Annotations: 8J9K

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C [auth D]	Frizzled	e8j9kD01	A: a/b three-layered sandwiches	X: ATP-grasp_6	H: ATP-grasp_6	T: ATP-grasp_6	F: Frizzled	ECOD (v294.1)
B	Frizzled	e8j9kB01	A: a/b three-layered sandwiches	X: ATP-grasp_6	H: ATP-grasp_6	T: ATP-grasp_6	F: Frizzled	ECOD (v294.1)
A [auth C]	Frizzled	e8j9kC01	A: a/b three-layered sandwiches	X: ATP-grasp_6	H: ATP-grasp_6	T: ATP-grasp_6	F: Frizzled	ECOD (v294.1)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth D]	Heavy Chain	IGHV3	-	beta-arrestin-2	SAbDab (2026-04-10)
B	Light Chain	IGKV1	Kappa	beta-arrestin-2	SAbDab (2026-04-10)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
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
C [auth D]	Fab6 heavy chain	-	-	-
B	Fab6 light chain	-	-	-
A [auth C]	Beta-arrestin-2	protein binding binding signaling receptor binding platelet activating factor receptor binding G protein-coupled receptor binding protein kinase B binding kinase binding enzyme binding protein kinase binding arrestin family protein binding protein-macromolecule adaptor activity molecular adaptor activity 14-3-3 protein binding protein-containing complex binding protein binding binding signaling receptor binding platelet activating factor receptor binding G protein-coupled receptor binding protein kinase B binding kinase binding enzyme binding protein kinase binding arrestin family protein binding protein-macromolecule adaptor activity molecular adaptor activity 14-3-3 protein binding protein-containing complex binding angiotensin receptor binding D1 dopamine receptor binding dopamine receptor binding mitogen-activated protein kinase binding ubiquitin protein ligase binding ubiquitin-like protein ligase binding type 1 angiotensin receptor binding identical protein binding protein domain specific binding adrenergic receptor binding alpha-1B adrenergic receptor binding alpha-1A adrenergic receptor binding follicle-stimulating hormone receptor binding G protein-coupled serotonin receptor binding type 2A serotonin receptor binding	multicellular organismal process regulation of tumor necrosis factor production regulation of cellular process negative regulation of biological process negative regulation of tumor necrosis factor production cytokine production regulation of 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 multicellular organismal process regulation of tumor necrosis factor production regulation of cellular process negative regulation of biological process negative regulation of tumor necrosis factor production cytokine production regulation of 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 tumor necrosis factor superfamily cytokine production negative regulation of cytokine production regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process tumor necrosis factor production regulation of gene expression negative regulation of gene expression regulation of tumor necrosis factor superfamily cytokine production biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process negative regulation of tumor necrosis factor superfamily cytokine production metabolic process cellular process regulation of macromolecule biosynthetic process macromolecule metabolic process negative regulation of multicellular organismal process regulation of metabolic process positive regulation of epithelial cell apoptotic process positive regulation of programmed cell death regulation of epithelial cell apoptotic process regulation of apoptotic process positive regulation of biological process regulation of programmed cell death cell death positive regulation of apoptotic process epithelial cell apoptotic process apoptotic process programmed cell death positive regulation of cellular process localization import into cell receptor internalization transport receptor-mediated endocytosis endocytosis establishment of localization vesicle-mediated transport interleukin-6 production regulation of interleukin-6 production negative regulation of interleukin-6 production 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 positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of gene expression positive regulation of biosynthetic process positive regulation of macromolecule metabolic process cellular response to stimulus negative adaptation of signaling pathway response to stimulus 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 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 trans-synaptic signaling modulation of chemical synaptic transmission cell-cell signaling chemical synaptic transmission synaptic signaling regulation of trans-synaptic signaling anterograde trans-synaptic signaling detection of external stimulus system process nervous system process response to external stimulus sensory perception of temperature stimulus sensory perception of pain detection of temperature stimulus involved in sensory perception response to temperature stimulus detection of abiotic stimulus detection of stimulus sensory perception detection of temperature stimulus response to abiotic stimulus detection of stimulus involved in sensory perception detection of temperature stimulus involved in sensory perception of pain regulation of cellular component organization apoptotic mitochondrial changes