CXCR4 is the receptor for the C-X-C chemokine CXCL12/SDF-1 that transduces a signal by increasing intracellular calcium ion levels and enhancing MAPK1/MAPK3 activation. It acts as a receptor for extracellular ubiquitin; leading to enhanced intracellular calcium ions and reduced cellular cAMP levels. It is involved in hematopoiesis and in cardiac ventricular septum formation. CXCR4 also plays an essential role in vascularization of the gastrointestinal tract, probably by regulating vascular branching and/or remodeling processes in endothelial cells. Involved in cerebellar development. In the CNS, could mediate hippocampal-neuron survival. It acts as a coreceptor (CD4 being the primary receptor) for HIV-1 X4 isolates and as a primary receptor for some HIV-2 isolates, and promotes Env-mediated fusion of the virus. CXCR4 binds bacterial lipopolysaccharide (LPS) et mediates LPS-induced inflammatory response, including TNF secretion by monocytes.
C-X-C chemokine receptor type 4; CD184; CD184 antigen; chemokine (C-X-C motif) receptor 4; chemokine (C-X-C) receptor 4; chemokine receptor; chemokine receptor 4; CXC-R4; CXCR-4; D2S201E; FB22; Fusin; HM89; HSY3RR; LAP-3; LAP3; LCR1; LESTR; Leukocyte-derived seven transmembrane domain receptor; leukocyte-expressed seven-transmembrane-domain; Lipopolysaccharide-associated protein 3; LPS-associated protein 3; neuropeptide Y receptor Y3; neuropeptide Y3 receptor; NPY3R; NPYR; NPYRL; NPYY3R; PB-CKR; Pre-B-cell-derived chemokine receptor; SDF-1 receptor; seven transmembrane helix receptor; seven-transmembrane-segment receptor, spleen; Stromal cell-derived factor 1 receptor; WHIM
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