Annotations: 8JA3

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth M], H [auth L]	Light Chain	IGKV1	Kappa	beta-arrestin-1 \| c3a anaphylatoxin chemotactic receptor	SAbDab (2026-02-06)
C [auth I], G [auth H]	Heavy Chain	IGHV3	-	beta-arrestin-1 \| c3a anaphylatoxin chemotactic receptor	SAbDab (2026-02-06)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], E [auth A]	PF00339	Arrestin (or S-antigen), N-terminal domain (Arrestin_N)	Arrestin (or S-antigen), N-terminal domain	Ig-like beta-sandwich fold. Scop reports duplication with C-terminal domain.	Domain
A [auth B], E [auth A]	PF02752	Arrestin (or S-antigen), C-terminal domain (Arrestin_C)	Arrestin (or S-antigen), C-terminal domain	Ig-like beta-sandwich fold. Scop reports duplication with N-terminal domain.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D [auth M], H [auth L]	Fab30 light chain	-	-	-
C [auth I], G [auth H]	Fab30 heavy chain	-	-	-
B [auth U], F [auth V]	C3a anaphylatoxin chemotactic receptor	complement component C3a receptor activity molecular transducer activity complement receptor activity transmembrane signaling receptor activity signaling receptor activity immune receptor activity opsonin receptor activity complement component C5a receptor activity G protein-coupled receptor activity	cellular response to stimulus positive regulation of locomotion regulation of cell motility regulation of cellular process response to stimulus macrophage migration positive regulation of chemotaxis positive regulation of cell migration taxis cell migration regulation of immune system process regulation of mononuclear cell migration positive regulation of immune system process chemotaxis cellular response to stimulus positive regulation of locomotion regulation of cell motility regulation of cellular process response to stimulus macrophage migration positive regulation of chemotaxis positive regulation of cell migration taxis cell migration regulation of immune system process regulation of mononuclear cell migration positive regulation of immune system process chemotaxis regulation of biological process regulation of leukocyte chemotaxis regulation of leukocyte migration positive regulation of macrophage migration response to external stimulus positive regulation of leukocyte chemotaxis granulocyte migration leukocyte migration regulation of response to stimulus response to chemical regulation of locomotion regulation of response to external stimulus macrophage chemotaxis positive regulation of biological process positive regulation of response to stimulus regulation of granulocyte chemotaxis regulation of macrophage migration positive regulation of response to external stimulus positive regulation of cell motility regulation of cell migration myeloid leukocyte migration positive regulation of mononuclear cell migration cell motility locomotion positive regulation of cellular process cell chemotaxis regulation of macrophage chemotaxis biological regulation positive regulation of leukocyte migration regulation of chemotaxis cellular response to chemical stimulus immune system process granulocyte chemotaxis mononuclear cell migration positive regulation of macrophage chemotaxis cellular process leukocyte chemotaxis positive regulation of cytosolic calcium ion concentration regulation of biological quality multicellular organismal process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process regulation of cytokine production cytokine production regulation of multicellular organismal process positive regulation of macromolecule metabolic process regulation of vascular endothelial growth factor production regulation of biosynthetic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression vascular endothelial growth factor production biosynthetic process positive regulation of gene expression positive regulation of multicellular organismal process positive regulation of vascular endothelial growth factor production regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process positive regulation of cytokine production regulation of metabolic process regulation of developmental process angiogenesis regulation of vasculature development positive regulation of developmental process multicellular organism development tube morphogenesis anatomical structure development regulation of anatomical structure morphogenesis blood vessel development system development developmental process regulation of multicellular organismal development blood vessel morphogenesis tube development positive regulation of angiogenesis vasculature development circulatory system development anatomical structure morphogenesis positive regulation of vasculature development regulation of angiogenesis anatomical structure formation involved in morphogenesis signaling phospholipase C-activating G protein-coupled receptor signaling pathway cell communication G protein-coupled receptor signaling pathway signal transduction adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway adenylate cyclase-modulating G protein-coupled receptor signaling pathway immune response-regulating cell surface receptor signaling pathway complement receptor mediated signaling pathway immune response-activating signaling pathway immune response-regulating signaling pathway positive regulation of immune response cell surface receptor signaling pathway immune response-activating cell surface receptor signaling pathway immune response regulation of immune response activation of immune response defense response response to stress inflammatory response positive regulation of neutrophil chemotaxis neutrophil migration positive regulation of granulocyte chemotaxis regulation of neutrophil chemotaxis regulation of neutrophil migration neutrophil chemotaxis positive regulation of neutrophil migration intracellular signal transduction calcium-mediated signaling intracellular signaling cassette system process circulatory system process blood circulation	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 lytic vacuole lysosome vacuolar membrane azurophil granule vacuole lytic vacuole membrane lysosomal membrane primary lysosome azurophil granule membrane cell periphery plasma membrane
