Discovery and Assembly-Line Biosynthesis of the Lymphostin Pyrroloquinoline Alkaloid Family of mTOR Inhibitors in Salinispora Bacteria

详细信息    查看全文

• 作者：Akimasa Miyanaga ; Jeffrey E. Janso ; Leonard McDonald ; Min He ; Hongbo Liu ; Laurel Barbieri ; Alessandra S. Eust谩quio ; Elisha N. Fielding ; Guy T. Carter ; Paul R. Jensen ; Xidong Feng ; Margaret Leighton ; Frank E. Koehn ; Bradley S. Moore
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：August 31, 2011
• 年：2011
• 卷：133
• 期：34
• 页码：13311-13313
• 全文大小：729K
• 年卷期：v.133,no.34(August 31, 2011)
• ISSN：1520-5126

文摘

The pyrroloquinoline alkaloid family of natural products, which includes the immunosuppressant lymphostin, has long been postulated to arise from tryptophan. We now report the molecular basis of lymphostin biosynthesis in three marine Salinispora species that maintain conserved biosynthetic gene clusters harboring a hybrid nonribosomal peptide synthetase鈥損olyketide synthase that is central to lymphostin assembly. Through a series of experiments involving gene mutations, stable isotope profiling, and natural product discovery, we report the assembly-line biosynthesis of lymphostin and nine new analogues that exhibit potent mTOR inhibitory activity.