4J7C

KtrAB potassium transporter from Bacillus subtilis

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
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD
Membrane Protein Annotation: mpstruc

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Potassium channel/Rex NAD-binding domain-like	8057613	3000042	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Potassium channel/Rex NAD-binding domain-like	8057613	3000042	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Potassium channel/Rex NAD-binding domain-like	8057613	3000042	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Potassium channel/Rex NAD-binding domain-like	8057613	3000042	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Potassium channel/Rex NAD-binding domain-like	8057613	3000042	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Potassium channel/Rex NAD-binding domain-like	8057613	3000042	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	Potassium channel/Rex NAD-binding domain-like	8057613	3000042	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	Potassium channel/Rex NAD-binding domain-like	8057613	3000042	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	TrkA_C	e4j7cA4	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: TrkA_C	ECOD (1.6)
A	TrkA_N	e4j7cA3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: TrkA_N	ECOD (1.6)
B	TrkA_C	e4j7cB2	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: TrkA_C	ECOD (1.6)
B	TrkA_N	e4j7cB1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: TrkA_N	ECOD (1.6)
C	TrkA_C	e4j7cC4	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: TrkA_C	ECOD (1.6)
C	TrkA_N	e4j7cC3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: TrkA_N	ECOD (1.6)
D	TrkA_C	e4j7cD4	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: TrkA_C	ECOD (1.6)
D	TrkA_N	e4j7cD3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: TrkA_N	ECOD (1.6)
E	TrkA_C	e4j7cE4	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: TrkA_C	ECOD (1.6)
E	TrkA_N	e4j7cE3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: TrkA_N	ECOD (1.6)
F	TrkA_C	e4j7cF4	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: TrkA_C	ECOD (1.6)
F	TrkA_N	e4j7cF3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: TrkA_N	ECOD (1.6)
G	TrkA_C	e4j7cG4	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: TrkA_C	ECOD (1.6)
G	TrkA_N	e4j7cG3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: TrkA_N	ECOD (1.6)
H	TrkA_C	e4j7cH4	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: TrkA_C	ECOD (1.6)
H	TrkA_N	e4j7cH3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: TrkA_N	ECOD (1.6)
I	TrkH_1st	e4j7cI4	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: TrkH_1st	ECOD (1.6)
I	TrkH_3rd	e4j7cI1	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: TrkH_3rd	ECOD (1.6)
I	TrkH_2nd_1	e4j7cI2	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: TrkH_2nd_1	ECOD (1.6)
J	TrkH_1st	e4j7cJ4	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: TrkH_1st	ECOD (1.6)
J	TrkH_3rd	e4j7cJ2	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: TrkH_3rd	ECOD (1.6)
J	TrkH_2nd_1	e4j7cJ3	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: TrkH_2nd_1	ECOD (1.6)
K	TrkH_1st	e4j7cK4	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: TrkH_1st	ECOD (1.6)
K	TrkH_3rd	e4j7cK20	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: TrkH_3rd	ECOD (1.6)
K	TrkH_2nd_1	e4j7cK2	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: TrkH_2nd_1	ECOD (1.6)
L	TrkH_1st	e4j7cL4	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: TrkH_1st	ECOD (1.6)
L	TrkH_3rd	e4j7cL20	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: TrkH_3rd	ECOD (1.6)
L	TrkH_2nd_1	e4j7cL2	A: alpha complex topology	X: Voltage-gated ion channels (From Topology)	H: Voltage-gated ion channels (From Topology)	T: Voltage-gated ion channels	F: TrkH_2nd_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
A	3.30.70.1450	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	Regulator of K+ conductance, C-terminal domain	CATH (4.3.0)
B	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
B	3.30.70.1450	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	Regulator of K+ conductance, C-terminal domain	CATH (4.3.0)
C	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
C	3.30.70.1450	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	Regulator of K+ conductance, C-terminal domain	CATH (4.3.0)
D	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
D	3.30.70.1450	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	Regulator of K+ conductance, C-terminal domain	CATH (4.3.0)
E	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
E	3.30.70.1450	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	Regulator of K+ conductance, C-terminal domain	CATH (4.3.0)
F	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
F	3.30.70.1450	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	Regulator of K+ conductance, C-terminal domain	CATH (4.3.0)
G	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
G	3.30.70.1450	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	Regulator of K+ conductance, C-terminal domain	CATH (4.3.0)
H	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
H	3.30.70.1450	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	Regulator of K+ conductance, C-terminal domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E A, B, C, D, E, F, G, H	PF02080	TrkA-C domain (TrkA_C)	TrkA-C domain	This domain is often found next to the Pfam:PF02254 domain. The exact function of this domain is unknown. It has been suggested that it may bind an unidentified ligand [1]. The domain is predicted to adopt an all beta structure [1].	Domain
A, B, C, D, E A, B, C, D, E, F, G, H	PF02254	TrkA-N domain (TrkA_N)	TrkA-N domain	This domain is found in a wide variety of proteins. These protein include potassium channels Swiss:P31069, phosphoesterases Swiss:Q59027, and various other transporters. This domain binds to NAD.	Domain
I, J, K, L	PF02386	Cation transport protein (TrkH)	Cation transport protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E A, B, C, D, E, F, G, H	Ktr system potassium uptake protein A	monoatomic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity identical protein binding protein binding binding	localization transport monoatomic ion transport potassium ion transport monoatomic cation transport establishment of localization metal ion transport	cell periphery plasma membrane membrane cellular anatomical entity
I, J, K, L	Ktr system potassium uptake protein B	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 monoatomic ion transmembrane transporter activity active transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter 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 monoatomic ion transmembrane transporter activity active transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity metal ion transmembrane transporter activity transmembrane transporter activity symporter activity potassium:chloride symporter activity inorganic anion transmembrane transporter activity	-	cell periphery plasma membrane membrane cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E A, B, C, D, E, F, G, H	IPR006037	Regulator of K+ conductance, C-terminal	Domain
A, B, C, D, E A, B, C, D, E, F, G, H	IPR050721	Trk/Ktr/HKT Potassium Transport	Family
A, B, C, D, E A, B, C, D, E, F, G, H	IPR036291	NAD(P)-binding domain superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F, G, H	IPR036721	Regulator of K+ conductance, C-terminal domain superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F, G, H	IPR003148	Regulator of K+ conductance, N-terminal	Domain
I, J, K, L	IPR003445	Cation transporter	Family
I, J, K, L	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, I, J, K, L	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, I, J, K, L	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B, C, D, E A, B, C, D, E, F, G, H, I, J, K, L	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 A, B, C, D, E, F, G, H, I, J, K, L	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Superfamily of K⁺ Transporters (SKT proteins)	KtrAB potassium ion transporter