Annotations: 9IRB

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth H]	Heavy Chain	IGHV1	-	solute carrier family 15 member 4	SAbDab (2026-01-16)
C [auth L]	Light Chain	IGKV6	Kappa	solute carrier family 15 member 4	SAbDab (2026-01-16)

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	Solute carrier family 15 member 4	carbohydrate derivative transmembrane transporter activity macromolecule transmembrane transporter activity peptidoglycan transmembrane transporter activity transporter activity transmembrane transporter activity dipeptide transmembrane transporter activity oligopeptide transmembrane transporter activity amide transmembrane transporter activity L-amino acid transmembrane transporter activity amino acid transmembrane transporter activity aromatic amino acid transmembrane transporter activity azole transmembrane transporter activity carboxylic acid transmembrane transporter activity basic amino acid transmembrane transporter activity carbohydrate derivative transmembrane transporter activity macromolecule transmembrane transporter activity peptidoglycan transmembrane transporter activity transporter activity transmembrane transporter activity dipeptide transmembrane transporter activity oligopeptide transmembrane transporter activity amide transmembrane transporter activity L-amino acid transmembrane transporter activity amino acid transmembrane transporter activity aromatic amino acid transmembrane transporter activity azole transmembrane transporter activity carboxylic acid transmembrane transporter activity basic amino acid transmembrane transporter activity L-histidine 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 multicellular organismal-level homeostasis mast cell homeostasis leukocyte homeostasis homeostatic process immune system process homeostasis of number of cells myeloid cell homeostasis cellular response to stimulus positive regulation of cell communication positive regulation of response to biotic stimulus regulation of toll-like receptor 9 signaling pathway regulation of cellular process positive regulation of signal transduction multicellular organismal process multicellular organismal-level homeostasis mast cell homeostasis leukocyte homeostasis homeostatic process immune system process homeostasis of number of cells myeloid cell homeostasis cellular response to stimulus positive regulation of cell communication positive regulation of response to biotic stimulus regulation of toll-like receptor 9 signaling pathway regulation of cellular process positive regulation of signal transduction 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 positive regulation of pattern recognition receptor signaling pathway immune response response to other organism regulation of innate immune response response to external stimulus positive regulation of intracellular signal transduction regulation of response to stimulus defense response to other organism regulation of pattern recognition receptor signaling pathway positive regulation of defense response toll-like receptor 9 signaling pathway 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 endolysosomal toll-like receptor signaling pathway 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 positive regulation of toll-like receptor 9 signaling pathway positive regulation of cellular process regulation of signaling positive regulation of innate immune response defense response biological regulation defense response to symbiont regulation of cell communication cellular process positive regulation of signaling localization transport monoatomic ion transport establishment of localization establishment of protein localization nitrogen compound transport protein transport macromolecule localization intracellular protein localization nucleotide-binding domain, leucine rich repeat containing receptor signaling pathway regulation of nucleotide-binding domain, leucine rich repeat containing receptor signaling pathway peptidoglycan transport carbohydrate derivative transport toll-like receptor 7 signaling pathway regulation of toll-like receptor 7 signaling pathway positive regulation of toll-like receptor 7 signaling pathway positive regulation of nucleotide-binding domain, leucine rich repeat containing receptor signaling pathway regulation of nucleotide-binding oligomerization domain containing 2 signaling pathway nucleotide-binding oligomerization domain containing 2 signaling pathway positive regulation of nucleotide-binding oligomerization domain containing 2 signaling pathway import into cell oligopeptide transport import across plasma membrane peptide transport transmembrane transport oligopeptide transmembrane transport dipeptide transport oligopeptide import across plasma membrane amide transport dipeptide transmembrane transport dipeptide import across plasma membrane L-histidine transport aromatic amino acid transport carboxylic acid transmembrane transport amino acid transmembrane transport L-amino acid transport azole transmembrane transport vacuolar transmembrane transport L-histidine transmembrane transport organic anion transport carboxylic acid transport organic cation transport basic amino acid transmembrane transport organic acid transport amino acid transport L-histidine transmembrane export from vacuole basic amino acid transport L-alpha-amino acid transmembrane transport amino acid transmembrane export from vacuole toll-like receptor 8 signaling pathway positive regulation of toll-like receptor 8 signaling pathway regulation of toll-like receptor 8 signaling pathway histidine transport positive regulation of nucleotide-binding oligomerization domain containing 1 signaling pathway nucleotide-binding oligomerization domain containing 1 signaling pathway regulation of nucleotide-binding oligomerization domain containing 1 signaling pathway adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity regulation of immune effector process regulation of DNA recombination regulation of leukocyte activation regulation of cell activation B cell activation involved in immune response cell activation involved in immune response regulation of primary metabolic process nucleobase-containing compound metabolic process multicellular organism development anatomical structure development leukocyte mediated immunity somatic diversification of immune receptors regulation of nucleobase-containing compound metabolic process somatic recombination of immunoglobulin genes involved in immune response system development developmental process regulation of adaptive immune response DNA recombination primary metabolic process DNA metabolic process regulation of B cell mediated immunity immune effector process somatic diversification of immunoglobulins regulation of gene expression regulation of leukocyte mediated immunity biosynthetic process B cell mediated immunity regulation of macromolecule biosynthetic process metabolic process regulation of production of molecular mediator of immune response macromolecule metabolic process regulation of metabolic process regulation of DNA metabolic process isotype switching immune system development immunoglobulin production immunoglobulin production involved in immunoglobulin-mediated immune response somatic cell DNA recombination lymphocyte activation leukocyte activation somatic diversification of immunoglobulins involved in immune response somatic recombination of immunoglobulin gene segments regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains regulation of immunoglobulin mediated immune response regulation of B cell activation leukocyte activation involved in immune response regulation of multicellular organismal process lymphocyte activation involved in immune response regulation of biosynthetic process production of molecular mediator of immune response regulation of isotype switching B cell activation cell activation regulation of macromolecule metabolic process gene expression adaptive immune response immunoglobulin mediated immune response macromolecule biosynthetic process regulation of isotype switching to IgG isotypes nucleic acid metabolic process regulation of lymphocyte mediated immunity regulation of immunoglobulin production isotype switching to IgG isotypes somatic diversification of immune receptors via germline recombination within a single locus regulation of lymphocyte activation	membrane-bounded organelle intracellular anatomical structure membrane intracellular vesicle intracellular membrane-bounded organelle endomembrane system specific granule membrane intracellular organelle cytoplasmic vesicle membrane cellular anatomical structure bounding membrane of organelle vesicle membrane cytoplasmic vesicle organelle membrane-bounded organelle intracellular anatomical structure membrane intracellular vesicle intracellular membrane-bounded organelle endomembrane system specific granule membrane intracellular organelle cytoplasmic vesicle membrane cellular anatomical structure bounding membrane of organelle vesicle membrane cytoplasmic vesicle organelle secretory granule secretory vesicle cytoplasm vesicle organelle membrane secretory granule membrane specific granule endosome membrane endolysosome membrane lytic vacuole endolysosome lysosome vacuolar membrane endosome vacuole lytic vacuole membrane lysosomal membrane cell periphery plasma membrane early endosome early endosome membrane
B [auth H]	Fab107 heavy chain	-	-	-
C [auth L]	Fab107 light chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
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

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q8N697	systemic lupus erythematosus Libman-Sacks Disease pancreatic ductal adenocarcinoma pilocytic astrocytoma ovarian cancer

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

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

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.