9BIR | pdb_00009bir

Cryo-EM structure of the mammalian peptide transporter PepT2 bound to cefadroxil

External Resource: Annotation

Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	WD40	e9birB1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)
A	WD40	e9birA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B	Heavy Chain	IGHV1	-	solute carrier family 15 member 2	SAbDab (2026-06-05)

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
B	nanobody	-	-	-
A	Solute carrier family 15 member 2	tripeptide transmembrane transporter activity oligopeptide transmembrane transporter activity transporter activity transmembrane transporter activity high-affinity oligopeptide transmembrane transporter activity dipeptide transmembrane transporter activity monoatomic cation transmembrane transporter activity proton 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 high-affinity oligopeptide transmembrane transporter activity dipeptide transmembrane transporter activity monoatomic cation transmembrane transporter activity proton 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 monoatomic ion transmembrane transporter activity symporter activity	multicellular organismal process renal system process system process renal absorption import into cell nitrogen compound transport transport oligopeptide transport import across plasma membrane establishment of localization tripeptide transmembrane transport peptide transport transmembrane transport oligopeptide transmembrane transport multicellular organismal process renal system process system process renal absorption import into cell nitrogen compound transport transport oligopeptide transport import across plasma membrane establishment of localization tripeptide transmembrane transport peptide transport transmembrane transport oligopeptide transmembrane transport localization tripeptide transport oligopeptide import across plasma membrane tripeptide import across plasma membrane cellular process establishment of protein localization protein transport macromolecule localization intracellular protein localization xenobiotic transport cellular response to stimulus positive regulation of response to biotic stimulus regulation of cellular process pattern recognition receptor signaling pathway response to stimulus regulation of signal transduction response to biotic stimulus intracellular signal transduction cell communication immune response-activating signaling pathway positive regulation of immune response regulation of immune system process signal transduction positive regulation of immune system process innate immune response-activating signaling pathway regulation of biological process immune response response to other organism regulation of innate immune response response to external stimulus regulation of response to stimulus defense response to other organism regulation of pattern recognition receptor signaling pathway positive regulation of defense response activation of innate immune response regulation of immune response activation of immune response cytoplasmic pattern recognition receptor signaling pathway regulation of defense response regulation of response to biotic stimulus biological process involved in interspecies interaction between organisms regulation of response to external stimulus intracellular receptor signaling pathway signaling positive regulation of biological process regulation of cytoplasmic pattern recognition receptor signaling pathway positive regulation of response to stimulus positive regulation of response to external stimulus immune response-regulating signaling pathway regulation of intracellular signal transduction regulation of response to stress response to stress innate immune response response to external biotic stimulus nucleotide-binding domain, leucine rich repeat containing receptor signaling pathway regulation of signaling positive regulation of innate immune response defense response regulation of nucleotide-binding domain, leucine rich repeat containing receptor signaling pathway biological regulation defense response to symbiont immune system process regulation of cell communication dipeptide transport peptidoglycan transport carbohydrate derivative transport kidney epithelium development metanephric proximal tubule development nephron tubule development metanephric epithelium development renal system development multicellular organism development metanephros development renal tubule development anatomical structure development nephron development metanephric nephron epithelium development system development nephron epithelium development developmental process epithelium development proximal tubule development tube development metanephric nephron tubule development animal organ development tissue development metanephric tubule development kidney development dipeptide transmembrane transport dipeptide import across plasma membrane antibacterial innate immune response defense response to bacterium response to bacterium	membrane-bounded organelle intracellular anatomical structure membrane intracellular vesicle phagocytic vesicle intracellular membrane-bounded organelle intracellular organelle phagocytic vesicle membrane cellular anatomical structure cytoplasmic vesicle membrane bounding membrane of organelle cytoplasmic vesicle vesicle membrane organelle membrane-bounded organelle intracellular anatomical structure membrane intracellular vesicle phagocytic vesicle intracellular membrane-bounded organelle intracellular organelle phagocytic vesicle membrane cellular anatomical structure cytoplasmic vesicle membrane bounding membrane of organelle cytoplasmic vesicle vesicle membrane organelle endocytic vesicle membrane cytoplasm vesicle organelle membrane endocytic vesicle cell periphery apical part of cell plasma membrane plasma membrane region apical plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR000109	Proton-dependent oligopeptide transporter family	Family
A	IPR029028	Alpha/beta knot methyltransferases	Homologous Superfamily
A	IPR004768	Oligopeptide transporter	Family
A	IPR018456	PTR2 family proton/oligopeptide symporter, conserved site	Conserved Site
A	IPR036259	MFS transporter superfamily	Homologous Superfamily

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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.