known as BK channels or Slowpoke homologues (Slo1-3) which includes calcium-activated potassium channel slowpoke from Drosophila (Slo) and its homologues from vertebrates KCMA1, KCNT1/2 and KCNU1. This entry represents the C-terminal regulator of K+ conductance (RCK) domains which appear as tandem domains in these proteins [1-5]. The RCK domain has a Rossmann-fold topology with unique positions that compose a well-conserved salt bridge and a hydrophobic dimer interface. This domain is also presents in prokaryotic K+ channels.	Domain
B [auth E], D [auth F], F [auth G], H	PF03185	Calcium-activated potassium channel, beta subunit (CaKB)	Calcium-activated potassium channel, beta subunit	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C [auth B], E [auth C], G [auth D]	Calcium-activated potassium channel subunit alpha-1	monoatomic cation transmembrane transporter activity calcium-activated cation channel activity gated channel activity monoatomic ion channel activity potassium ion transmembrane transporter activity potassium channel activity monoatomic ion-gated channel activity calcium-activated potassium channel activity ligand-gated channel activity ligand-gated monoatomic ion channel activity large conductance calcium-activated potassium channel activity monoatomic cation channel activity passive transmembrane transporter activity inorganic molecular entity transmembrane transporter activity channel activity monoatomic cation transmembrane transporter activity calcium-activated cation channel activity gated channel activity monoatomic ion channel activity potassium ion transmembrane transporter activity potassium channel activity monoatomic ion-gated channel activity calcium-activated potassium channel activity ligand-gated channel activity ligand-gated monoatomic ion channel activity large conductance calcium-activated potassium channel activity monoatomic cation channel activity passive transmembrane transporter activity inorganic molecular entity transmembrane transporter activity channel activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity ligand-gated monoatomic cation channel activity metal ion transmembrane transporter activity transmembrane transporter activity voltage-gated channel activity voltage-gated monoatomic ion channel activity voltage-gated monoatomic cation channel activity voltage-gated potassium channel activity cytoskeletal protein binding actin binding protein binding binding cation binding ion binding metal ion binding small molecule binding identical protein binding	potassium ion homeostasis inorganic ion homeostasis homeostatic process cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis intracellular potassium ion homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis transport monoatomic ion transmembrane transport potassium ion transmembrane transport potassium ion homeostasis inorganic ion homeostasis homeostatic process cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis intracellular potassium ion homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis transport monoatomic ion transmembrane transport potassium ion transmembrane transport inorganic ion transmembrane transport 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 response to stimulus response to metal ion response to chemical response to calcium ion regulation of biological process positive regulation of programmed cell death regulation of cellular process regulation of apoptotic process biological regulation positive regulation of biological process regulation of programmed cell death cell death positive regulation of apoptotic process apoptotic process programmed cell death positive regulation of cellular process excretion multicellular organismal process micturition system process renal system process smooth muscle contraction involved in micturition urinary bladder smooth muscle contraction muscle contraction muscle system process smooth muscle contraction urinary tract smooth muscle contraction regulation of cellular component size cell volume homeostasis cellular component organization negative regulation of cell volume cellular component organization or biogenesis regulation of biological quality regulation of cell size regulation of anatomical structure size regulation of tube diameter regulation of tube size circulatory system process vascular process in circulatory system blood vessel diameter maintenance vasodilation blood circulation regulation of membrane potential response to decreased oxygen levels response to hypoxia response to stress response to oxygen levels response to abiotic stimulus response to carbon monoxide response to oxygen-containing compound response to osmotic stress	cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane apical part of cell apical plasma membrane membrane microdomain membrane raft cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane apical part of cell apical plasma membrane membrane microdomain membrane raft plasma membrane raft caveola 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
B [auth E], D [auth F], F [auth G], H	Calcium-activated potassium channel subunit beta-4	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 potassium channel regulator activity channel regulator activity ion channel regulator activity molecular function regulator 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 potassium channel regulator activity channel regulator activity ion channel regulator activity molecular function regulator activity transporter regulator activity monoatomic cation transmembrane transporter activity calcium-activated cation channel activity potassium ion transmembrane transporter activity potassium channel activity monoatomic ion-gated channel activity calcium-activated potassium channel activity ligand-gated channel activity ligand-gated monoatomic ion channel activity monoatomic cation channel activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity ligand-gated monoatomic cation channel activity metal ion transmembrane transporter activity	localization transport monoatomic ion transport potassium ion transport monoatomic cation transport establishment of localization metal ion transport multicellular organismal process system process nervous system process biological regulation action potential transmission of nerve impulse cell communication localization transport monoatomic ion transport potassium ion transport monoatomic cation transport establishment of localization metal ion transport multicellular organismal process system process nervous system process biological regulation action potential transmission of nerve impulse cell communication neuronal action potential cellular process regulation of biological quality regulation of membrane potential trans-synaptic signaling synaptic signaling regulation of biological process signaling anterograde trans-synaptic signaling cell-cell signaling chemical synaptic transmission regulation of tube diameter regulation of tube size regulation of system process circulatory system process regulation of blood circulation regulation of vasoconstriction vascular process in circulatory system regulation of multicellular organismal process blood vessel diameter maintenance blood circulation vasoconstriction regulation of anatomical structure size detection of stimulus response to stimulus response to metal ion response to chemical detection of chemical stimulus detection of calcium ion response to calcium ion regulation of localization cellular localization regulation of cellular process modulation of chemical synaptic transmission regulation of secretion by cell secretion by cell signal release establishment of localization in cell regulation of signaling neurotransmitter secretion regulation of transport secretion regulation of neurotransmitter transport export from cell neurotransmitter transport regulation of secretion signal release from synapse regulation of trans-synaptic signaling regulation of neurotransmitter secretion regulation of cell communication	cellular anatomical structure synapse cell junction cell periphery plasma membrane membrane 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 cellular anatomical structure synapse cell junction cell periphery plasma membrane membrane 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