A [auth B], E [auth A]	Beta-arrestin-1	enzyme regulator activity molecular function inhibitor activity peptidase regulator activity molecular function regulator activity enzyme inhibitor activity cysteine-type endopeptidase inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity phosphoprotein binding protein binding binding kinase binding enzyme binding enzyme regulator activity molecular function inhibitor activity peptidase regulator activity molecular function regulator activity enzyme inhibitor activity cysteine-type endopeptidase inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity phosphoprotein binding protein binding binding kinase binding enzyme binding protein kinase binding mitogen-activated protein kinase kinase binding arrestin family protein binding protein-containing complex binding AP-2 adaptor complex binding GTPase regulator activity enzyme activator activity GTPase activator activity molecular function activator activity nucleoside-triphosphatase regulator activity protein phosphorylated amino acid binding angiotensin receptor binding signaling receptor binding G protein-coupled receptor binding molecular adaptor activity ubiquitin protein ligase binding ubiquitin-like protein ligase binding insulin-like growth factor receptor binding clathrin binding adrenergic receptor binding alpha-1B adrenergic receptor binding transcription coactivator activity transcription regulator activity transcription coregulator activity protein-macromolecule adaptor activity transmembrane transporter binding alpha-1A adrenergic receptor binding cargo adaptor activity clathrin-cargo adaptor activity follicle-stimulating hormone receptor binding vasopressin receptor binding V2 vasopressin receptor binding transcription factor binding RNA polymerase II-specific DNA-binding transcription factor binding nuclear receptor binding DNA-binding transcription factor binding nuclear estrogen receptor binding	response to stimulus response to chemical response to xenobiotic stimulus interleukin-6 production multicellular organismal process regulation of cellular process negative regulation of biological process regulation of interleukin-6 production regulation of cytokine production cytokine production negative regulation of cellular process regulation of multicellular organismal process negative regulation of macromolecule metabolic process regulation of biosynthetic process response to stimulus response to chemical response to xenobiotic stimulus interleukin-6 production multicellular organismal process regulation of cellular process negative regulation of biological process regulation of interleukin-6 production regulation of cytokine production cytokine production negative regulation of cellular process regulation of multicellular organismal process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of biological process negative regulation of metabolic process biological regulation negative regulation of cytokine production regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression negative regulation of interleukin-6 production negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process negative regulation of multicellular organismal process regulation of metabolic process negative regulation of post-translational protein modification regulation of protein modification process regulation of protein ubiquitination regulation of primary metabolic process protein ubiquitination negative regulation of protein modification process protein metabolic process negative regulation of protein ubiquitination regulation of protein modification by small protein conjugation or removal protein modification process negative regulation of protein metabolic process negative regulation of protein modification by small protein conjugation or removal regulation of post-translational protein modification regulation of protein metabolic process primary metabolic process macromolecule modification post-translational protein modification protein modification by small protein conjugation protein modification by small protein conjugation or removal actomyosin structure organization actin cytoskeleton organization actin filament organization cellular component organization cellular component biogenesis organelle organization cellular component assembly actin filament bundle organization contractile actin filament bundle assembly actin filament-based process actin filament bundle assembly stress fiber assembly cellular component organization or biogenesis supramolecular fiber organization cytoskeleton organization regulation of apoptotic process apoptotic process regulation of programmed cell death cell death programmed cell death cellular response to stimulus negative adaptation of signaling pathway negative regulation of signaling signaling desensitization of G protein-coupled receptor signaling pathway regulation of signal transduction negative regulation of G protein-coupled receptor signaling pathway negative regulation of cell communication cell communication signal transduction regulation of G protein-coupled receptor signaling pathway regulation of signaling negative regulation of response to stimulus negative regulation of signal transduction regulation of response to stimulus adaptation of signaling pathway regulation of cell