Complexity Generation in Fungal Peptidyl Alkaloid Biosynthesis: Oxidation of Fumiquinazoline A to the Heptacyclic Hemiaminal Fumiquinazoline C by the Flavoenzyme Af12070 from <i>Aspergillus fumigatus</i>
作者:Brian D. Ames、Stuart W. Haynes、Xue Gao、Bradley S. Evans、Neil L. Kelleher、Yi Tang、Christopher T. Walsh
DOI:10.1021/bi201302w
日期:2011.10.11
The trimodular NRPS Af12080 assembles FQF (the first level of complexity) while the next two enzymes, Af12060 and Af12050, act in tandem in an oxidative annulation sequence to couple alanine to the indole side chain of FQF to yield the imidazolindolone-containing FQA. In this study we show that the fourth enzyme, the monocovalent flavoprotein Af12070, introduces a third layer of scaffold complexity