Stereochemistry of an alcohol oxidase from the defensive secretion of larvae of the leaf beetle Phaedon armoraciae (coleoptera: Chrysomelidae)
作者:Martin Veith、Konrad Dettner、Wilhelm Boland
DOI:10.1016/0040-4020(96)00298-0
日期:1996.5
Larvae of the leaf beetle Phaedon armoraciae produce the iridoids chrysomelidial 1 and plagiodial 3 from geraniol 6 by an oxidative sequence identical to that known in plants. Following ω-oxidation of geraniol the resulting 8-hydroxygeraniol 7 is oxidised via 8-oxogeraniol 14 and 8-hydroxygeranial 15 and to the dialdehyde 8. In plants this transformation is achieved by NADP+ dependent oxidoreductases
叶甲虫Phaedon armariaciae的幼虫通过与植物中已知的氧化顺序相同的氧化顺序,从香叶醇6中产生虹膜状的蝶形小体1和斜突小体3。香叶醇的ω-氧化后,所得的8-羟基香叶醇7通过8-氧代香叶醇14和8-羟基香叶醛15被氧化成二醛8。在植物中,这种转化是通过NADP +依赖性氧化还原酶实现的。然而,在几个叶甲虫的防御性分泌物中,存在氧依赖性氧化酶。该酶催化去除C(1)-和C(8)-H R二醇7中的氢原子(重新特异性),生成8-氧代草醛8。