Biosynthesis of trichothecene mycotoxins: Identification of isotrichodiol as a post-trichodiene intermediate
作者:Andrew R. Hesketh、Linden Gledhill、David C. Marsh、Barrie W. Bycroft、Paul M. Dewick、John Gilbert
DOI:10.1016/0031-9422(91)83621-q
日期:1991.1
precursor of the trichothecenes, and represents the first demonstrated post-trichodiene intermediate in the pathway to trichothecenes. Slow, acid-catalysed cyclization of isotrichodiol to EPT was demonstrated, but the rapid in vivo incorporation into EPT points to an enzyme-catalysed process in the fungus. The biosynthesis of oxygenated trichothecenes such as 3-acetyldeoxynivalenol in F. culmorum appears
摘要 当用呋喃香豆素黄毒素处理 Fusarium culmorum CMI 14764 培养物时,单端孢霉烯的生物合成受到抑制,大量单端孢霉烯积累,以及少量 12,13-epoxytrichothec-9-ene (EPT) 和异木霉烯。单端孢霉烯被证明是 F. culmorum 中单端孢霉烯真菌毒素的前体,当供应大量单端孢霉烯时,发现新的单端孢霉烯代谢物异端霉二醇积累。这种化合物 12,13-epxoy-2α,11α-二羟基单端孢霉烯被证明是单端孢霉烯的生物合成前体,并且代表了单端端孢霉烯途径中第一个被证明的后单端孢霉烯中间体。证明了异丁二醇缓慢、酸催化环化为 EPT,但在体内快速掺入 EPT 表明真菌中存在酶催化过程。F. culmorum 中含氧单端孢霉烯(例如 3-乙酰脱氧雪腐镰刀菌烯醇)的生物合成似乎需要在环化之前进一步 3-羟基化为异三端孢三醇。