regulation of release of cytochrome c from mitochondria cellular component organization negative regulation of release of cytochrome c from mitochondria negative regulation of apoptotic signaling pathway cellular component organization or biogenesis mitochondrion organization negative regulation of cellular component organization negative regulation of programmed cell death regulation of organelle organization apoptotic signaling pathway organelle organization release of cytochrome c from mitochondria negative regulation of apoptotic process negative regulation of organelle organization regulation of mitochondrion organization regulation of apoptotic signaling pathway cell chemotaxis chemotaxis cellular response to chemical stimulus taxis response to chemical cell migration cell motility locomotion regulation of localization regulation of calcium ion transport positive regulation of calcium ion transport regulation of transport regulation of monoatomic ion transport calcium ion transport metal ion transport positive regulation of transport positive regulation of monoatomic ion transport monoatomic ion transport monoatomic cation transport regulation of metal ion transport postsynaptic signal transduction response to morphine response to isoquinoline alkaloid response to nitrogen compound response to alkaloid adult walking behavior adult locomotory behavior behavior adult behavior locomotory behavior walking behavior regulation of opioid receptor signaling pathway G protein-coupled opioid receptor signaling pathway negative regulation of opioid receptor signaling pathway collagen biosynthetic process regulation of collagen biosynthetic process regulation of collagen metabolic process positive regulation of collagen metabolic process positive regulation of collagen biosynthetic process collagen metabolic process cellular response to growth factor stimulus cell surface receptor protein serine/threonine kinase signaling pathway cell surface receptor signaling pathway cellular response to transforming growth factor beta stimulus response to endogenous stimulus cellular response to endogenous stimulus response to transforming growth factor beta transforming growth factor beta receptor signaling pathway response to growth factor transforming growth factor beta receptor superfamily signaling pathway enzyme-linked receptor protein signaling pathway G protein-coupled receptor internalization positive regulation of response to biotic stimulus pattern recognition receptor signaling pathway toll-like receptor signaling pathway response to biotic stimulus immune response-activating signaling pathway positive regulation of immune response regulation of immune system process positive regulation of immune system process innate immune response-activating signaling pathway immune response response to other organism regulation of innate immune response 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 regulation of toll-like receptor signaling pathway activation of immune response regulation of defense response regulation of response to biotic stimulus biological process involved in interspecies interaction between organisms regulation of response to external stimulus positive regulation of response to stimulus positive regulation of response to external stimulus immune response-regulating signaling pathway regulation of response to stress response to stress innate immune response response to external biotic stimulus positive regulation of innate immune response defense response defense response to symbiont negative regulation of toll-like receptor signaling pathway negative regulation of immune system process immune system process canonical NF-kappaB signal transduction intracellular signal transduction intracellular signaling cassette circadian rhythm positive regulation of cell communication positive regulation of signal transduction positive regulation of ERK1 and ERK2 cascade regulation of intracellular signal transduction positive regulation of MAPK cascade positive regulation of intracellular signal transduction regulation of MAPK cascade MAPK cascade ERK1 and ERK2 cascade regulation of ERK1 and ERK2 cascade positive regulation of signaling RNA metabolic process nucleobase-containing compound biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process transcription by RNA polymerase II negative regulation of intracellular signal transduction negative regulation of canonical NF-kappaB signal transduction regulation of canonical NF-kappaB signal transduction establishment of protein localization protein transport macromolecule localization intracellular protein localization 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 receptor-mediated endocytosis regulation of vesicle-mediated transport positive regulation of receptor internalization positive regulation of opioid receptor signaling pathway positive regulation of G protein-coupled receptor signaling pathway interleukin-1 production regulation of interleukin-1 beta production negative regulation of interleukin-1 beta production negative regulation of interleukin-1 production regulation of interleukin-1 production interleukin-1 beta production regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction phosphatidylinositol 3-kinase/protein