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C [auth B], E [auth C], G [auth D]	IPR047871	Calcium-activated potassium channel slowpoke-like	Family
A, C [auth B], E [auth C], G [auth D]	IPR005821	Ion transport domain	Domain
A, C [auth B], E [auth C], G [auth D]	IPR036291	NAD(P)-binding domain superfamily	Homologous Superfamily
A, C [auth B], E [auth C], G [auth D]	IPR003929	Calcium-activated potassium channel BK, alpha subunit	Domain
A, C [auth B], E [auth C], G [auth D]	IPR048735	Ca2+-activated K+ channel Slowpoke-like, C-terminal domain	Domain
B [auth E], D [auth F], F [auth G], H	IPR003930	Potassium channel, calcium-activated, BK, beta subunit	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, C [auth B], E [auth C], G [auth D]	Pharos: Q12791	generalized epilepsy-paroxysmal dyskinesia syndrome status epilepticus renal cell carcinoma obesity disorder pulmonary hypertension Weight Gain chromophobe renal cell carcinoma sarcomatoid renal cell carcinoma hypospadias morbid obesity collecting duct carcinoma papillary renal cell carcinoma intellectual disability sarcoidosis lung cancer generalized epilepsy-paroxysmal dyskinesia syndrome status epilepticus renal cell carcinoma obesity disorder pulmonary hypertension Weight Gain chromophobe renal cell carcinoma sarcomatoid renal cell carcinoma hypospadias morbid obesity collecting duct carcinoma papillary renal cell carcinoma intellectual disability sarcoidosis lung cancer malignant ependymoma medulloblastoma astrocytic tumor non-alcoholic fatty liver disease oligodendroglioma cystic fibrosis pancreatic intraductal papillary-mucinous neoplasm epilepsy genetic endocrine growth disease primitive neuroectodermal tumor renal carcinoma interstitial cystitis lung carcinoma malignant glioma atypical teratoid rhabdoid tumor nasopharyngeal carcinoma clear cell renal carcinoma congenital diaphragmatic hernia pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia glioblastoma psoriasis large cell medulloblastoma malignant colon neoplasm malignant mesothelioma autism breast cancer pancreatic ductal adenocarcinoma endometriosis pilocytic astrocytoma
B [auth E], D [auth F], F [auth G], H	Pharos: Q86W47	astrocytic tumor large cell medulloblastoma lung carcinoma medulloblastoma pancreatic intraductal papillary-mucinous carcinoma primitive neuroectodermal tumor atypical teratoid rhabdoid tumor lung adenocarcinoma malignant ependymoma non-small cell lung carcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia psoriasis glioblastoma lung cancer malignant glioma astrocytic tumor large cell medulloblastoma lung carcinoma medulloblastoma pancreatic intraductal papillary-mucinous carcinoma primitive neuroectodermal tumor atypical teratoid rhabdoid tumor lung adenocarcinoma malignant ependymoma non-small cell lung carcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia psoriasis glioblastoma lung cancer malignant glioma oligodendroglioma pituitary cancer subependymal giant cell astrocytoma

Membrane Protein Annotation: OPM OPM Database Homepage

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

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

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

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

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

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B [auth E], C [auth B], D [auth F], E [auth C] A, B [auth E], C [auth B], D [auth F], E [auth C], F [auth G], G [auth D], H	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Channels: Potassium, Sodium, & Proton Ion-Selective	Human BK (SLO1) K⁺ channel in complex with β4, Ca²⁺ bound

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.