Annotations: 8TIN

Human ACKR3 phosphorylated by GRK2 in complex with Arrestin3 reconstructed without receptor/micelle

External Resource: Annotation

Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Protein Modification Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth H]	WD40	e8tinH1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)
B [auth A]	WD40	e8tinA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)
C [auth L]	WD40	e8tinL1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)
D [auth R]	WD40	e8tinR1	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
A [auth H]	Heavy Chain	IGHV3	-	beta-arrestin-2	SAbDab (2026-06-05)
C [auth L]	Light Chain	IGKV1	Kappa	beta-arrestin-2	SAbDab (2026-06-05)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B [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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth H]	Fab7 heavy chain	-	-	-
B [auth A]	Beta-arrestin-2	ion binding binding anion binding phosphatidylinositol binding small molecule binding phosphatidylinositol-3,4,5-trisphosphate binding phospholipid binding lipid binding phosphatidylinositol phosphate binding angiotensin receptor binding protein binding signaling receptor binding G protein-coupled receptor binding D1 dopamine receptor binding ion binding binding anion binding phosphatidylinositol binding small molecule binding phosphatidylinositol-3,4,5-trisphosphate binding phospholipid binding lipid binding phosphatidylinositol phosphate binding angiotensin receptor binding protein binding signaling receptor binding G protein-coupled receptor binding D1 dopamine receptor binding dopamine 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 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 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 multicellular organismal process system process sensory perception nervous system process sensory perception of pain G protein-coupled receptor internalization	cellular anatomical structure clathrin-coated pit membrane endomembrane system cell periphery plasma membrane membrane-bounded organelle intracellular anatomical structure intracellular vesicle intracellular membrane-bounded organelle intracellular organelle cytoplasmic vesicle organelle cytoplasm cellular anatomical structure clathrin-coated pit membrane endomembrane system cell periphery plasma membrane membrane-bounded organelle intracellular anatomical structure intracellular vesicle intracellular membrane-bounded organelle intracellular organelle cytoplasmic vesicle organelle cytoplasm vesicle endocytic vesicle nucleus
C [auth L]	Fab7 light chain	-	-	-
D [auth R]	Atypical chemokine receptor 3	molecular transducer activity coreceptor activity signaling receptor activity G protein-coupled chemoattractant receptor activity C-C chemokine receptor activity chemokine receptor activity G protein-coupled receptor activity transmembrane signaling receptor activity cytokine receptor activity immune receptor activity cargo receptor activity scavenger receptor activity C-X-C chemokine receptor activity C-C chemokine binding molecular transducer activity coreceptor activity signaling receptor activity G protein-coupled chemoattractant receptor activity C-C chemokine receptor activity chemokine receptor activity G protein-coupled receptor activity transmembrane signaling receptor activity cytokine receptor activity immune receptor activity cargo receptor activity scavenger receptor activity C-X-C chemokine receptor activity C-C chemokine binding protein binding binding chemokine binding cytokine binding C-X-C chemokine binding	positive regulation of cytosolic calcium ion concentration biological regulation regulation of biological quality developmental process multicellular organismal process parasympathetic nervous system development nervous system development multicellular organism development nerve development cranial nerve development central nervous system development preganglionic parasympathetic fiber development anatomical structure development oculomotor nerve development positive regulation of cytosolic calcium ion concentration biological regulation regulation of biological quality developmental process multicellular organismal process parasympathetic nervous system development nervous system development multicellular organism development nerve development cranial nerve development central nervous system development preganglionic parasympathetic fiber development anatomical structure development oculomotor nerve development autonomic nervous system development system development 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 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 blood vessel morphogenesis tube development angiogenesis vasculature development circulatory system development anatomical structure morphogenesis tube morphogenesis anatomical structure formation involved in morphogenesis blood vessel development immune response immune system process cell surface receptor signaling pathway response to cytokine response to chemokine cytokine-mediated signaling pathway cellular response to chemokine chemokine-mediated signaling pathway response to peptide response to chemical G protein-coupled receptor signaling pathway cellular response to cytokine stimulus positive regulation of locomotion regulation of cell motility positive regulation of mesenchymal stem cell migration positive regulation of cell migration regulation of mesenchymal stem cell migration regulation of locomotion mesenchymal stem cell migration positive regulation of cell motility regulation of cell migration cell migration cell motility locomotion calcium-mediated signaling cell chemotaxis chemotaxis response to external stimulus cellular response to chemical stimulus taxis cellular developmental process vasculogenesis cell differentiation negative regulation of cell population proliferation cell population proliferation regulation of cell population proliferation negative regulation of cellular process negative regulation of biological process cell adhesion negative regulation of signaling negative regulation of intracellular signal transduction regulation of cellular response to stress regulation of intrinsic apoptotic signaling pathway in response to DNA damage regulation of programmed cell death regulation of intrinsic apoptotic signaling pathway negative regulation of cell communication cellular response to stress response to stress negative regulation of apoptotic signaling pathway regulation of response to stress intrinsic apoptotic signaling pathway in response to DNA damage intrinsic apoptotic signaling pathway negative regulation of response to stimulus negative regulation of programmed cell death regulation of apoptotic process cell death negative regulation of signal transduction negative regulation of intrinsic apoptotic signaling pathway in response to DNA damage apoptotic signaling pathway negative regulation of intrinsic apoptotic signaling pathway negative regulation of apoptotic process DNA damage response apoptotic process programmed cell death regulation of apoptotic signaling pathway	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane clathrin-coated pit endomembrane system membrane-bounded organelle intracellular anatomical structure early endosome endosome intracellular vesicle cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane clathrin-coated pit endomembrane system membrane-bounded organelle intracellular anatomical structure early endosome endosome intracellular vesicle intracellular membrane-bounded organelle intracellular organelle cytoplasmic vesicle organelle cytoplasm vesicle recycling endosome

