期刊
FEBS LETTERS
卷 555, 期 3, 页码 495-499出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0014-5793(03)01312-7
关键词
ligand; orphan receptor; ChemR23; TIG2; GPCR
The orphan receptor ChemR23 is a G-protein coupled receptor (GPCR) with homology to neuropeptide and chemoattractant receptors. Tazarotene, a synthetic retinoid activating retinoic acid receptor (RAR), up-regulates tazarotene-induced gene-2 (TIG2). The function and molecular target of this protein are now described. By means of reverse pharmacology screening using a peptide library generated from human hemofiltrate, we have isolated and identified TIG2 as the natural ligand of ChemR23 and report the specific molecular form of the bioactive, circulating TIG2, representing the amino-acid residues 21 to 154 of the 163 amino acid-containing prepropeptide. Based on the expression pattern of ChemR23 and TIG2, the physiological role in bone development, immune and inflammatory responses and the maintenance of skin is now being investigated. (C) 2003 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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