Establishing a Toolkit for Precursor-Directed Polyketide Biosynthesis: Exploring Substrate Promiscuities of Acid-CoA Ligases
作者:Maybelle Kho Go、Jeng Yeong Chow、Vivian Wing Ngar Cheung、Yan Ping Lim、Wen Shan Yew
DOI:10.1021/bi300425j
日期:2012.6.5
biosynthesized from acyl-CoA precursors by polyketide synthases. One of the limitations to combinatorial biosynthesis of polyketides has been the lack of a toolkit that describes the means of delivering novel acyl-CoA precursors necessary for polyketide biosynthesis. Using five acid-CoA ligases obtained from various plants and microorganisms, we biosynthesized an initial library of 79 acyl-CoA thioesters by screening
聚酮化合物是化学上多样化且具有医学上重要意义的生物化学物质,它们是通过聚酮化合物合酶从酰基辅酶A前体生物合成的。聚酮化合物的组合生物合成的局限性之一是缺少工具包,该工具包描述了递送聚酮化合物生物合成所必需的新型酰基-CoA前体的方法。使用从各种植物和微生物中获得的5种酸性CoA连接酶,我们通过针对123种羧酸的文库筛选每种酸性CoA连接酶,生物合成了79种酰基CoA硫酯的初始文库。酰基-CoA硫酯库包括肉桂基-CoA,3-苯基丙酰基-CoA,苯甲酰基-CoA,苯乙酰基-CoA,丙二酰-CoA,饱和和不饱和脂族CoA硫酯和双环芳族CoA硫酯的衍生物。在我们对新型酰基辅酶A前体的生物合成路线的搜索中,我们发现了两种以前未报道过的丙二酰辅酶A衍生物(3-硫代苯丙氨酰辅酶A和苯基丙二酰辅酶A),无法通过规范的丙二酰辅酶A合成酶生产。该报告强调了确定常规底物池之外底物混杂的实用性和重要性,并描述了建