2AEM | pdb_00002aem

Crystal Structures of the MthK RCK Domain

External Resource: Annotation

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

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2aema1	Alpha and beta proteins (a/b)	NAD(P)-binding Rossmann-fold domains	NAD(P)-binding Rossmann-fold domains	Potassium channel NAD-binding domain	Potassium channel-related protein MthK	(Methanothermobacter thermautotrophicus ) [TaxId: 145262 ],	SCOPe (2.08)
A	d2aema2	Alpha and beta proteins (a+b)	TrkA C-terminal domain-like	TrkA C-terminal domain-like	TrkA C-terminal domain-like	Potassium channel-related protein MthK, C-terminal domain	(Methanothermobacter thermautotrophicus ) [TaxId: 145262 ],	SCOPe (2.08)
A	d2aema3	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Methanothermobacter thermautotrophicus ) [TaxId: 145262 ],	SCOPe (2.08)

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	8057606	3000042	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	TrkA C-terminal domain-like	8057608	3000037	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	e2aemA1	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	e2aemA2	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)

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	1.20.5.870	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Voltage-gated potassium channel	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)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	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	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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Calcium-gated potassium channel mthK	monoatomic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity cation binding ion binding binding metal ion binding small molecule binding identical protein binding protein binding	localization transport monoatomic ion transport potassium ion transport monoatomic cation transport establishment of localization metal ion transport	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR006037	Regulator of K+ conductance, C-terminal	Domain
A	IPR050721	Trk/Ktr/HKT Potassium Transport	Family
A	IPR013099	Potassium channel domain	Domain
A	IPR036291	NAD(P)-binding domain superfamily	Homologous Superfamily
A	IPR036721	Regulator of K+ conductance, C-terminal domain superfamily	Homologous Superfamily
A	IPR003148	Regulator of K+ conductance, N-terminal	Domain

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.