communication G protein-coupled receptor signaling pathway negative regulation of intracellular signal transduction intracellular signal transduction regulation of intracellular signal transduction intracellular signaling cassette regulation of MAPK cascade negative regulation of ERK1 and ERK2 cascade MAPK cascade ERK1 and ERK2 cascade regulation of ERK1 and ERK2 cascade negative regulation of MAPK cascade ovulation cycle process reproductive process sex differentiation development of primary female sexual characteristics developmental process involved in reproduction ovulation cycle multicellular organism development development of primary sexual characteristics anatomical structure development reproductive structure development ovarian follicle development system development rhythmic process developmental process gonad development reproductive system development female gonad development multicellular organismal reproductive process animal organ development female sex differentiation follicle-stimulating hormone signaling pathway regulation of inositol phosphate biosynthetic process regulation of inositol trisphosphate biosynthetic process alcohol metabolic process inositol phosphate metabolic process regulation of small molecule metabolic process phosphate-containing compound metabolic process polyol biosynthetic process inositol trisphosphate metabolic process small molecule metabolic process phosphorus metabolic process regulation of carbohydrate metabolic process carbohydrate metabolic process polyol metabolic process regulation of alcohol biosynthetic process small molecule biosynthetic process inositol trisphosphate biosynthetic process carbohydrate biosynthetic process organophosphate metabolic process organophosphate biosynthetic process inositol phosphate biosynthetic process alcohol biosynthetic process regulation of phosphorus metabolic process regulation of carbohydrate biosynthetic process system process sensory perception nervous system process catabolic process protein catabolic process macromolecule catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process ubiquitin-dependent protein catabolic process RNA metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process nucleobase-containing compound biosynthetic process nucleic acid metabolic process regulation of DNA-templated transcription response to morphine response to isoquinoline alkaloid response to nitrogen compound response to alkaloid negative regulation of interleukin-8 production interleukin-8 production regulation of interleukin-8 production positive regulation of DNA-templated transcription positive regulation of biological process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process transcription by RNA polymerase II positive regulation of biosynthetic process positive regulation of macromolecule metabolic process positive regulation of cellular process regulation of transcription by RNA polymerase II positive regulation of transcription by RNA polymerase II positive regulation of RNA metabolic process positive regulation of RNA biosynthetic process import into cell receptor internalization transport vesicle-mediated transport localization G protein-coupled receptor internalization establishment of localization receptor-mediated endocytosis endocytosis positive regulation of cell communication positive regulation of signal transduction positive regulation of response to stimulus positive regulation of ERK1 and ERK2 cascade positive regulation of MAPK cascade positive regulation of intracellular signal transduction positive regulation of signaling negative regulation of programmed cell death negative regulation of apoptotic process establishment of protein localization protein transport macromolecule localization intracellular protein localization regulation of localization regulation of cellular component organization positive regulation of cellular component organization regulation of receptor internalization positive regulation of endocytosis positive regulation of receptor-mediated endocytosis regulation of endocytosis regulation of transport regulation of receptor-mediated endocytosis regulation of vesicle-mediated transport positive regulation of receptor internalization positive regulation of transport small GTPase-mediated signal transduction regulation of small GTPase mediated signal transduction Rho protein signal transduction regulation of Rho protein signal transduction positive regulation of Rho protein signal transduction positive regulation of small GTPase mediated signal transduction adenylate cyclase-modulating G protein-coupled receptor signaling pathway positive regulation of protein metabolic process positive regulation of post-translational protein modification positive regulation of protein modification process positive regulation of protein modification by small protein conjugation or removal positive regulation of protein ubiquitination neuron apoptotic process negative regulation of neuron apoptotic process regulation of neuron apoptotic process proteasomal protein catabolic process proteasome-mediated ubiquitin-dependent protein catabolic process cell surface receptor signaling pathway Notch signaling pathway negative regulation of Notch signaling pathway regulation of Notch signaling pathway cell population proliferation positive regulation of cell population proliferation regulation of cell population proliferation sensory perception of touch sensory perception of mechanical stimulus nitrogen compound transport positive regulation of establishment of protein localization carbohydrate homeostasis establishment of localization in cell positive regulation of insulin secretion involved in cellular response to glucose stimulus positive