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Beschreibung

C-C chemokine receptor type 2 (UniProt P41597, also known as C-C CKR-2, CC-CKR-2, CCR-2, CCR2, CD192, MCP-1-R, Monocyte chemoattractant protein 1 receptor) is encoded by the CCR2 (also known as CMKBR2) gene (Gene ID 729230) in human. CC chemokine receptors (CCRs) are 7-transmembrane G protein-coupled receptors (GPCRs) that bind CC chemokines (CCLs) and mediate their biological activities. CCRs and CCLs play a central role in physiological and pathological recruitment of immune cells. CCR2 can interact with CCL2, CCL8 and CCL16, it is found on the surface of monocytes, activated memory T cells, B cells, and basophils in humans, and also in peritoneal macrophages in mice. CCR2 plays an important role in the recruitment of monocytes/macrophages and T cells. CCR2-knockout mice show a partial defect in macrophage function, decreased Th1 immune response, reduced delayed-type hypersensitivity reaction, and are more susceptible to pathogenic bacteria infections. Human CCR2 is a 7-transmembrane (a.a. 43-70, 81-100, 115-136, 154-178, 207-226, 244-268, 286-309) GPCR with an N-terminal extracellular domain (a.a. 1-42) and a C-terminoal cytoplasmic domain (a.a. 310-374).