4KPP

Crystal Structure of H+/Ca2+ Exchanger CAX

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
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	Sodium/calcium exchanger-like	8053551	3002205	SCOP2B (2022-06-29)
B	SCOP2 Family	Sodium/calcium exchanger	8049380	4006475	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Sodium/calcium exchanger-like	8053551	3002205	SCOP2 (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	Na_Ca_ex	e4kppA1	A: alpha bundles	X: Sodium/Calcium exchanger (From Topology)	H: Sodium/Calcium exchanger (From Topology)	T: Sodium/Calcium exchanger	F: Na_Ca_ex	ECOD (1.6)
B	Na_Ca_ex	e4kppB1	A: alpha bundles	X: Sodium/Calcium exchanger (From Topology)	H: Sodium/Calcium exchanger (From Topology)	T: Sodium/Calcium exchanger	F: Na_Ca_ex	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01699	Sodium/calcium exchanger protein (Na_Ca_ex)	Sodium/calcium exchanger protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Putative uncharacterized protein	cation binding ion binding binding metal ion binding small molecule binding	transmembrane transport localization transport cellular process establishment of localization	cellular anatomical structure membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR044880	NCX, central ion-binding domain superfamily	Homologous Superfamily
A, B	IPR004837	Sodium/calcium exchanger membrane region	Domain

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B	OPM				Sodium/calcium exchanger

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Ca²⁺:Cation Antiporter (CaCA) Family	Ca²⁺/H⁺ (CaX) antiporter

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.