Annotations: 3L4B

Crystal Structure of an Octomeric Two-Subunit TrkA K+ Channel Ring Gating Assembly, TM1088A:TM1088B, from Thermotoga maritima

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
F	SCOP2 Family	Potassium channel NAD-binding domain	8085872	4000005	SCOP2 (2022-06-29)
F	SCOP2 Superfamily	Potassium channel/Rex NAD-binding domain-like	8085873	3000042	SCOP2 (2022-06-29)
E	SCOP2B Superfamily	Potassium channel/Rex NAD-binding domain-like	8085873	3000042	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Potassium channel/Rex NAD-binding domain-like	8085873	3000042	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Potassium channel/Rex NAD-binding domain-like	8085873	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)
H	RVP	e3l4bH1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: RVP	ECOD (v294.2)
G	RVP	e3l4bG1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: RVP	ECOD (v294.2)
D	RVP	e3l4bD1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: RVP	ECOD (v294.2)
C	Pyr_redox	e3l4bC1	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: HTH	T: winged helix domain	F: Pyr_redox	ECOD (v294.2)
F	RVP	e3l4bF1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: RVP	ECOD (v294.2)
E	RVP	e3l4bE1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: RVP	ECOD (v294.2)
B	RVP	e3l4bB1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: RVP	ECOD (v294.2)
A	FeS_assembly_P	e3l4bA1	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: HTH	T: winged helix domain	F: FeS_assembly_P	ECOD (v294.2)

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 (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)
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)
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)
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)
F	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like 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)
B	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
A	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C, D, G, H	TrkA K+ Channel protein TM1088B	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	-	cell periphery cellular anatomical structure plasma membrane membrane
A, B, E, F	TrkA K+ Channel protein TM1088A	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	-	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

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

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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.