Annotations: 8B1J

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 (2025-03-21)

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
A	Dipeptide and tripeptide permease B	tripeptide transmembrane transporter activity oligopeptide transmembrane transporter activity amide transmembrane transporter activity transporter activity transmembrane transporter activity dipeptide transmembrane transporter activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity solute:monoatomic cation symporter activity peptide transmembrane transporter activity peptide:proton symporter activity tripeptide transmembrane transporter activity oligopeptide transmembrane transporter activity amide transmembrane transporter activity transporter activity transmembrane transporter activity dipeptide transmembrane transporter activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation 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	transport proton transmembrane transport monoatomic ion transmembrane transport inorganic ion transmembrane transport establishment of localization inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization monoatomic ion transport cellular process monoatomic cation transport nitrogen compound transport oligopeptide transport transport proton transmembrane transport monoatomic ion transmembrane transport inorganic ion transmembrane transport establishment of localization inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization monoatomic ion transport cellular process monoatomic cation transport nitrogen compound transport oligopeptide transport peptide transport oligopeptide transmembrane transport dipeptide transport amide transport dipeptide transmembrane transport protein localization establishment of protein localization cellular localization protein transport cellular macromolecule localization macromolecule localization tripeptide transmembrane transport tripeptide transport	cell periphery cellular anatomical structure plasma membrane membrane
B	Nanobody 132	-	-	-
C	SER-LEU	-	-	-

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: 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.