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Identification of the novel bioactive peptides dRYamide-1 and dRYamide-2, ligands for a neuropeptide Y-like receptor in Drosophila.

  • Takanori Ida‎ et al.
  • Biochemical and biophysical research communications‎
  • 2011‎

A number of bioactive peptides are involved in regulating a wide range of animal behaviors, including food consumption. Vertebrate neuropeptide Y (NPY) is a potent stimulator of appetitive behavior. Recently, Drosophila neuropeptide F (dNPF) and short NPF (sNPF), the Drosophila homologs of the vertebrate NPY, were identified to characterize the functions of NPFs in the feeding behaviors of this insect. Dm-NPFR1 and NPFR76F are the receptors for dNPF and sNPF, respectively; both receptors are G protein-coupled receptors (GPCRs). Another GPCR (CG5811; NepYR) was indentified in Drosophila as a neuropeptide Y-like receptor. Here, we identified 2 ligands of CG5811, dRYamide-1 and dRYamide-2. Both peptides are derived from the same precursor (CG40733) and have no significant structural similarities to known bioactive peptides. The C-terminal sequence RYamide of dRYamides is identical to that of NPY family peptides; on the other hand, dNPF and sNPF have C-terminal RFamide. When administered to blowflies, dRYamide-1 suppressed feeding motivation. We propose that dRYamides are related to the NPY family in vertebrates, similar to dNPF and sNPF.


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