CCL-24 (Eotaxin-2)

Eotaxin2, also named MPIF2 and Ckβ6, is a CC chemokine that is designated CCL24. Eotaxin2 cDNA encodes a 10.5 kDa, 119 amino acid residue precursor protein with a 26 aa residue signal peptide that is cleaved to generate a mature protein predicted to contain 93 amino acid residues with an N-glycosylation site. C-terminally truncated variants with 78, 73, 75 and 76 residues have also been described. Eotaxin 2 shares 40%, 42% and 39% amino acid sequence identity with other CC chemokines CCL7/MCP3, CCL3/MIP1α, and CCL11/Eotaxin, respectively. Eotaxin2 mRNA is weakly expressed in activated monocytes and T lymphocytes. Recombinant Eotaxin2 induces chemotaxis of eosinophils, basophils, and resting T lymphocytes, but not monocytes or activated T lymphocytes. Eotaxin2 also suppresses colony formation by high proliferative multipotential hematopoietic progenitors. On eosinophils, the effects of Eotaxin2, Eotaxin and CCL13/MCP4 are mediated by the receptor CCR3.