8B1B | pdb_00008b1b

DtpB-Nb132-AL

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
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		e8b1bB1	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: Ku_PK_bind	F:	ECOD (20:10:01)
A		e8b1bA1	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: Ku_PK_bind	F:	ECOD (20:10:01)

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)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B	Heavy Chain	IGHV1	-	dipeptide and tripeptide permease b	SAbDab (2026-03-13)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00854	POT family (PTR2)	POT family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C	ALA-LEU	-	-	-
B	Nanobody 132	-	-	-
A	Dipeptide and tripeptide permease B	tripeptide transmembrane transporter activity oligopeptide transmembrane transporter activity transporter activity transmembrane transporter activity dipeptide transmembrane transporter activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity monoatomic ion transmembrane transporter activity solute:monoatomic cation symporter activity peptide transmembrane transporter activity peptide:proton symporter activity secondary active transmembrane transporter activity active transmembrane transporter activity solute:proton symporter activity tripeptide transmembrane transporter activity oligopeptide transmembrane transporter activity transporter activity transmembrane transporter activity dipeptide transmembrane transporter activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity monoatomic ion transmembrane transporter activity solute:monoatomic cation symporter activity peptide transmembrane transporter activity peptide:proton symporter activity secondary active transmembrane transporter activity active transmembrane transporter activity solute:proton symporter activity symporter activity	monoatomic cation transmembrane transport transmembrane transport localization transport proton transmembrane transport monoatomic ion transmembrane transport monoatomic ion transport cellular process monoatomic cation transport establishment of localization nitrogen compound transport oligopeptide transport peptide transport oligopeptide transmembrane transport monoatomic cation transmembrane transport transmembrane transport localization transport proton transmembrane transport monoatomic ion transmembrane transport monoatomic ion transport cellular process monoatomic cation transport establishment of localization nitrogen compound transport oligopeptide transport peptide transport oligopeptide transmembrane transport dipeptide transport dipeptide transmembrane transport establishment of protein localization protein transport macromolecule localization intracellular protein localization tripeptide transmembrane transport tripeptide transport	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR050171	Major Facilitator Superfamily (MFS) Transporters	Family
A	IPR005279	Dipeptide/tripeptide permease	Family
A	IPR023778	Amino acid/peptide transporter family, dipeptide/tripeptide permease B	Family
A	IPR000109	Proton-dependent oligopeptide transporter family	Family
A	IPR018456	PTR2 family proton/oligopeptide symporter, conserved site	Conserved Site
A	IPR036259	MFS transporter superfamily	Homologous Superfamily

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	Major Facilitator Superfamily (MFS) Transporters	DtpB dipeptide and tripeptide permease B (POT family) with bound ALA-TRP-ALA

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.