Aspyrone biosynthesis in Aspergillus melleus: identification of the intermediates formed on the polyketide synthase (PKS) in the first chain extension cycle leading to crotonate
作者:Adam Jacobs、James Staunton、Andrew C. Sutkowski
DOI:10.1039/c39910001113
日期:——
Incorporation studies, using intact cells of Aspergillus melleus and deuterium labelled precursors in association with 2H NMR spectroscopy as method of analysis, have shown that the enzyme-bound intermediates generated in the first two steps of the chain extension cycle catalysed by the aspyrone polyketide synthase (PKS) are thioesters of acetoacetic acid and (R)-3-hydroxybutyric acid.
结合研究使用完整的美洲曲霉细胞和氘标记的前体,结合2H NMR光谱作为分析方法,结果表明,在由aspyrone多肽合成酶(PKS)催化的链延伸循环的前两个步骤中产生的酶结合中间体是乙酰乙酸和(R)-3-羟基丁酸的硫酯。