Key biosynthetic gene subfamily recruited for pheromone production prior to the extensive radiation of Lepidoptera |
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Authors: | Marjorie A Liénard Maria Strandh Erik Hedenström Tomas Johansson Christer Löfstedt |
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Institution: | (1) Chemical Ecology and Ecotoxicology, Department of Ecology, Lund University, Ecology Building, SE-22362 Lund, Sweden;(2) Microbial Ecology, Department of Ecology, Lund University, Ecology Building, SE-22362 Lund, Sweden;(3) Department of Natural Sciences, Institute of Natural Sciences, SE-85170, Sundsvall, Sweden |
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Abstract: | Background Moths have evolved highly successful mating systems, relying on species-specific mixtures of sex pheromone components for
long-distance mate communication. Acyl-CoA desaturases are key enzymes in the biosynthesis of these compounds and to a large
extent they account for the great diversity of pheromone structures in Lepidoptera. A novel desaturase gene subfamily that
displays Δ11 catalytic activities has been highlighted to account for most of the unique pheromone signatures of the taxonomically
advanced ditrysian species. To assess the mechanisms driving pheromone evolution, information is needed about the signalling
machinery of primitive moths. The currant shoot borer, Lampronia capitella, is the sole reported primitive non-ditrysian moth known to use unsaturated fatty-acid derivatives as sex-pheromone. By combining
biochemical and molecular approaches we elucidated the biosynthesis paths of its main pheromone component, the (Z,Z)-9,11-tetradecadien-1-ol and bring new insights into the time point of the recruitment of the key Δ11-desaturase gene subfamily
in moth pheromone biosynthesis. |
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