Annotations: 8WU1

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D [auth R]	SCOP2B Superfamily	G protein-coupled receptor-like	8091168	3000473	SCOP2B (2022-06-29)
D [auth R]	SCOP2B Superfamily	G protein-coupled receptor-like	8091168	3000473	SCOP2B (2022-06-29)
A [auth C]	SCOP2B Superfamily	Arrestin/Vps26-like	8055051	3002071	SCOP2B (2022-06-29)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth L]	Light Chain	IGKV1	Kappa	beta-arrestin-1 \| cannabinoid receptor 1,vasopressin v2 receptor	SAbDab (2025-11-28)
B [auth H]	Heavy Chain	IGHV3	-	beta-arrestin-1 \| cannabinoid receptor 1,vasopressin v2 receptor	SAbDab (2025-11-28)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
D [auth R]	PF00001	7 transmembrane receptor (rhodopsin family) (7tm_1)	7 transmembrane receptor (rhodopsin family)	This family contains, amongst other G-protein-coupled receptors (GCPRs), members of the opsin family, which have been considered to be typical members of the rhodopsin superfamily. They share several motifs, mainly the seven transmembrane helices, GC ...	This family contains, amongst other G-protein-coupled receptors (GCPRs), members of the opsin family, which have been considered to be typical members of the rhodopsin superfamily. They share several motifs, mainly the seven transmembrane helices, GCPRs of the rhodopsin superfamily. All opsins bind a chromophore, such as 11-cis-retinal. The function of most opsins other than the photoisomerases is split into two steps: light absorption and G-protein activation. Photoisomerases, on the other hand, are not coupled to G-proteins - they are thought to generate and supply the chromophore that is used by visual opsins [1].	Domain
A [auth C]	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 C]	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 R]	Cannabinoid receptor 1,Vasopressin V2 receptor	molecular transducer activity G protein-coupled receptor activity transmembrane signaling receptor activity signaling receptor activity cannabinoid receptor activity identical protein binding protein binding binding vasopressin receptor activity peptide receptor activity G protein-coupled peptide receptor activity	cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus signaling biological regulation cannabinoid signaling pathway cell communication G protein-coupled receptor signaling pathway cellular process signal transduction adenylate cyclase-modulating G protein-coupled receptor signaling pathway adenylate cyclase-activating G protein-coupled receptor signaling pathway metabolic process cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus signaling biological regulation cannabinoid signaling pathway cell communication G protein-coupled receptor signaling pathway cellular process signal transduction adenylate cyclase-modulating G protein-coupled receptor signaling pathway adenylate cyclase-activating G protein-coupled receptor signaling pathway metabolic process regulation of metabolic process trans-synaptic signaling trans-synaptic signaling by endocannabinoid retrograde trans-synaptic signaling cell-cell signaling retrograde trans-synaptic signaling by endocannabinoid synaptic signaling trans-synaptic signaling by lipid retrograde trans-synaptic signaling by lipid multicellular organismal process neuron recognition cellular developmental process cell projection organization cell development neuron projection development neuron projection fasciculation cellular component organization neurogenesis multicellular organism development neuron differentiation axonal fasciculation cell differentiation anatomical structure development cell recognition cellular component organization or biogenesis system development developmental process plasma membrane bounded cell projection organization nervous system development axon development generation of neurons neuron development inorganic ion homeostasis intracellular calcium ion homeostasis homeostatic process calcium ion homeostasis regulation of cytosolic calcium ion concentration regulation of presynaptic cytosolic calcium ion concentration cellular homeostasis neuron cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis glucose homeostasis carbohydrate homeostasis G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger regulation of body fluid levels hemostasis regulation of biological quality regulation of tube diameter system process regulation of tube size regulation of system process positive regulation of biological process positive regulation of vasoconstriction circulatory system process regulation of blood circulation vascular process in circulatory system regulation of vasoconstriction positive regulation of multicellular organismal process regulation of multicellular organismal process blood vessel diameter maintenance vasoconstriction blood circulation regulation of anatomical structure size regulation of biosynthetic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process positive regulation of macromolecule biosynthetic process regulation of gene expression positive regulation of metabolic process biosynthetic process positive regulation of gene expression positive regulation of biosynthetic process regulation of macromolecule biosynthetic process positive regulation of macromolecule metabolic process macromolecule metabolic process positive regulation of cellular process cellular response to endogenous stimulus cellular response to chemical stimulus response to hormone response to endogenous stimulus response to chemical cellular response to hormone stimulus response to peptide response to cytokine regulation of systemic arterial blood pressure by hormone regulation of systemic arterial blood pressure mediated by a chemical signal regulation