Annotations: 7VAF

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C [auth A]		e7vafA1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Aminotran_3	F:	ECOD (20:10:01)
B [auth L]		e7vafL1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Aminotran_3	F:	ECOD (20:10:01)
A [auth H]		e7vafH1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Aminotran_3	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth A]	1.20.1530.20	Mainly Alpha	Up-down Bundle	Na+/H+ antiporter like fold		CATH (utative)
B [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
A [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth L]	Light Chain	IGKV8	Kappa	sodium/bile acid cotransporter	SAbDab (2026-03-13)
A [auth H]	Heavy Chain	IGHV1	-	sodium/bile acid cotransporter	SAbDab (2026-03-13)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C [auth A]	PF01758	Sodium Bile acid symporter family (SBF)	Sodium Bile acid symporter family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth A]	Sodium/bile acid cotransporter	monoatomic cation transmembrane transporter activity solute:sodium symporter activity solute:monoatomic cation symporter activity lipid transmembrane transporter activity monocarboxylate:sodium symporter activity bile acid:sodium symporter activity carboxylic acid transmembrane transporter activity sodium ion transmembrane transporter activity secondary active transmembrane transporter activity secondary active monocarboxylate transmembrane transporter activity lipid transporter activity organic acid:sodium symporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity monoatomic cation transmembrane transporter activity solute:sodium symporter activity solute:monoatomic cation symporter activity lipid transmembrane transporter activity monocarboxylate:sodium symporter activity bile acid:sodium symporter activity carboxylic acid transmembrane transporter activity sodium ion transmembrane transporter activity secondary active transmembrane transporter activity secondary active monocarboxylate transmembrane transporter activity lipid transporter activity organic acid:sodium symporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity monocarboxylic acid transmembrane transporter activity metal ion transmembrane transporter activity transmembrane transporter activity symporter activity bile acid transmembrane transporter activity	response to stimulus response to hormone response to endogenous stimulus response to chemical response to estrogen cellular response to stimulus cellular response to chemical stimulus cellular response to xenobiotic stimulus cellular process response to xenobiotic stimulus response to nutrient levels organic anion transport carboxylic acid transport transport response to stimulus response to hormone response to endogenous stimulus response to chemical response to estrogen cellular response to stimulus cellular response to chemical stimulus cellular response to xenobiotic stimulus cellular process response to xenobiotic stimulus response to nutrient levels organic anion transport carboxylic acid transport transport lipid localization bile acid and bile salt transport lipid transport organic hydroxy compound transport establishment of localization organic acid transport localization monocarboxylic acid transport macromolecule localization response to alcohol response to oxygen-containing compound response to ethanol	cellular anatomical structure membrane cell periphery plasma membrane basal part of cell basal plasma membrane plasma membrane region basolateral plasma membrane
B [auth L]	Fab light chain from antibody IgG clone number YN69202	-	-	-
A [auth H]	Fab heavy chain from antibody IgG clone number YN69202	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth A]	IPR004710	Bile acid:sodium symporter	Family
C [auth A]	IPR002657	Bile acid:sodium symporter/arsenical resistance protein Acr3	Family
C [auth A]	IPR038770	Sodium/solute symporter superfamily	Homologous Superfamily

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
C [auth A]	OPM	Transmembrane	Alpha-helical polytopic	Monovalent cation-proton antiporter	Bile Acid:Na+ Symporter (BASS) Family

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
C [auth A]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
C [auth A]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Apical Sodium-Dependent Bile Acid Transporters (ASBT)	sodium taurocholate co-transporting polypeptide (NTCP), in complex with YN69202Fab

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.