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Insect Biochem Mol Biol

Title:		Comparative sex pherome biosynthesis in Thaumetopoea pityocampa and T. processionea: a rationale for the phenotypic variation in the sex pherome within the genus Thaumetopoea
Author(s):		Villorbina G; Rodriguez S; Camps F; Fabrias G;
Address:		"Department of Biological Organic Chemistry, IIQAB-CSIC, Jordi Girona 18, 08034-Barcelona, Spain"
Journal Title:		Insect Biochem Mol Biol
Year:		2003
Volume:		33
Issue:		2
Page Number:		155 - 161
DOI:		10.1016/s0965-1748(02)00186-8
ISSN/ISBN:		0965-1748 (Print) 0965-1748 (Linking)
Abstract:		"The female sex pheromones of the Mediterranean processionary moths (Thaumetopoea sp.) are conjugated dienes or enynes of 16 carbon atoms with the unsaturations located at C11 and C13. To investigate the biochemical basis of this phenotypic variation, the biosynthetic pathway of T. processionea sex pheromone, a diene acetate, has been elucidated and compared to that reported for the enyne-producing species T. pityocampa. Mass labeling experiments showed that T. processionea sex pheromone is biosynthesized from palmitic acid, by subsequent (Z)-11 and (Z)-13 desaturations and final reduction and acetylation. The Pheromone Biosynthesis Activating Neuropeptide (PBAN) activates this biosynthetic pathway downstream of the dienoate intermediate. When either 11-hexadecynoic acid or (Z)-13-hexadecen-11-ynoic acid were administered to T. processionea, this species was able to produce the enyne sex pheromone of T. pityocampa upon PBAN stimulation. In contrast, T. pityocampa does not produce either 11-hexadecynyl acetate or (Z,Z)-11,13-hexadecadienyl acetate, despite having the corresponding precursors in the pheromone gland. However, both acetates are detected after administration of the corresponding alcohols. These overall results suggest that the absence of delta(11) acetylenase and the existence of an enynoate specific reductase in the diene and enyne-producing Thaumetopeae, respectively, account for the different sex pheromones produced by the two groups"
Keywords:		Animals Female *Genetic Variation Male Moths/genetics/*physiology Phenotype Pupa Sex Attractants/*genetics Species Specificity;
Notes:		"MedlineVillorbina, G Rodriguez, S Camps, F Fabrias, G eng Comparative Study Research Support, Non-U.S. Gov't England 2003/01/22 Insect Biochem Mol Biol. 2003 Feb; 33(2):155-61. doi: 10.1016/s0965-1748(02)00186-8"