Annotations: 6V4J

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
H	V-set	e6v4jH1	A: a/b three-layered sandwiches	X: Family A G protein-coupled receptor-like	H: beta-sandwich domain in metalloprotease stcE	T: beta-sandwich domain in metalloprotease stcE	F: V-set	ECOD (v294.1)
G	V-set	e6v4jG1	A: a/b three-layered sandwiches	X: Family A G protein-coupled receptor-like	H: beta-sandwich domain in metalloprotease stcE	T: beta-sandwich domain in metalloprotease stcE	F: V-set	ECOD (v294.1)
F	V-set	e6v4jF1	A: a/b three-layered sandwiches	X: Family A G protein-coupled receptor-like	H: beta-sandwich domain in metalloprotease stcE	T: beta-sandwich domain in metalloprotease stcE	F: V-set	ECOD (v294.1)
E	V-set	e6v4jE1	A: a/b three-layered sandwiches	X: Family A G protein-coupled receptor-like	H: beta-sandwich domain in metalloprotease stcE	T: beta-sandwich domain in metalloprotease stcE	F: V-set	ECOD (v294.1)
D	V-set	e6v4jD1	A: a/b three-layered sandwiches	X: Family A G protein-coupled receptor-like	H: beta-sandwich domain in metalloprotease stcE	T: beta-sandwich domain in metalloprotease stcE	F: V-set	ECOD (v294.1)
C	V-set	e6v4jC1	A: a/b three-layered sandwiches	X: Family A G protein-coupled receptor-like	H: beta-sandwich domain in metalloprotease stcE	T: beta-sandwich domain in metalloprotease stcE	F: V-set	ECOD (v294.1)
B	V-set	e6v4jB1	A: a/b three-layered sandwiches	X: Family A G protein-coupled receptor-like	H: beta-sandwich domain in metalloprotease stcE	T: beta-sandwich domain in metalloprotease stcE	F: V-set	ECOD (v294.1)
A	V-set	e6v4jA1	A: a/b three-layered sandwiches	X: Family A G protein-coupled receptor-like	H: beta-sandwich domain in metalloprotease stcE	T: beta-sandwich domain in metalloprotease stcE	F: V-set	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
H	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (utative)
G	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (utative)
F	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (utative)
E	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (utative)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
E, F, G, H	Potassium uptake protein TrkA	monoatomic cation transmembrane transporter activity potassium ion transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity binding nucleoside phosphate binding nucleotide binding heterocyclic compound binding small molecule binding cation binding ion binding metal ion binding	-	cell periphery cellular anatomical structure plasma membrane membrane
A, B, C, D	Trk system potassium uptake protein TrkH	cation binding ion binding binding potassium ion binding alkali metal ion binding metal ion binding small molecule binding identical protein binding protein binding protein homodimerization activity protein dimerization activity monoatomic cation transmembrane transporter activity monoatomic anion transmembrane transporter activity chloride transmembrane transporter activity cation binding ion binding binding potassium ion binding alkali metal ion binding metal ion binding small molecule binding identical protein binding protein binding protein homodimerization activity protein dimerization activity monoatomic cation transmembrane transporter activity monoatomic anion transmembrane transporter activity chloride transmembrane transporter activity solute:monoatomic cation symporter activity potassium ion transmembrane transporter activity monoatomic anion:monoatomic cation symporter activity secondary active transmembrane transporter activity chloride:monoatomic cation symporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity symporter activity potassium:chloride symporter activity monoatomic ion channel activity potassium channel activity monoatomic cation channel activity passive transmembrane transporter activity channel activity	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	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
E, F, G, H	IPR006037	Regulator of K+ conductance, C-terminal	Domain
E, F, G, H	IPR050721	Trk/Ktr/HKT Potassium Transport	Family
E, F, G, H	IPR036291	NAD(P)-binding domain superfamily	Homologous Superfamily
E, F, G, H	IPR036721	Regulator of K+ conductance, C-terminal domain superfamily	Homologous Superfamily
E, F, G, H	IPR006036	Potassium uptake protein TrkA	Family
E, F, G, H	IPR003148	Regulator of K+ conductance, N-terminal lobe	Domain
A, B, C, D	IPR003445	Cation transporter	Family
A, B, C, D	IPR004772	TrkH potassium transport family	Family

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	Potassium transporter TrkH/TrkA complex

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	Superfamily of K⁺ Transporters (SKT proteins)	TrkH potassium ion transporter in complex with TrkA in complex with ATP

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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.