of blood pressure regulation of systemic arterial blood pressure endocrine process regulation of systemic arterial blood pressure by vasopressin cell population proliferation positive regulation of cell population proliferation regulation of cell population proliferation positive regulation of cell communication regulation of signaling positive regulation of signal transduction positive regulation of intracellular signal transduction regulation of signal transduction intracellular signal transduction positive regulation of response to stimulus regulation of intracellular signal transduction regulation of response to stimulus regulation of cell communication positive regulation of signaling renal system process regulation of urine volume renal water retention negative regulation of urine volume head development forebrain development animal organ development brain development central nervous system development telencephalon development negative regulation of cell population proliferation negative regulation of cellular process negative regulation of biological process positive regulation of adenylate cyclase activity positive regulation of molecular function regulation of molecular function positive regulation of cyclase activity activation of adenylate cyclase activity regulation of adenylate cyclase activity regulation of catalytic activity positive regulation of catalytic activity positive regulation of lyase activity positive regulation of systemic arterial blood pressure positive regulation of blood pressure	intracellular organelle cellular anatomical structure intracellular anatomical structure cytoskeleton organelle membraneless organelle intracellular membraneless organelle actin cytoskeleton cell periphery plasma membrane membrane presynapse synapse cell junction intracellular organelle cellular anatomical structure intracellular anatomical structure cytoskeleton organelle membraneless organelle intracellular membraneless organelle actin cytoskeleton cell periphery plasma membrane membrane presynapse synapse cell junction presynaptic membrane plasma membrane region synaptic membrane membrane microdomain membrane raft cytoplasm growth cone axon cell projection distal axon neuron projection plasma membrane bounded cell projection site of polarized growth GABA-ergic synapse glutamatergic synapse membrane-bounded organelle mitochondrial membrane mitochondrion organelle outer membrane intracellular membrane-bounded organelle organelle envelope bounding membrane of organelle mitochondrial envelope mitochondrial outer membrane outer membrane organelle membrane intracellular vesicle cytoplasmic vesicle vesicle membrane clathrin-coated vesicle endocytic vesicle membrane coated vesicle vesicle endocytic vesicle clathrin-coated vesicle membrane clathrin-coated endocytic vesicle membrane clathrin-coated endocytic vesicle cytoplasmic vesicle membrane coated vesicle membrane Golgi apparatus endomembrane system endosome perinuclear region of cytoplasm endoplasmic reticulum
C [auth L]	Fab30 light chain	-	-	-
B [auth H]	Fab30 heavy chain	-	-	-
A [auth C]	Beta-arrestin-1	clathrin binding protein binding binding protein-containing complex binding AP-2 adaptor complex binding clathrin heavy chain binding signaling receptor binding acetylcholine receptor binding small molecule binding ion binding phosphatidylinositol-3,4,5-trisphosphate binding anion binding phospholipid binding lipid binding clathrin binding protein binding binding protein-containing complex binding AP-2 adaptor complex binding clathrin heavy chain binding signaling receptor binding acetylcholine receptor binding small molecule binding ion binding phosphatidylinositol-3,4,5-trisphosphate binding anion binding phospholipid binding lipid binding phosphatidylinositol phosphate binding phosphatidylinositol binding molecular adaptor activity G protein-coupled receptor binding inositol hexakisphosphate binding alcohol binding	cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus positive regulation of ERK1 and ERK2 cascade regulation of intracellular signal transduction intracellular signaling cassette cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus positive regulation of ERK1 and ERK2 cascade regulation of intracellular signal transduction intracellular signaling cassette signal transduction positive regulation of cellular process regulation of biological process regulation of signaling positive regulation of MAPK cascade biological regulation positive regulation of intracellular signal transduction regulation of MAPK cascade regulation of response to stimulus MAPK cascade regulation of cell communication cellular process ERK1 and ERK2 cascade regulation of ERK1 and ERK2 cascade positive regulation of signaling localization import into cell receptor internalization transport receptor-mediated endocytosis endocytosis establishment of localization vesicle-mediated transport establishment of protein localization nitrogen compound transport 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 cellular component organization positive regulation of endocytosis cellular component organization or biogenesis 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 negative adaptation of signaling pathway negative regulation of signaling negative regulation of biological process desensitization of G protein-coupled receptor signaling pathway negative regulation of G protein-coupled receptor signaling pathway negative regulation of cell communication negative regulation of cellular process regulation of G protein-coupled receptor signaling pathway negative regulation of response to stimulus negative regulation of signal transduction adaptation of signaling pathway G protein-coupled receptor