Annotations: 8U4S

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
I [auth G]	SCOP2B Superfamily	G protein-coupled receptor-like	8091230	3000473	SCOP2B (2022-06-29)
I [auth G]	SCOP2B Superfamily	G protein-coupled receptor-like	8091230	3000473	SCOP2B (2022-06-29)
F [auth C]	SCOP2B Superfamily	G protein-coupled receptor-like	8091230	3000473	SCOP2B (2022-06-29)
F [auth C]	SCOP2B Superfamily	G protein-coupled receptor-like	8091230	3000473	SCOP2B (2022-06-29)
C [auth R]	SCOP2B Superfamily	G protein-coupled receptor-like	8091230	3000473	SCOP2B (2022-06-29)
C [auth R]	SCOP2B Superfamily	G protein-coupled receptor-like	8091230	3000473	SCOP2B (2022-06-29)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth H], E [auth B], H [auth F]	Heavy Chain	IGHV1	-	c-x-c chemokine receptor type 4	SAbDab (2025-11-28)
A [auth L], D [auth A], G [auth E]	Light Chain	IGKV2	Kappa	c-x-c chemokine receptor type 4	SAbDab (2025-11-28)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C [auth R], F [auth C], I [auth G]	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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth R], F [auth C], I [auth G]	C-X-C chemokine receptor type 4	molecular transducer activity coreceptor activity signaling receptor activity cytoskeletal protein binding myosin light chain binding protein binding binding myosin binding C-C chemokine binding chemokine binding cytokine binding G protein-coupled chemoattractant receptor activity C-X-C motif chemokine 12 receptor activity C-X-C chemokine receptor activity molecular transducer activity coreceptor activity signaling receptor activity cytoskeletal protein binding myosin light chain binding protein binding binding myosin binding C-C chemokine binding chemokine binding cytokine binding G protein-coupled chemoattractant receptor activity C-X-C motif chemokine 12 receptor activity C-X-C chemokine receptor activity chemokine receptor activity G protein-coupled receptor activity transmembrane signaling receptor activity cytokine receptor activity immune receptor activity ubiquitin protein ligase binding ubiquitin-like protein ligase binding enzyme binding virus receptor activity exogenous protein binding C-C chemokine receptor activity ubiquitin binding ubiquitin-like protein binding actin binding	bioluminescence metabolic process cellular process generation of precursor metabolites and energy developmental process multicellular organism development multicellular organismal process head development central nervous system development anatomical structure development animal organ development brain development nervous system development system development bioluminescence metabolic process cellular process generation of precursor metabolites and energy developmental process multicellular organism development multicellular organismal process head development central nervous system development anatomical structure development animal organ development brain development nervous system development system development regulation of biological process cell adhesion regulation of cellular process regulation of cell adhesion biological regulation apoptotic process cell death programmed cell death membrane organization cellular component organization myelination myelin maintenance axon ensheathment ensheathment of neurons plasma membrane organization cellular component organization or biogenesis endomembrane system organization cell chemotaxis cellular response to stimulus chemotaxis dendritic cell chemotaxis response to stimulus response to external stimulus leukocyte migration dendritic cell migration cellular response to chemical stimulus taxis immune system process response to chemical mononuclear cell migration cell migration cell motility leukocyte chemotaxis locomotion response to decreased oxygen levels response to hypoxia response to stress response to oxygen levels response to abiotic stimulus positive regulation of cytosolic calcium ion concentration regulation of biological quality neurogenesis cellular developmental process cell differentiation regulation of response to external stimulus regulation of chemotaxis regulation of response to stimulus regulation of locomotion immune response cell surface receptor signaling pathway chemokine (C-X-C motif) ligand 12 signaling pathway signaling CXCL12-activated CXCR4 signaling pathway response to cytokine response to chemokine cytokine-mediated signaling pathway cellular response to chemokine chemokine-mediated signaling pathway cell communication response to peptide G protein-coupled receptor signaling pathway cellular response to cytokine stimulus signal transduction C-X-C chemokine receptor CXCR4 signaling pathway intracellular signal transduction calcium-mediated signaling intracellular signaling cassette regulation of multicellular organismal development regulation of developmental process positive regulation of biological process vasculature development regulation of vasculature development circulatory system development positive regulation of developmental process positive regulation of vasculature development positive regulation of multicellular organismal process regulation