kinase B signal transduction neuron apoptotic process negative regulation of neuron apoptotic process regulation of neuron apoptotic process catabolic process proteasomal protein catabolic process protein catabolic process proteasome-mediated ubiquitin-dependent protein catabolic process macromolecule catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process ubiquitin-dependent protein catabolic process regulation of immune effector process lymphocyte mediated immunity negative regulation of lymphocyte mediated immunity negative regulation of natural killer cell mediated immunity leukocyte mediated immunity natural killer cell mediated immunity regulation of natural killer cell mediated immunity negative regulation of immune response negative regulation of immune effector process leukocyte mediated cytotoxicity immune effector process regulation of leukocyte mediated immunity negative regulation of response to external stimulus negative regulation of defense response natural killer cell mediated cytotoxicity regulation of cell killing negative regulation of natural killer cell mediated cytotoxicity regulation of natural killer cell mediated cytotoxicity negative regulation of response to biotic stimulus negative regulation of leukocyte mediated cytotoxicity negative regulation of cell killing regulation of leukocyte mediated cytotoxicity regulation of lymphocyte mediated immunity negative regulation of leukocyte mediated immunity cell killing negative regulation of innate immune response cellular developmental process regulation of developmental process regulation of cell differentiation regulation of striated muscle cell differentiation regulation of cardiac muscle cell differentiation muscle cell differentiation striated muscle tissue development muscle structure development positive regulation of developmental process positive regulation of cell differentiation positive regulation of cardiocyte differentiation cell differentiation positive regulation of striated muscle cell differentiation muscle tissue development positive regulation of cardiac muscle cell differentiation heart development cardiac muscle tissue development cardiac muscle cell differentiation tissue development positive regulation of muscle cell differentiation cardiocyte differentiation circulatory system development regulation of muscle cell differentiation regulation of cardiocyte differentiation positive regulation of multicellular organismal process striated muscle cell differentiation positive regulation of synaptic transmission regulation of synaptic transmission, dopaminergic positive regulation of synaptic transmission, dopaminergic synaptic transmission, dopaminergic regulation of DNA biosynthetic process regulation of nucleobase-containing compound metabolic process positive regulation of DNA biosynthetic process DNA metabolic process positive regulation of DNA metabolic process DNA biosynthetic process regulation of DNA metabolic process regulation of interleukin-12 production negative regulation of interleukin-12 production interleukin-12 production positive regulation of nervous system development positive regulation of cell population proliferation cell development regulation of neurogenesis regulation of gliogenesis positive regulation of glial cell proliferation positive regulation of gliogenesis regulation of cell development regulation of nervous system development neurogenesis regulation of glial cell proliferation gliogenesis positive regulation of neurogenesis regulation of multicellular organismal development cell population proliferation positive regulation of cell development nervous system development regulation of cell population proliferation glial cell proliferation muscle cell apoptotic process smooth muscle cell apoptotic process regulation of muscle cell apoptotic process regulation of smooth muscle cell apoptotic process negative regulation of smooth muscle cell apoptotic process negative regulation of muscle cell apoptotic process	cell periphery postsynapse cellular anatomical structure postsynaptic membrane synapse cell junction membrane plasma membrane plasma membrane region synaptic membrane clathrin-coated pit endomembrane system intracellular anatomical structure cytoplasm cell periphery postsynapse cellular anatomical structure 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 membrane-bounded organelle intracellular vesicle intracellular membrane-bounded organelle intracellular organelle cytoplasmic vesicle organelle vesicle endocytic vesicle glutamatergic synapse neuron spine neuron projection dendritic spine plasma membrane bounded cell projection somatodendritic compartment cell projection dendrite dendritic tree nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen endosome postsynaptic density neuron to neuron synapse postsynaptic specialization asymmetric synapse

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth C]	IPR011022	Arrestin-like, C-terminal domain	Domain
A [auth C]	IPR000698	Arrestin	Family
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 domain superfamily	Homologous Superfamily
A [auth C]	IPR011021	Arrestin-like, N-terminal	Domain
A [auth C]	IPR017864	Arrestin, conserved site	Conserved Site

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.