Protein Function: Strongly chemotactic for naive (L-selectinhi) CD4 T- cells and for CD8 T-cells and weakly attractive for resting B- cells and memory (L-selectinlo) CD4 T-cells. May play a role in promoting encounters between recirculating T-cells and dendritic cells and in the migration of activated B-cells into the T-zone of secondary lymphoid tissues. Binds to chemokine receptor CCR7. Binds to atypical chemokine receptor ACKR4 and mediates the recruitment of beta-arrestin (ARRB1/2) to ACKR4.
Background: Chemokine(C-C motif) ligand 19 (CCL19) is a small cytokine belonging to the CC chemokine family that is also known as EBI1 ligand chemokine (ELC) and macrophage inflammatory protein-3-beta (MIP-3-beta). Using PCR of human-rodent hybrids, the CCL19 gene was mapped to human chromosome 9p13, and the CCL19 gene is not part of the CC chemokine gene cluster on chromosome 17. The cytokine encoded by this gene may play a role in normal lymphocyte recirculation and homing. It also plays an important role in trafficking of T cells in thymus, and in T cell and B cell migration to secondary lymphoid organs.
Synonyms: C-C motif chemokine 19,Epstein-Barr virus-induced molecule 1 ligand chemokine,EBI1 ligand chemokine,ELC,Small-inducible cytokine A19,Ccl19,Elc, Scya19,
Full Gene Name: C-C motif chemokine 19Cellular Localisation: Secreted.