Diketopiperazine Formation in Fungi Requires Dedicated Cyclization and Thiolation Domains
作者:Joshua A. Baccile、Henry H. Le、Brandon T. Pfannenstiel、Jin Woo Bok、Christian Gomez、Eileen Brandenburger、Dirk Hoffmeister、Nancy P. Keller、Frank C. Schroeder
DOI:10.1002/anie.201909052
日期:2019.10.7
dipeptidyl precursors derived from nonribosomal peptide synthetases (NRPSs) into 2,5-diketopiperazines (DKPs) is a crucial step in the biosynthesis of a large number of bioactive natural products. However, the mechanism of DKP formation in fungi has remained unclear, despite extensive studies of their biosyntheses. Here we show that DKP formation en route to the fungal virulence factor gliotoxin requires
将源自非核糖体肽合成酶(NRPS)的线性二肽基前体环化为2,5-二酮哌嗪(DKPs)是大量生物活性天然产物生物合成中的关键步骤。然而,尽管对DKP的生物合成进行了广泛的研究,但仍不清楚其在真菌中形成DKP的机制。在这里,我们显示到真菌毒性因子胶质毒素的途中DKP的形成需要在NRPS GliP中出现一个看似无关的缩合(C)和硫醇化(T)域。体内截短GliP以去除CT联结或仅T结构域消除了胶质毒素和所有其他gli途径代谢产物的产生。C和T域中的保守活性位点的点突变减少了体外GliP的环化活性,并废除了体内的胶质毒素生物合成。