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Sex pheromone biosynthesis in the processionary moth Thaumetopoea pityocampa by delta-13 desaturation

✍ Scribed by Gemma Arsequell; Dr. Gemma Fabriàs; Dr. Francisco Camps

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
489 KB
Volume
14
Category
Article
ISSN
0739-4462

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✦ Synopsis

In vivo treatments of female sex pheromone glands of the processionary moth, Thaurnetopoea pityocampa, with mass-labeled fatty acids showed that ( Z ) -13-hexadecen-11-ynyl acetate, the main sex pheromone component, is biosynthesized from palmitic acid by the combined action of delta-I1 and delta-13 desaturases. The involvement of this unusual delta-13 has been proven by application of [16,16,16-2H31 [1,2-'3C&hexadecanoic acid to the glands with a resultant incorporation of all labeled atoms into the pheromone and each one of the corresponding intermediates. These results seem to exclude alternative biosynthetic pathways, such as chain shortening and elongation combined with delta-I1 desaturation. The delta-I1 desaturase responsible for the formation of the triple bond in both the 11-hexadecynoyl and (Z)-13-hexadecen-11-ynoyl intermediates i s also an unusual enzyme not previously reported in lepidopteran sex pheromone biosynthesis.

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