CCL19, also known as MIP-3 beta (Macrophage Inflammatory Protein 3 beta), is a member of the CC- subfamily of chemokines. It is most closely related to CCL21, with which it shares 32% amino acid sequence homology. CCL19 and CCL21 are expressed mainly by stromal cells in the T cell-rich zones of lymph nodes. They are critical mediators of the homeostatic trafficking of naive T cells and activated dendritic cells into the secondary lymphoid organs. CCL19 and CCL21 also play a role in T cell priming and activation, as well as the recruitment of lymphocytes to inflamed tissue. Both proteins signal via the G protein-coupled receptor, CCR7, which is expressed on T cells and mature dendritic cells. Although CCL19 and CCL21 both exhibit the same affinity for CCR7, only the binding of CCL19 results in the desensitization and internalization of the receptor.
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Protein Aliases: beta chemokine exodus-3; Beta-chemokine exodus-3; C-C motif chemokine; C-C motif chemokine 19; CC chemokine ligand 19; chemokine (C-C motif) ligand 19; CK beta-11; EBI1 ligand chemokine; EBI1-ligand chemokine; Epstein-Barr virus-induced molecule 1 ligand chemokine; exodus-3; M-MIP-3-beta; Macrophage inflammatory protein 3 beta; macrophage inflammatory protein 3-beta; MIP-3-beta; small inducible cytokine subfamily A (Cys-Cys), member 19; Small-inducible cytokine A19
Gene Aliases: CCL19; CKb11; ELC; MIP-3b; MIP3B; SCYA19
UniProt ID: (Human) Q99731
Entrez Gene ID: (Human) 6363