Spiroacetal Biosynthesis in Insects from Diptera to Hymenoptera: The Giant Ichneumon Wasp Megarhyssa nortoni nortoni Cresson
| Autor: | Patricia Y. Hayes, Fredrik Rahm, James J. De Voss, William Kitching, Brett D. Schwartz, Christopher J. Moore |
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| Rok vydání: | 2008 |
| Předmět: |
Decarboxylation
Wasps Hymenoptera Biochemistry Gas Chromatography-Mass Spectrometry Catalysis Parasitoid wasp Hydroxylation chemistry.chemical_compound Acetals Colloid and Surface Chemistry Biosynthesis Animals Organic chemistry Spiro Compounds Gland secretion Megarhyssa nortoni biology Diptera General Chemistry Monooxygenase biology.organism_classification Oxygen chemistry Female |
| Zdroj: | Journal of the American Chemical Society. 130:14853-14860 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/ja8036433 |
| Popis: | The volatile components of the mandibular gland secretion generated by the Giant Ichneumon parasitoid wasp Megarhyssa nortoni nortoni Cresson are mainly spiroacetals and methyl ketones, and all have an odd number of carbon atoms. A biosynthetic scheme rationalizing the formation of these diverse components is presented. This scheme is based on the results of incorporation studies using (2)H-labeled precursors and [(18)O]dioxygen. The key steps are postulated to be decarboxylation of beta-ketoacid equivalents, beta-oxidation (chain shortening), and monooxygenase-mediated hydroxylation leading to a putative ketodiol that cyclizes to spiroacetals. The generality of the role of monooxygenases in spiroacetal formation in insects is considered, and overall, a cohesive, internally consistent theory of spiroacetal generation by insects is presented, against which future hypotheses will have to be compared. |
| Databáze: | OpenAIRE |
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