Identification of the Formycin A Biosynthetic Gene Cluster from <i>Streptomyces kaniharaensis</i> Illustrates the Interplay between Biological Pyrazolopyrimidine Formation and <i>de Novo</i> Purine Biosynthesis
作者:Shao-An Wang、Yeonjin Ko、Jia Zeng、Yujie Geng、Daan Ren、Yasushi Ogasawara、Seema Irani、Yan Zhang、Hung-wen Liu
DOI:10.1021/jacs.9b00241
日期:2019.4.17
cosmid is identified from the Streptomyces kaniharaensis genome library that contains the for gene cluster responsible for the biosynthesis of formycin. Subsequent gene deletion experiments and in vitro characterization of the forBCH gene products established their catalytic functions in formycin biosynthesis. Results also demonstrated that PurH fromdenovo purine biosynthesis plays a key role in pyrazolopyrimidine
Formycin A 是一种有效的嘌呤核苷抗生素,在核糖基部分和吡唑并嘧啶碱基之间具有 C-糖苷键。在此,从卡尼哈拉链霉菌基因组文库中鉴定出粘粒,其含有负责福霉素生物合成的基因簇。随后的基因缺失实验和 forBCH 基因产物的体外表征确定了它们在福霉素生物合成中的催化功能。结果还表明,来自嘌呤从头生物合成的 PurH 在福霉素 A 生物合成过程中吡唑并嘧啶的形成中起着关键作用。PurH 在这两种途径中的参与代表了初级和次级代谢如何相互关联的一个很好的例子。