of multicellular organismal process positive regulation of cell communication positive regulation of signal transduction regulation of signal transduction positive regulation of macrophage migration inhibitory factor signaling pathway positive regulation of response to cytokine stimulus positive regulation of response to stimulus macrophage migration inhibitory factor signaling pathway positive regulation of cellular process regulation of signaling regulation of macrophage migration inhibitory factor signaling pathway regulation of cytokine-mediated signaling pathway regulation of response to cytokine stimulus regulation of cell communication positive regulation of cytokine-mediated signaling pathway positive regulation of signaling homeostatic process adaptive thermogenesis positive regulation of metabolic process multicellular organismal-level homeostasis regulation of cold-induced thermogenesis cold-induced thermogenesis temperature homeostasis positive regulation of cold-induced thermogenesis regulation of metabolic process positive regulation of locomotion regulation of cell motility positive regulation of cell migration positive regulation of cell motility regulation of cell migration biological process involved in interspecies interaction between organisms response to other organism response to external biotic stimulus response to virus response to biotic stimulus defense response inflammatory response positive regulation of nervous system development cell development regulation of neurogenesis regulation of cell differentiation regulation of gliogenesis positive regulation of gliogenesis regulation of cell development regulation of nervous system development gliogenesis positive regulation of cell differentiation positive regulation of neurogenesis positive regulation of oligodendrocyte differentiation positive regulation of cell development regulation of glial cell differentiation positive regulation of glial cell differentiation oligodendrocyte differentiation glial cell differentiation regulation of oligodendrocyte differentiation	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space vesicle extracellular membrane-bounded organelle cell leading edge intracellular anatomical structure cytoplasm anchoring junction cell junction intracellular organelle lytic vacuole vacuole intracellular membrane-bounded organelle lysosome protein-containing complex cytoplasmic vesicle intracellular vesicle early endosome endosome endomembrane system late endosome
B [auth H], E [auth B], H [auth F]	REGN7663 Fab heavy chain	-	-	-
A [auth L], D [auth A], G [auth E]	REGN7663 Fab light chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth R], F [auth C], I [auth G]	IPR000786	Green fluorescent protein, GFP	Family
C [auth R], F [auth C], I [auth G]	IPR011584	Green fluorescent protein-related	Family
C [auth R], F [auth C], I [auth G]	IPR009017	Green fluorescent protein	Homologous Superfamily
C [auth R], F [auth C], I [auth G]	IPR000355	Chemokine receptor family	Family
C [auth R], F [auth C], I [auth G]	IPR022726	CXC chemokine receptor 4 N-terminal domain	Domain
C [auth R], F [auth C], I [auth G]	IPR000276	G protein-coupled receptor, rhodopsin-like	Family
C [auth R], F [auth C], I [auth G]	IPR017452	GPCR, rhodopsin-like, 7TM	Domain
C [auth R], F [auth C], I [auth G]	IPR001277	CXC chemokine receptor 4/atypical chemokine receptor 2	Family
C [auth R], F [auth C], I [auth G]	IPR050119	C-C chemokine receptor type 1-9-like	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
C [auth R], F [auth C], I [auth G]	Pharos: P61073	WHIM syndrome juvenile idiopathic arthritis rheumatoid arthritis breast carcinoma Neoplasm Invasiveness breast cancer neuralgia interstitial cystitis osteosarcoma juvenile dermatomyositis lung carcinoma pilocytic astrocytoma lymphoplasmacytic lymphoma primitive neuroectodermal tumor AIDS WHIM syndrome juvenile idiopathic arthritis rheumatoid arthritis breast carcinoma Neoplasm Invasiveness breast cancer neuralgia interstitial cystitis osteosarcoma juvenile dermatomyositis lung carcinoma pilocytic astrocytoma lymphoplasmacytic lymphoma primitive neuroectodermal tumor AIDS malignant mesothelioma Sjogren syndrome atypical teratoid rhabdoid tumor Waldenstrom macroglobulinemia breast disease congenital anemia nephrosclerosis ductal breast carcinoma in situ glioblastoma invasive ductal breast carcinoma ovarian cancer large cell medulloblastoma periodontitis lung disease pituitary cancer malignant ependymoma psoriasis astrocytic tumor tuberculosis cancer cutaneous lupus erythematosus dermatomyositis esophageal adenocarcinoma hematologic disease oligodendroglioma pancreatic ductal adenocarcinoma lung cancer lymphatic system disease plasma cell myeloma malignant glioma atopic eczema malignant pancreatic neoplasm ulcerative colitis medulloblastoma cystic fibrosis Down syndrome gastric carcinoma

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
C [auth R], F [auth C], I [auth G]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
C [auth R], F [auth C], I [auth G]	MemProtMD	Annotated as membrane protein by MemProtMD

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.