Biosynthesis-Assisted Structural Elucidation of the Bartolosides, Chlorinated Aromatic Glycolipids from Cyanobacteria
作者:Pedro N. Leão、Hitomi Nakamura、Margarida Costa、Alban R. Pereira、Rosário Martins、Vitor Vasconcelos、William H. Gerwick、Emily P. Balskus
DOI:10.1002/anie.201503186
日期:2015.9.14
The isolation of the bartolosides, unprecedented cyanobacterial glycolipids featuring aliphatic chains with chlorine substituents and C‐glycosyl moieties, is reported. Their chlorinated dialkylresorcinol (DAR) core presented a major structural‐elucidation challenge. To overcome this, we discovered the bartoloside (brt) biosynthetic gene cluster and linked it to the natural products through in vitro
据报道,barloslosides是一种前所未有的蓝细菌糖脂,具有脂肪族链,具有氯取代基和C-糖基部分,可实现分离。他们的氯化二烷基间苯二酚(DAR)核心构成了主要的结构阐明挑战。为了克服这个问题,我们发现了Bartoloside(brt)生物合成基因簇,并通过形成DAR的酮合成酶和芳香化酶的体外表征将其与天然产物连接起来。生物信息学分析还揭示了一种新型的潜在卤化酶。通过定义关键的途径中间体,对巴尔妥洛糖苷生物合成的了解限制了DAR的核心结构,最终使我们能够确定巴尔妥糖苷的完整结构。这项工作说明了基因组学的强大功能,可以利用生物合成信息进行结构阐明。