7SL9 | pdb_00007sl9

CryoEM structure of SMCT1

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD
Membrane Protein Annotation: mpstruc

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	G-gamma	e7sl9B1	A: alpha bundles	X: RNase A-like	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: G-gamma	ECOD (develop294)
A	G-gamma	e7sl9A1	A: alpha bundles	X: RNase A-like	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: G-gamma	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
A	1.20.1730.10	Mainly Alpha	Up-down Bundle	Sodium/glucose cotransporter	Sodium/glucose cotransporter	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B	Heavy Chain	IGHV1	-	sodium-coupled monocarboxylate transporter 1	SAbDab (2026-03-20)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	nanobody Nb2	-	-	-
A	Sodium-coupled monocarboxylate transporter 1	nicotinate transmembrane transporter activity transporter activity monocarboxylic acid transmembrane transporter activity carboxylic acid transmembrane transporter activity transmembrane transporter activity lipid transporter activity propionate transmembrane transporter activity lipid transmembrane transporter activity fatty acid transmembrane transporter activity short-chain fatty acid transmembrane transporter activity monoatomic cation transmembrane transporter activity solute:sodium symporter activity solute:monoatomic cation symporter activity monocarboxylate:sodium symporter activity nicotinate transmembrane transporter activity transporter activity monocarboxylic acid transmembrane transporter activity carboxylic acid transmembrane transporter activity transmembrane transporter activity lipid transporter activity propionate transmembrane transporter activity lipid transmembrane transporter activity fatty acid transmembrane transporter activity short-chain fatty acid transmembrane transporter activity monoatomic cation transmembrane transporter activity solute:sodium symporter activity solute:monoatomic cation symporter activity monocarboxylate:sodium symporter activity sodium ion transmembrane transporter activity secondary active transmembrane transporter activity secondary active monocarboxylate transmembrane transporter activity organic acid:sodium symporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity metal ion transmembrane transporter activity symporter activity lactate transmembrane transporter activity iodide channel activity monoatomic anion transmembrane transporter activity passive transmembrane transporter activity monoatomic ion channel activity iodide transmembrane transporter activity channel activity monoatomic anion channel activity	localization transport monoatomic anion transport monoatomic ion transport establishment of localization iodide transport inorganic anion transport organic acid transport nitrogen compound transport organic anion transport monocarboxylic acid transport carboxylic acid transport nicotinate transport cellular process localization transport monoatomic anion transport monoatomic ion transport establishment of localization iodide transport inorganic anion transport organic acid transport nitrogen compound transport organic anion transport monocarboxylic acid transport carboxylic acid transport nicotinate transport cellular process apoptotic process cell death programmed cell death acetate transport chloride transport lactate transport organic hydroxy compound transport monoatomic cation transport sodium ion transport metal ion transport pyruvate transport oxoacid metabolic process pyridine-containing compound metabolic process carboxylic acid metabolic process alkaloid metabolic process metabolic process small molecule metabolic process monocarboxylic acid metabolic process organic acid metabolic process nicotinate metabolic process transmembrane transport nitrate transmembrane transport nitrate import carboxylic acid transmembrane transport fatty acid transmembrane transport lipid localization lipid transport short-chain fatty acid transport short-chain fatty acid transmembrane transport fatty acid transport propanoate transmembrane transport macromolecule localization	cell periphery cellular anatomical structure apical part of cell membrane plasma membrane plasma membrane region apical plasma membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space cell periphery cellular anatomical structure apical part of cell membrane plasma membrane plasma membrane region apical plasma membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space vesicle extracellular membrane-bounded organelle GINS complex DNA replication preinitiation complex protein-containing complex intracellular anatomical structure protein-DNA complex nucleus membrane-enclosed lumen nuclear protein-containing complex nuclear chromosome intracellular membraneless organelle chromosome intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen membraneless organelle nuclear lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR041992	SMCT1, solute-binding domain	Domain
A	IPR038377	Sodium/glucose symporter superfamily	Homologous Superfamily
A	IPR001734	Sodium/solute symporter	Family
A	IPR051163	Sodium:Solute Symporter (SSF)	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q8N695	hyperuricemia malignant colon neoplasm benign colon neoplasm lung carcinoma colonic neoplasm

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A	OPM	Transmembrane	Alpha-helical polytopic	APC (Amino acid-Polyamine-organoCation) superfamily	Solute:sodium symporter

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

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

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

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

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Solute Sodium Symporter (SSS) Family	SMCT1 Sodium-monocarboxylate 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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.

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