Geissoschizine synthase controls flux in the formation of monoterpenoid indole alkaloids in a Catharanthus roseus mutant
作者:Yang Qu、Antje M. K. Thamm、Matthew Czerwinski、Sayaka Masada、Kyung Hee Kim、Graham Jones、Ping Liang、Vincenzo De Luca
DOI:10.1007/s00425-017-2812-7
日期:2018.3
species and is a valuable source for several monoterpenoid indole alkaloids (MIAs), such as the powerful antihypertensive drug ajmalicine and the antineoplastic agents, vinblastine and vincristine. While biosynthesis of the common MIA precursor strictosidine and its reactive aglycones has been elucidated, the branch point steps leading to the formation of different classes of MIAs remain poorly characterized
摘要主要结论ACatharanthus roseusmutant 以长春花碱和vindoline 为代价积累了高水平的ajmalicine。改变的化学性质依赖于胡桃苷 β-葡萄糖苷酶和阿马利辛合酶活性的表达和生化活性增加,以及 geissoschizine 合酶的表达和生化活性降低。马达加斯加长春花 [Catharanthus roseus (L.) G. Don] 是一种商业上重要的园艺花卉物种,并且是几种单萜吲哚生物碱 (MIA) 的宝贵来源,例如强效抗高血压药物 ajmalicine 和抗肿瘤剂长春碱和长春新碱. 虽然已经阐明了常见的 MIA 前体核苷及其反应性糖苷配基的生物合成,导致形成不同类别 MIA 的分支点步骤仍然缺乏特征。使用简单的薄层色谱筛选筛选 3600 甲基磺酸乙酯诱变的 C.roseus 植物产生了一个突变体 (M2-0754),该突变体积累了高水平的 ajmalicine