signaling pathway clathrin-dependent endocytosis cell surface receptor signaling pathway Notch signaling pathway negative regulation of Notch signaling pathway regulation of Notch signaling pathway catabolic process proteolysis involved in protein catabolic process primary metabolic process protein catabolic process macromolecule catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process proteolysis ubiquitin-dependent protein catabolic process metabolic process macromolecule metabolic process protein metabolic process positive regulation of phosphorylation regulation of protein modification process regulation of protein phosphorylation positive regulation of protein metabolic process positive regulation of phosphate metabolic process regulation of primary metabolic process positive regulation of metabolic process positive regulation of protein modification process phosphate-containing compound metabolic process positive regulation of macromolecule metabolic process positive regulation of protein phosphorylation phosphorus metabolic process protein modification process protein phosphorylation positive regulation of phosphorus metabolic process phosphorylation regulation of protein metabolic process regulation of macromolecule metabolic process macromolecule modification regulation of phosphorus metabolic process regulation of phosphorylation regulation of metabolic process G protein-coupled receptor internalization	cell projection cellular anatomical structure pseudopodium plasma membrane bounded cell projection protein-containing complex intracellular anatomical structure plasma membrane protein complex membrane plasma membrane membrane protein complex coated membrane endomembrane system clathrin coat membrane coat cell projection cellular anatomical structure pseudopodium plasma membrane bounded cell projection protein-containing complex intracellular anatomical structure plasma membrane protein complex membrane plasma membrane membrane protein complex coated membrane endomembrane system clathrin coat membrane coat cell periphery clathrin-coated pit cytoplasm clathrin coat of coated pit cytosol membrane-bounded organelle intracellular organelle cytoplasmic vesicle organelle intracellular vesicle intracellular membrane-bounded organelle vesicle nucleus

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
D [auth R]	IPR002230	Cannabinoid receptor family	Family
D [auth R]	IPR000276	G protein-coupled receptor, rhodopsin-like	Family
D [auth R]	IPR017452	GPCR, rhodopsin-like, 7TM	Domain
D [auth R]	IPR000810	Cannabinoid receptor type 1	Family
D [auth R]	IPR000161	Vasopressin V2 receptor	Family
D [auth R]	IPR000276	G protein-coupled receptor, rhodopsin-like	Family
D [auth R]	IPR017452	GPCR, rhodopsin-like, 7TM	Domain
D [auth R]	IPR001817	Vasopressin receptor	Family
A [auth C]	IPR000698	Arrestin	Family
A [auth C]	IPR011021	Arrestin-like, N-terminal	Domain
A [auth C]	IPR014753	Arrestin, N-terminal	Homologous Superfamily
A [auth C]	IPR014756	Immunoglobulin E-set	Homologous Superfamily
A [auth C]	IPR014752	Arrestin-like, C-terminal	Homologous Superfamily
A [auth C]	IPR017864	Arrestin, conserved site	Conserved Site
A [auth C]	IPR011022	Arrestin C-terminal-like domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
D [auth R]	Pharos: P30518	obesity disorder cannabis dependence pancreatitis rhabdomyosarcoma status epilepticus Huntington disease Pain temporal lobe epilepsy cocaine abuse visual epilepsy endometriosis substance withdrawal syndrome cirrhosis of liver cocaine dependence schizophrenia obesity disorder cannabis dependence pancreatitis rhabdomyosarcoma status epilepticus Huntington disease Pain temporal lobe epilepsy cocaine abuse visual epilepsy endometriosis substance withdrawal syndrome cirrhosis of liver cocaine dependence schizophrenia multiple sclerosis cutaneous melanoma lung adenocarcinoma malignant colon neoplasm bipolar disorder pancreatic intraductal papillary-mucinous neoplasm malignant pancreatic neoplasm medulloblastoma common cold depressive disorder anxiety disorder drug dependence oligodendroglioma ovarian cancer large cell medulloblastoma attention deficit hyperactivity disorder, inattentive type lung cancer binge eating disorder breast cancer malignant ependymoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia psoriasis monogenic obesity Alzheimer disease interstitial cystitis ductal breast carcinoma in situ substance dependence atypical teratoid rhabdoid tumor substance-related disorder major depressive disorder pancreatic intraductal papillary-mucinous carcinoma pancreatic neoplasm glioblastoma pituitary cancer tuberculosis migraine disorder adenoma movement disorder allergic rhinitis hypotensive disorder non-small cell lung carcinoma invasive ductal breast carcinoma astrocytic tumor osteosarcoma substance abuse juvenile Huntington disease nephrogenic diabetes insipidus nephrogenic syndrome of inappropriate antidiuresis congenital adrenal hyperplasia cardiomyopathy congestive heart failure diabetes insipidus, nephrogenic, X-linked Oliguria diabetes insipidus X-linked disease inappropriate ADH syndrome hereditary von Willebrand disease intellectual disability systemic lupus erythematosus kidney disease diabetes insipidus, nephrogenic, autosomal hemophilia A autosomal dominant hypophosphatemic rickets celiac disease rheumatoid arthritis genetic endocrine growth disease heart failure

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A [auth C], D [auth R]	PDBTM	Annotated as membrane protein by PDBTM

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
D [auth R]	SEP	Parent Component: SER RESID: AA0037 PSI-MOD : O-phospho-L-serine MOD:00046
D [auth R]	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.