Journal
PEPTIDES
Volume 53, Issue -, Pages 125-133Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.peptides.2013.07.027
Keywords
Neuropeptide; G-protein coupled receptor (GPCR); Nilaparvata lugens; Prothoracicotropic hormone (PITH); Thyrotropin-releasing hormone receptor; (TRHR) Parathyroid hormone receptor (PTHR)
Funding
- NIAS Strategic Research Fund
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The genes encoding neuropeptides, neurohormones and their putative G-protein coupled receptors were identified in the brown planthopper (BPH), Nilaparvata lugens (Std1) by transcriptome analysis (RNA-seq). Forty-eight candidate genes were found to encode neuropeptides or peptide hormones. These include all known insect neuropeptides and neurohormones, with the exception of neuropeptide-like precursor 2 (NPLP2) and trissin. The gene coding for prothoracicotropic hormone (PTTH) was first identified from hemimetabolous insect. A total of 57 putative neuropeptide GPCR genes were identified and phylogenetic analysis showed most of them to be closely related to insect GPCRs. A notable finding was the occurrence of vertebrate hormone receptors, thyrotropin-releasing hormone receptor (TRHR)-like GPCR and parathyroid hormone receptor (PTHR)-like GPCRs. These results suggest that N. lugens possesses the most comprehensive neuropeptide system yet found in insects. Moreover, our findings demonstrate the power of RNA-seq as a tool for analyzing the neuropeptide-related genes in the absence of whole genome sequence information. (c) 2013 Elsevier Inc. All rights reserved.
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