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Insect Biochem Mol Biol

Title:		Alternative suppression of transcription from two desaturase genes is the key for species-specific sex pheromone biosynthesis in two Ostrinia moths
Author(s):		Sakai R; Fukuzawa M; Nakano R; Tatsuki S; Ishikawa Y;
Address:		"Laboratory of Applied Entomology, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan"
Journal Title:		Insect Biochem Mol Biol
Year:		2009
Volume:		20081101
Issue:		1
Page Number:		62 - 67
DOI:		10.1016/j.ibmb.2008.10.001
ISSN/ISBN:		1879-0240 (Electronic) 0965-1748 (Linking)
Abstract:		"Crossing of two Ostrinia moths that use different positional isomers as sex pheromone components revealed that species-specific pheromone is produced through alternative suppression of two pheromone gland-specific desaturases at the gene transcription level. The sex pheromone of Ostrinia scapulalis (the adzuki bean borer) is a blend of (Z)-11- and (E)-11-tetradecenyl acetates (Z/E11-14:OAc), whereas that of Ostrinia furnacalis (the Asian corn borer) is a blend of (Z)-12- and (E)-12-tetradecenyl acetates (Z/E12-14:OAc). Delta11-Desaturase is known to be involved in the biosynthesis of Z/E11-14:OAc, and Delta14-desaturase, in that of Z/E12-14:OAc. The F1 hybrid between O. scapulalis and O. furnacalis produced both parents' sex pheromone components (Z/E11-14:OAc and Z/E12-14:OAc). Although the two species have both Delta11- and Delta14-desaturase genes, transcription from the Delta14-desaturase gene was strongly suppressed in O. scapulalis, as was transcription from the Delta11-desaturase gene in O. furnacalis. Meanwhile, both genes were transcribed into mRNA in F1. The production/non-production of Z/E11-14:OAc and Z/E12-14:OAc in F1, F2, and backcross progenies could be explained by an autosomal locus that suppresses transcription from either the Delta11-desaturase or Delta14-desaturase gene. Based on the findings, the evolution of sex pheromone biosynthesis in O. scapulalis and O. furnacalis is discussed"
Keywords:		"Animals *Down-Regulation Fatty Acid Desaturases/*genetics/metabolism Female Insect Proteins/*genetics/metabolism Male Moths/*enzymology/genetics/metabolism Sex Attractants/*biosynthesis/genetics Species Specificity *Transcription, Genetic;"
Notes:		"MedlineSakai, Ryota Fukuzawa, Mai Nakano, Ryo Tatsuki, Sadahiro Ishikawa, Yukio eng Research Support, Non-U.S. Gov't England 2008/11/11 Insect Biochem Mol Biol. 2009 Jan; 39(1):62-7. doi: 10.1016/j.ibmb.2008.10.001. Epub 2008 Nov 1"