Molecular evolution and functional characterization of the orexigenic peptide 26RFa and its receptor in vertebrates |
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| Authors: | Kazuyoshi Ukena Hubert Vaudry Jérôme Leprince Kazuyoshi Tsutsui |
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| Institution: | (1) Section of Behavioral Sciences, Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima 739-8521, Japan;(2) INSERM U982, Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, European Institute for Peptide Research (IFRMP 23), University of Rouen, 76821 Mont-Saint-Aignan, France;(3) Laboratory of Integrative Brain Sciences, Department of Biology, Center for Medical Life Science of Waseda University, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan; |
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| Abstract: | Several neuropeptides possessing the RFamide motif at their C-termini (designated RFamide peptides) have been characterized
in the hypothalamus of a variety of vertebrates. To date, five groups of the RFamide peptide family have been shown to exert
several important neuroendocrine, behavioral, sensory, and autonomic functions. Since the discovery of the 26-amino acid RFamide
peptide (termed 26RFa) from the frog brain, 26RFa has been shown to exert orexigenic activity in mammals and to be a ligand
of the previously identified orphan G-protein-coupled receptor GPR103. Recently, 26RFa and its cognate receptor GPR103 have
been identified in the brain of birds. This mini-review summarizes the advances in the identification, localization, and functions
of 26RFa and its cognate receptor GPR103 in vertebrates and highlights recent progress made in birds. |
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