Annotations: 6V1Y

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF00027	e6v1yA2	A: beta sandwiches	X: jelly-roll	H: Double-stranded beta-helix (From Topology)	T: Double-stranded beta-helix	F: PF00027	ECOD (1.6)
A	PF00520	e6v1yA1	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: PF00520	ECOD (1.6)
B	PF00027	e6v1yB2	A: beta sandwiches	X: jelly-roll	H: Double-stranded beta-helix (From Topology)	T: Double-stranded beta-helix	F: PF00027	ECOD (1.6)
B	PF00520	e6v1yB1	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: PF00520	ECOD (1.6)
C	PF00027	e6v1yC2	A: beta sandwiches	X: jelly-roll	H: Double-stranded beta-helix (From Topology)	T: Double-stranded beta-helix	F: PF00027	ECOD (1.6)
C	PF00520	e6v1yC1	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: PF00520	ECOD (1.6)
D	PF00027	e6v1yD2	A: beta sandwiches	X: jelly-roll	H: Double-stranded beta-helix (From Topology)	T: Double-stranded beta-helix	F: PF00027	ECOD (1.6)
D	PF00520	e6v1yD1	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: PF00520	ECOD (1.6)
E [auth M]	PF00027	e6v1yM2	A: beta sandwiches	X: jelly-roll	H: Double-stranded beta-helix (From Topology)	T: Double-stranded beta-helix	F: PF00027	ECOD (1.6)
E [auth M]	PF00520	e6v1yM1	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: PF00520	ECOD (1.6)
F [auth N]	PF00027	e6v1yN2	A: beta sandwiches	X: jelly-roll	H: Double-stranded beta-helix (From Topology)	T: Double-stranded beta-helix	F: PF00027	ECOD (1.6)
F [auth N]	PF00520	e6v1yN1	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: PF00520	ECOD (1.6)
G [auth O]	PF00027	e6v1yO2	A: beta sandwiches	X: jelly-roll	H: Double-stranded beta-helix (From Topology)	T: Double-stranded beta-helix	F: PF00027	ECOD (1.6)
G [auth O]	PF00520	e6v1yO1	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: PF00520	ECOD (1.6)
H [auth P]	PF00027	e6v1yP2	A: beta sandwiches	X: jelly-roll	H: Double-stranded beta-helix (From Topology)	T: Double-stranded beta-helix	F: PF00027	ECOD (1.6)
H [auth P]	PF00520	e6v1yP1	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: PF00520	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E [auth M], A, B, C, D, E [auth M], F [auth N], G [auth O], H [auth P]	PF07885	Ion channel (Ion_trans_2)	Ion channel	-	Family
A, B, C, D, E [auth M], A, B, C, D, E [auth M], F [auth N], G [auth O], H [auth P]	PF00520	Ion transport protein (Ion_trans)	Ion transport protein	-	Family
A, B, C, D, E [auth M], A, B, C, D, E [auth M], F [auth N], G [auth O], H [auth P]	PF00027	Cyclic nucleotide-binding domain (cNMP_binding)	Cyclic nucleotide-binding domain	This domain sensor domain can bind cAMP, cGMP, c-di-GMP, oxygen and 2-oxoglutarate (Matilla et. al., FEMS Microbiology Reviews, fuab043, 45, 2021, 1. https://doi.org/10.1093/femsre/fuab043).	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E [auth M], A, B, C, D, E [auth M], F [auth N], G [auth O], H [auth P]	Potassium channel KAT1	inward rectifier potassium channel activity monoatomic cation transmembrane transporter activity gated channel activity monoatomic ion channel activity potassium ion transmembrane transporter activity voltage-gated channel activity voltage-gated monoatomic ion channel activity potassium channel activity voltage-gated monoatomic cation channel activity ligand-gated channel activity ligand-gated monoatomic ion channel activity monoatomic cation channel activity passive transmembrane transporter activity voltage-gated potassium channel activity inorganic molecular entity transmembrane transporter activity inward rectifier potassium channel activity monoatomic cation transmembrane transporter activity gated channel activity monoatomic ion channel activity potassium ion transmembrane transporter activity voltage-gated channel activity voltage-gated monoatomic ion channel activity potassium channel activity voltage-gated monoatomic cation channel activity ligand-gated channel activity ligand-gated monoatomic ion 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 ligand-gated monoatomic cation channel activity transmembrane transporter activity identical protein binding protein binding binding	-	cell periphery plasma membrane membrane cellular anatomical entity protein-containing complex transmembrane transporter complex membrane protein complex transporter complex monoatomic ion channel complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E [auth M], A, B, C, D, E [auth M], F [auth N], G [auth O], H [auth P]	IPR005821	Ion transport domain	Domain
A, B, C, D, E [auth M], A, B, C, D, E [auth M], F [auth N], G [auth O], H [auth P]	IPR021789	KHA domain	Domain
A, B, C, D, E [auth M], A, B, C, D, E [auth M], F [auth N], G [auth O], H [auth P]	IPR003938	Potassium channel, voltage-dependent, EAG/ELK/ERG	Family
A, B, C, D, E [auth M], A, B, C, D, E [auth M], F [auth N], G [auth O], H [auth P]	IPR045319	Potassium channel KAT/AKT	Family
A, B, C, D, E [auth M], A, B, C, D, E [auth M], F [auth N], G [auth O], H [auth P]	IPR000595	Cyclic nucleotide-binding domain	Domain
A, B, C, D, E [auth M], A, B, C, D, E [auth M], F [auth N], G [auth O], H [auth P]	IPR018490	Cyclic nucleotide-binding domain superfamily	Homologous Superfamily
A, B, C, D, E [auth M], A, B, C, D, E [auth M], F [auth N], G [auth O], H [auth P]	IPR014710	RmlC-like jelly roll fold	Homologous Superfamily

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B, C, D, E [auth M] A, B, C, D, E [auth M], F [auth N], G [auth O], H [auth P]	OPM	Transmembrane	Alpha-helical polytopic	Ion channel (VIC) superfamily	Plant inwardly rectifying potassium channel

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

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

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

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

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C, D, E [auth M] A, B, C, D, E [auth M], F [auth N], G [auth O], H [auth P]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Channels: Potassium, Sodium, & Proton Ion-Selective	KAT1 Hyperpolarization-Activated Potassium Channel, tetramer

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.