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth A]	IPR011022	Arrestin-like, C-terminal domain	Domain
B [auth A]	IPR000698	Arrestin	Family
B [auth A]	IPR011021	Arrestin-like, N-terminal	Domain
B [auth A]	IPR014753	Arrestin, N-terminal	Homologous Superfamily
B [auth A]	IPR014756	Immunoglobulin E-set	Homologous Superfamily
B [auth A]	IPR017864	Arrestin, conserved site	Conserved Site
B [auth A]	IPR014752	Arrestin-like, C-terminal domain superfamily	Homologous Superfamily
D [auth R]	IPR001416	Atypical chemokine receptor 3	Family
D [auth R]	IPR000276	G protein-coupled receptor, rhodopsin-like	Family
D [auth R]	IPR017452	GPCR, rhodopsin-like, 7TM	Domain
D [auth R]	IPR047143	G-protein coupled estrogen receptor 1-like	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
D [auth R]	: P25106	rheumatoid arthritis Liver Cirrhosis, Experimental carcinoma sarcomatoid carcinoma kidney disease colorectal cancer hepatocellular carcinoma malignant ependymoma adenoma pancreatic intraductal papillary-mucinous carcinoma astrocytic tumor pituitary cancer breast cancer tuberculosis colorectal carcinoma rheumatoid arthritis Liver Cirrhosis, Experimental carcinoma sarcomatoid carcinoma kidney disease colorectal cancer hepatocellular carcinoma malignant ependymoma adenoma pancreatic intraductal papillary-mucinous carcinoma astrocytic tumor pituitary cancer breast cancer tuberculosis colorectal carcinoma ductal breast carcinoma in situ gastric carcinoma invasive ductal breast carcinoma lung adenocarcinoma malignant mesothelioma oligodendroglioma adrenal cortex carcinoma pancreatic intraductal papillary-mucinous neoplasm atopic eczema polycystic ovary syndrome breast carcinoma ulcerative colitis facioscapulohumeral muscular dystrophy glioblastoma lung cancer medulloblastoma ovarian cancer pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia atypical teratoid rhabdoid tumor psoriasis breast fibroadenoma sinusitis undifferentiated carcinoma dermatomyositis gastric cancer

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
D [auth R]	SEP	Parent Component: SER : AA0037 : O-phospho-L-serine MOD:00046
D [auth R]	TPO	Parent Component: THR : AA0037 , AA0038 : O-phospho-L-serine MOD:00046 , O-phospho-L-threonine MOD:00047

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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.