Document Detail


Identification of a unique pheromonotropic neuropeptide including double FXPRL motifs from a geometrid species, Ascotis selenaria cretacea, which produces an epoxyalkenyl sex pheromone.
MedLine Citation:
PMID:  17368196     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Virgin females of the Japanese giant looper (Ascotis selenaria cretacea, Assc) in the family of Geometridae secrete an epoxyalkenyl sex pheromone to attract males. To regulate its biosynthesis in the pheromone gland, Assc females produce a pheromone biosynthesis-activating neuropeptide (PBAN) in the suboesophageal ganglion (SG), as do females in many lepidopteran species. We have isolated Assc-PBAN cDNA, which encodes 181 amino acids, including a PBAN homologue and four other putative peptides: a diapause hormone (DH) homologue, alpha-SG neuropeptide (SGNP), beta-SGNP, and gamma-SGNP, all of which shared an FXPR(K)L motif on their C-termini. Although PBANs with 30-35 amino acids have been characterized from 15 other species, the Assc-PBAN homologue consisted of 28 amino acids and showed low homology (<46%) compared with the others. Assc-beta-SGNP with eight amino acids was also shorter than the other beta-SGNPs (16-22 amino acids). Furthermore, all of the known PBAN cDNAs have a GRR sequence between beta-SGNP and PBAN as a cleavage site, but the Assc-PBAN cDNA showed an unusual GR sequence at the corresponding position, indicating the possibility of non-cleavage between the beta-SGNP and PBAN. When the GR sequence was a cleavage site, the question arose of whether or not the glutamine residue at the N-terminus of the Assc-PBAN homologue was cyclized. To identify the sequence of the Assc-PBAN, the brain-SG extract was fractionated by HPLC referring to three synthetic peptides with the predicted sequences. The chromatographic behavior of the natural pheromonotropic peptide revealed the unique structure of Assc-PBAN including beta-SGNP, i.e., SVDFTPRLGRQLVDDVPQRQQIEEDRLGSRTRFFSPRL-NH(2), as the first determination of PBAN from the insects producing an epoxyalkenyl sex pheromone.
Authors:
Takeshi Kawai; Atsushi Ohnishi; Masataka G Suzuki; Takeshi Fujii; Kanae Matsuoka; Ikuo Kato; Shogo Matsumoto; Tetsu Ando
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-12-28
Journal Detail:
Title:  Insect biochemistry and molecular biology     Volume:  37     ISSN:  0965-1748     ISO Abbreviation:  Insect Biochem. Mol. Biol.     Publication Date:  2007 Apr 
Date Detail:
Created Date:  2007-03-19     Completed Date:  2007-06-13     Revised Date:  2007-11-07    
Medline Journal Info:
Nlm Unique ID:  9207282     Medline TA:  Insect Biochem Mol Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  330-7     Citation Subset:  IM    
Affiliation:
Graduate School of Bio-Applications and Systems Engineering (BASE), Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan.
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MeSH Terms
Descriptor/Qualifier:
Amino Acid Motifs
Amino Acid Sequence
Animals
Base Sequence
Chromatography, High Pressure Liquid
Female
Gene Expression
Male
Molecular Sequence Data
Moths / chemistry*,  metabolism
Neuropeptides / chemistry*,  metabolism
Sequence Analysis, DNA
Sex Attractants / metabolism*
Chemical
Reg. No./Substance:
0/Neuropeptides; 0/Sex Attractants
Comments/Corrections
Erratum In:
Insect Biochem Mol Biol. 2007 Oct;37(10):1108

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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