Article (Périodiques scientifiques)
Elucidation of the sex-pheromone biosynthesis producing 5,7-dodecadienes in Dendrolimus punctatus (Lepidoptera: Lasiocampidae) reveals Delta 11- and Delta 9-desaturases with unusual catalytic properties.
Lienard, Marjorie; Lassance, Jean-Marc; Wang, Hong-Lei et al.
2010In Insect Biochemistry and Molecular Biology, 40 (6), p. 440-52
Peer reviewed vérifié par ORBi
 

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Mots-clés :
DNA, Complementary; Insect Proteins; RNA, Messenger; Sex Attractants; EC 1.14.19.- (Fatty Acid Desaturases); EC 1.14.19.1 (Stearoyl-CoA Desaturase); Amino Acid Sequence; Animals; Base Sequence; Catalysis; DNA, Complementary/chemistry; Fatty Acid Desaturases/chemistry/isolation & purification/physiology; Female; Gas Chromatography-Mass Spectrometry; Insect Proteins/chemistry/isolation & purification/physiology; Introns; Molecular Sequence Data; Moths/enzymology/metabolism; Phylogeny; RNA, Messenger/metabolism; Saccharomyces cerevisiae/genetics; Sequence Alignment; Sequence Analysis, Protein; Sex Attractants/biosynthesis/chemistry; Stearoyl-CoA Desaturase/chemistry/isolation & purification/physiology; Substrate Specificity
Résumé :
[en] Sex pheromones produced by female moths of the Lasiocampidae family include conjugated 5,7-dodecadiene components with various oxygenated terminal groups. Here we describe the molecular cloning, heterologous expression and functional characterization of desaturases associated with the biosynthesis of these unusual chemicals. By homology-based PCR screening we characterized five cDNAs from the female moth pheromone gland that were related to other moth desaturases, and investigated their role in the production of the (Z)-5-dodecenol and (Z5,E7)-dodecadienol, major pheromone constituents of the pine caterpillar moth, Dendrolimus punctatus. Functional expression of two desaturase cDNAs belonging to the Delta 11-subfamily, Dpu-Delta 11(1)-APSQ and Dpu-Delta 11(2)-LPAE, showed that they catalysed the formation of unsaturated fatty acyls (UFAs) that can be chain-shortened by beta-oxidation and subsequently reduced to the alcohol components. A first (Z)-11-desaturation step is performed by Dpu- Delta 11(2)-LPAE on stearic acid that leads to (Z)-11-octadecenoic acyl, which is subsequently chain shortened to the (Z)-5-dodecenoic acyl precursor. The Dpu-Delta 11(1)-APSQ desaturase had the unusual property of producing Delta 8 mono-UFA of various chain lengths, but not when transformed yeast were grown in presence of (Z)-9-hexadecenoic acyl, in which case the biosynthetic intermediate (Z9,E11)-hexadecadienoic UFA was produced. In addition to a typical Z9 activity, a third transcript, Dpu- Delta 9-KPSE produced E9 mono-UFAs of various chain lengths. When provided with the (Z)-7-tetradecenoic acyl, it formed the (Z7,E9)-tetradecadienoic UFA, another biosynthetic intermediate that can be chain-shortened to (Z5,E7)-dodecadienoic acyl. Both Dpu-Delta 11(1)-APSQ and Dpu-Delta 9-KPSE thus exhibited desaturase activities consistent with the biosynthesis of the dienoic precursor. The combined action of three desaturases in generating a dienoic sex-pheromone component emphasizes the diversity and complexity of chemical reactions that can be catalysed by pheromone biosynthetic fatty-acyl-CoA desaturases in moths.
Disciplines :
Entomologie & lutte antiravageur
Auteur, co-auteur :
Lienard, Marjorie  ;  Université de Liège - ULiège > GIGA > GIGA Molecular Biology of Diseases ; Université de Liège - ULiège > Département des sciences de la vie
Lassance, Jean-Marc  ;  Université de Liège - ULiège > Département de gestion vétérinaire des Ressources Animales (DRA) > Génomique animale
Wang, Hong-Lei
Zhao, Cheng-Hua
Piskur, Jure
Johansson, Tomas
Lofstedt, Christer
Langue du document :
Anglais
Titre :
Elucidation of the sex-pheromone biosynthesis producing 5,7-dodecadienes in Dendrolimus punctatus (Lepidoptera: Lasiocampidae) reveals Delta 11- and Delta 9-desaturases with unusual catalytic properties.
Date de publication/diffusion :
juin 2010
Titre du périodique :
Insect Biochemistry and Molecular Biology
ISSN :
0965-1748
eISSN :
1879-0240
Maison d'édition :
Elsevier, Gb
Volume/Tome :
40
Fascicule/Saison :
6
Pagination :
440-52
Peer reviewed :
Peer reviewed vérifié par ORBi
Commentaire :
(c) 2010 Elsevier Ltd. All rights reserved.
Disponible sur ORBi :
depuis le 30 mars 2022

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