Annotations: 9KY2

Structure of beta-arrestin2 in complex with mouse C5aR1pp

External Resource: Annotation

Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
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	IBN_N,Xpo1,CRM1_C,CRM1_repeat,CRM1_repeat_2,CRM1_repeat_3	e9ky2E1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: IBN_N,Xpo1,CRM1_C,CRM1_repeat,CRM1_repeat_2,CRM1_repeat_3	ECOD (v295.2)
C	IBN_N,Xpo1,CRM1_C,CRM1_repeat,CRM1_repeat_2,CRM1_repeat_3	e9ky2C1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: IBN_N,Xpo1,CRM1_C,CRM1_repeat,CRM1_repeat_2,CRM1_repeat_3	ECOD (v295.2)
D	IBN_N,Xpo1,CRM1_C,CRM1_repeat,CRM1_repeat_2,CRM1_repeat_3	e9ky2D1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: IBN_N,Xpo1,CRM1_C,CRM1_repeat,CRM1_repeat_2,CRM1_repeat_3	ECOD (v295.2)
B	IBN_N,Xpo1,CRM1_C,CRM1_repeat,CRM1_repeat_2,CRM1_repeat_3	e9ky2B1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: IBN_N,Xpo1,CRM1_C,CRM1_repeat,CRM1_repeat_2,CRM1_repeat_3	ECOD (v295.2)
F	Fusion_gly	e9ky2F1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Fusion_gly	ECOD (v295.2)
A	Fusion_gly	e9ky2A1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Fusion_gly	ECOD (v295.2)

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 \| c5a anaphylatoxin chemotactic receptor 1	SAbDab (2026-09-25)
B, D	Heavy Chain	IGHV3	-	beta-arrestin-2 \| c5a anaphylatoxin chemotactic receptor 1	SAbDab (2026-09-25)

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 [auth V], H [auth U]	C5a anaphylatoxin chemotactic receptor 1	opsonin receptor activity molecular transducer activity complement receptor activity transmembrane signaling receptor activity signaling receptor activity complement component C5a receptor activity immune receptor activity G protein-coupled receptor activity protein binding binding complement component C5a binding complement binding	positive regulation of cytosolic calcium ion concentration biological regulation regulation of biological quality 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 cytosolic calcium ion concentration biological regulation regulation of biological quality 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 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 cellular component organization cell junction organization presynapse organization synapse organization cellular component organization or biogenesis 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 regulation of immune system process positive regulation of immune system process cell surface receptor signaling pathway immune response-activating cell surface receptor signaling pathway immune response immune system process regulation of immune response activation of immune response amyloid-beta clearance cell chemotaxis chemotaxis neutrophil chemotaxis response to external stimulus neutrophil migration granulocyte migration leukocyte migration cellular response to chemical stimulus taxis granulocyte chemotaxis response to chemical myeloid leukocyte migration cell migration cell motility leukocyte chemotaxis locomotion system process nervous system process cognition cell population proliferation positive regulation of cell population proliferation positive regulation of epithelial cell proliferation regulation of cell population proliferation regulation of epithelial cell proliferation epithelial cell proliferation developmental process head development animal organ development brain development nervous system development multicellular organism development central nervous system development anatomical structure development cell proliferation in hindbrain neural precursor cell proliferation hindbrain development animal gross anatomical part developmental process system development positive regulation of locomotion regulation of cell motility positive regulation of chemotaxis positive regulation of cell migration positive regulation of neutrophil chemotaxis regulation of leukocyte chemotaxis regulation of leukocyte migration positive regulation of leukocyte chemotaxis positive regulation of granulocyte chemotaxis regulation of locomotion regulation of neutrophil chemotaxis regulation of neutrophil migration regulation of response to external stimulus regulation of granulocyte chemotaxis positive regulation of response to external stimulus positive regulation of cell motility regulation of cell migration positive regulation of leukocyte migration positive regulation of neutrophil migration regulation of chemotaxis neuron apoptotic process negative regulation of neuron apoptotic process negative regulation of programmed cell death regulation of apoptotic process negative regulation of biological process regulation of programmed cell death cell death negative regulation of apoptotic process negative regulation of cellular process apoptotic process programmed cell death regulation of neuron apoptotic process macrophage migration regulation of mononuclear cell migration positive regulation of macrophage migration macrophage chemotaxis regulation of macrophage migration positive regulation of mononuclear cell migration regulation of macrophage chemotaxis mononuclear cell migration positive regulation of macrophage chemotaxis cellular developmental process astrocyte differentiation cell development astrocyte activation glial cell development neurogenesis astrocyte development gliogenesis cell differentiation response to stress defense response cell activation glial cell differentiation glial cell activation inflammatory response neuroinflammatory response regulation of developmental process angiogenesis regulation of vasculature development positive regulation of developmental process tube morphogenesis regulation of anatomical structure morphogenesis blood vessel development 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 complement component C5a signaling pathway G protein-coupled receptor signaling pathway phospholipase C-activating G protein-coupled receptor signaling pathway mRNA transcription by RNA polymerase II RNA metabolic process primary metabolic process nucleobase-containing compound biosynthetic process mRNA transcription mRNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process DNA-templated transcription nucleic acid biosynthetic process transcription by RNA polymerase II adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway adenylate cyclase-modulating G protein-coupled receptor signaling pathway biological process involved in interspecies interaction between organisms response to other organism response to oxygen-containing compound response to nitrogen compound response to biotic stimulus response to bacterium response to external biotic stimulus response to molecule of bacterial origin response to peptidoglycan myeloid leukocyte activation leukocyte activation macrophage activation leukocyte activation involved in inflammatory response microglial cell activation defense response to Gram-positive bacterium defense response to bacterium	cellular anatomical structure apical part of cell cell surface cell periphery plasma membrane membrane basal part of cell basal plasma membrane plasma membrane region basolateral plasma membrane membrane-bounded organelle intracellular organelle intracellular anatomical structure cytoplasmic vesicle cellular anatomical structure apical part of cell cell surface cell periphery plasma membrane membrane basal part of cell basal plasma membrane plasma membrane region basolateral plasma membrane membrane-bounded organelle intracellular organelle intracellular anatomical structure cytoplasmic vesicle organelle intracellular vesicle cytoplasm intracellular membrane-bounded organelle vesicle
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 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 protein localization to cilium protein localization to organelle macromolecule localization intracellular protein localization protein localization to non-motile cilium positive regulation of smoothened signaling pathway regulation of smoothened signaling pathway cell surface receptor signaling pathway smoothened signaling pathway 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 [auth V], H [auth U]	IPR002234	Anaphylatoxin chemotactic receptor, C3a/C5a1/C5a2	Family
G [auth V], H [auth U]	IPR000276	G protein-coupled receptor, rhodopsin-like	Family
G [auth V], H [auth U]	IPR017452	GPCR, rhodopsin-like, 7TM	Domain
G [auth V], H [auth U]	IPR000826	Formyl peptide receptor-related	Family
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

Protein Modification Annotation

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