The Biosynthesis of Spinosyn in <i>Saccharopolyspora </i><i>spinosa</i>: Synthesis of the Cross-Bridging Precursor and Identification of the Function of SpnJ
作者:Hak Joong Kim、Rongson Pongdee、Qingquan Wu、Lin Hong、Hung-wen Liu
DOI:10.1021/ja076580i
日期:2007.11.28
of the spinosyn aglycone suggests an intriguing biosynthetic pathway for its formation, which is expected to be initiated by the oxidation of the 15-OH group of the mature polyketide precursor and may involve a Diels-Alder-type [4 + 2] cycloaddition reaction. Three possible routes, which differ in the order of oxidation and cyclization events, can be envisioned for the biosynthesis of the core structure