Annotations: 7FCI

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	SBF	e7fciA1	A: alpha complex topology	X: Cation-proton antiporter	H: Cation-proton antiporter (CPA) (From Topology)	T: Cation-proton antiporter (CPA)	F: SBF	ECOD (1.6)
B [auth L]	C1-set_4	e7fciL2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_4	ECOD (1.6)
B [auth L]	V-set	e7fciL1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set	ECOD (1.6)
C [auth H]	V-set_8	e7fciH1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
C [auth H]	C1-set_1	e7fciH2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_1	ECOD (1.6)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth L]	Light Chain	IGKV4	Kappa	sodium/bile acid cotransporter	SAbDab (2024-10-25)
C [auth H]	Heavy Chain	IGHV1	-	sodium/bile acid cotransporter	SAbDab (2024-10-25)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
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
A	Sodium/bile acid cotransporter	protein binding binding virus receptor activity exogenous protein binding monoatomic cation transmembrane transporter activity solute:sodium symporter activity solute:monoatomic cation symporter activity organic hydroxy compound transmembrane transporter activity bile acid:sodium symporter activity secondary active transmembrane transporter activity secondary active monocarboxylate transmembrane transporter activity active monoatomic ion transmembrane transporter activity lipid transporter activity inorganic molecular entity transmembrane transporter activity protein binding binding virus receptor activity exogenous protein binding monoatomic cation transmembrane transporter activity solute:sodium symporter activity solute:monoatomic cation symporter activity organic hydroxy compound transmembrane transporter activity bile acid:sodium symporter activity secondary active transmembrane transporter activity secondary active monocarboxylate transmembrane transporter activity active monoatomic ion transmembrane transporter activity lipid transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity transporter activity lipid transmembrane transporter activity monocarboxylate:sodium symporter activity carboxylic acid transmembrane transporter activity sodium ion transmembrane transporter activity organic acid:sodium symporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity monocarboxylic acid transmembrane transporter activity organic acid transmembrane transporter activity metal ion transmembrane transporter activity transmembrane transporter activity symporter activity organic anion transmembrane transporter activity bile acid transmembrane transporter activity	regulation of localization regulation of biological process bile acid secretion organic anion transport carboxylic acid transport regulation of transport transport secretion biological regulation acid secretion establishment of localization regulation of secretion organic acid transport localization monocarboxylic acid transport regulation of localization regulation of biological process bile acid secretion organic anion transport carboxylic acid transport regulation of transport transport secretion biological regulation acid secretion establishment of localization regulation of secretion organic acid transport localization monocarboxylic acid transport regulation of bile acid secretion regulation of organic acid transport cellular response to stimulus regulation of cellular process response to stimulus signaling cellular process bile acid signaling pathway signal transduction cell communication response to hormone response to endogenous stimulus response to chemical response to estrogen cellular response to chemical stimulus cellular response to xenobiotic stimulus response to xenobiotic stimulus response to nutrient levels response to organic cyclic compound lipid localization bile acid and bile salt transport lipid transport organic hydroxy compound transport macromolecule localization response to alcohol response to oxygen-containing compound response to ethanol	cell periphery plasma membrane membrane cellular anatomical entity basal part of cell basal plasma membrane plasma membrane region basolateral plasma membrane
B [auth L]	Fab Light chain	-	-	-
C [auth H]	Fab Heavy chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

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

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q14973	hepatitis B virus infection Liver Cirrhosis, Experimental cholestasis malignant colon neoplasm osteosarcoma lung cancer

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
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
A	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Apical Sodium-Dependent Bile Acid Transporters (ASBT)	sodium taurocholate co-transporting polypeptide (NTCP) transporter

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.