Annotations: 8GO9

Structure of beta-arrestin2 in complex with a phosphopeptide corresponding to the human Atypical chemokine receptor 2, ACKR2 (D6R)

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)
E	MIF4G	e8go9E1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: MIF4G	ECOD (v294.2)
C	MIF4G	e8go9C1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: MIF4G	ECOD (v294.2)
D	MIF4G	e8go9D1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: MIF4G	ECOD (v294.2)
B	MIF4G	e8go9B1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: MIF4G	ECOD (v294.2)
F	MIF4G	e8go9F1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: MIF4G	ECOD (v294.2)
A	MIF4G	e8go9A1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: MIF4G	ECOD (v294.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C, E	Light Chain	IGKV1	Kappa	beta-arrestin-2 \| atypical chemokine receptor 2	SAbDab (2026-06-12)
B, D	Heavy Chain	IGHV3	-	beta-arrestin-2 \| atypical chemokine receptor 2	SAbDab (2026-06-12)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, F	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, F	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
G, H	Atypical chemokine receptor 2	molecular sequestering activity receptor decoy activity G protein-coupled chemoattractant receptor activity C-C chemokine receptor activity molecular transducer activity chemokine receptor activity G protein-coupled receptor activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity C-C chemokine binding protein binding binding molecular sequestering activity receptor decoy activity G protein-coupled chemoattractant receptor activity C-C chemokine receptor activity molecular transducer activity chemokine receptor activity G protein-coupled receptor activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity C-C chemokine binding protein binding binding chemokine binding cytokine binding	positive regulation of cytosolic calcium ion concentration biological regulation regulation of biological quality cell chemotaxis cellular response to stimulus chemotaxis response to stimulus response to external stimulus cellular response to chemical stimulus taxis response to chemical cell migration cellular process cell motility positive regulation of cytosolic calcium ion concentration biological regulation regulation of biological quality cell chemotaxis cellular response to stimulus chemotaxis response to stimulus response to external stimulus cellular response to chemical stimulus taxis response to chemical cell migration cellular process cell motility locomotion immune response immune system process defense response response to stress inflammatory response regulation of biological process regulation of cellular process signaling signal transduction intracellular signal transduction cell communication calcium-mediated signaling intracellular signaling cassette	membrane-bounded organelle intracellular anatomical structure early endosome endosome intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cellular anatomical structure cytoplasmic vesicle organelle cytoplasm vesicle cell periphery membrane-bounded organelle intracellular anatomical structure early endosome endosome intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cellular anatomical structure cytoplasmic vesicle organelle cytoplasm vesicle cell periphery cell surface membrane plasma membrane external side of plasma membrane side of membrane recycling endosome cytosol polymeric cytoskeletal fiber actin filament intracellular membraneless organelle actin cytoskeleton cytoskeleton membraneless organelle supramolecular fiber supramolecular polymer supramolecular complex
C, E	Fab30 Light Chain	-	-	-
B, D	Fab30 Heavy Chain	-	-	-
A, F	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

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
G, H	IPR000355	Chemokine receptor family	Family
G, H	IPR001277	CXC chemokine receptor 4/atypical chemokine receptor 2	Family
G, H	IPR000276	G protein-coupled receptor, rhodopsin-like	Family
G, H	IPR050119	C-C chemokine receptor type 1-9-like	Family
G, H	IPR017452	GPCR, rhodopsin-like, 7TM	Domain
A, F	IPR011022	Arrestin-like, C-terminal domain	Domain
A, F	IPR000698	Arrestin	Family
A, F	IPR011021	Arrestin-like, N-terminal	Domain
A, F	IPR014753	Arrestin, N-terminal	Homologous Superfamily
A, F	IPR014756	Immunoglobulin E-set	Homologous Superfamily
A, F	IPR017864	Arrestin, conserved site	Conserved Site
A, F	IPR014752	Arrestin-like, C-terminal domain superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
G, H	: O00590	osteosarcoma ovarian cancer psoriasis

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
G, H	SEP	Parent Component: SER : AA0037 : O-phospho-L-serine MOD:00046
G, H	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.