regulation of insulin secretion regulation of biological quality regulation of peptide hormone secretion regulation of hormone levels positive regulation of peptide hormone secretion establishment of protein localization to extracellular region intracellular glucose homeostasis protein secretion cellular response to oxygen-containing compound regulation of protein secretion regulation of secretion cellular response to carbohydrate stimulus chemical homeostasis response to glucose glucose homeostasis positive regulation of protein localization insulin secretion involved in cellular response to glucose stimulus cellular localization regulation of hormone secretion regulation of protein localization regulation of peptide secretion homeostatic process positive regulation of secretion by cell hormone secretion protein localization to extracellular region positive regulation of protein transport peptide secretion regulation of secretion by cell secretion by cell positive regulation of hormone secretion response to monosaccharide response to carbohydrate positive regulation of secretion signal release cellular response to hexose stimulus intracellular chemical homeostasis cellular response to monosaccharide stimulus positive regulation of peptide secretion secretion regulation of peptide transport regulation of establishment of protein localization export from cell cell-cell signaling response to oxygen-containing compound cellular response to glucose stimulus regulation of protein transport positive regulation of protein secretion peptide transport response to hexose cellular response to chemical stimulus cellular homeostasis regulation of cellular localization regulation of insulin secretion peptide hormone secretion regulation of insulin secretion involved in cellular response to glucose stimulus hormone transport insulin secretion phototransduction detection of light stimulus response to light stimulus detection of external stimulus response to external stimulus detection of abiotic stimulus detection of stimulus response to abiotic stimulus response to radiation positive regulation of phosphorylation regulation of protein phosphorylation positive regulation of phosphate metabolic process positive regulation of protein phosphorylation protein phosphorylation positive regulation of phosphorus metabolic process phosphorylation regulation of phosphorylation	cell projection cellular anatomical structure pseudopodium plasma membrane bounded cell projection cell periphery postsynapse postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane clathrin-coated pit cell projection cellular anatomical structure pseudopodium plasma membrane bounded cell projection cell periphery postsynapse postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane clathrin-coated pit endomembrane system intracellular anatomical structure cytoplasm cytosol basal part of cell basal plasma membrane basolateral plasma membrane intracellular organelle organelle membraneless organelle intracellular membraneless organelle chromatin chromosome glutamatergic synapse neuron spine neuron projection dendritic spine somatodendritic compartment dendrite dendritic tree membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen cytoplasmic vesicle intracellular vesicle vesicle endosome postsynaptic density neuron to neuron synapse postsynaptic specialization asymmetric synapse nuclear body

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth U], F [auth V]	IPR002234	Anaphylatoxin chemotactic receptor, C3a/C5a1/C5a2	Family
B [auth U], F [auth V]	IPR000826	Formyl peptide receptor-related	Family
B [auth U], F [auth V]	IPR000276	G protein-coupled receptor, rhodopsin-like	Family
B [auth U], F [auth V]	IPR001644	C3a anaphylatoxin chemotactic receptor	Family
B [auth U], F [auth V]	IPR017452	GPCR, rhodopsin-like, 7TM	Domain
A [auth B], E [auth A]	IPR011022	Arrestin-like, C-terminal domain	Domain
A [auth B], E [auth A]	IPR000698	Arrestin	Family
A [auth B], E [auth A]	IPR014753	Arrestin, N-terminal	Homologous Superfamily
A [auth B], E [auth A]	IPR014756	Immunoglobulin E-set	Homologous Superfamily
A [auth B], E [auth A]	IPR014752	Arrestin-like, C-terminal domain superfamily	Homologous Superfamily
A [auth B], E [auth A]	IPR011021	Arrestin-like, N-terminal	Domain
A [auth B], E [auth A]	IPR017864	Arrestin, conserved site	Conserved Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B [auth U], F [auth V]	Pharos: Q16581	subependymal giant cell astrocytoma astrocytic tumor glioblastoma interstitial cystitis lung cancer MALT lymphoma osteosarcoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia tuberculosis complement component 3 deficiency hemolytic uremic syndrome, atypical, susceptibility to, 1 invasive ductal breast carcinoma lung carcinoma medulloblastoma ovarian cancer subependymal giant cell astrocytoma astrocytic tumor glioblastoma interstitial cystitis lung cancer MALT lymphoma osteosarcoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia tuberculosis complement component 3 deficiency hemolytic uremic syndrome, atypical, susceptibility to, 1 invasive ductal breast carcinoma lung carcinoma medulloblastoma ovarian cancer pilocytic astrocytoma ulcerative colitis cutaneous lupus erythematosus hepatocellular carcinoma large cell medulloblastoma malignant mesothelioma non-small cell lung carcinoma pancreatic intraductal papillary-mucinous carcinoma

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
B [auth U], F [auth V]	SEP	Parent Component: SER RESID: AA0037 PSI-MOD : O-phospho-L-serine MOD:00046
B [auth U], F [auth V]	TPO	Parent Component: THR RESID: AA0037 , AA0038 PSI-MOD : O-phospho-L-serine MOD:00046 , O-phospho-L-threonine MOD:00047

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.