Transformations of cyclic nonaketides by Aspergillus terreus mutants blocked for lovastatin biosynthesis at the lovA and lovC genes
作者:John L. Sorensen、Karine Auclair、Jonathan Kennedy、C. Richard Hutchinson、John C. Vederas
DOI:10.1039/b207721c
日期:2003.12.19
Two mutants of Aspergillus terreus with either the lovC or lovA genes disrupted were examined for their ability to transform nonaketides into lovastatin 1, a cholesterol-lowering drug. The lovC disruptant was able to efficiently convert dihydromonacolin L 5 or monacolin J 9 into 1, and could also transform desmethylmonacolin J 15 into compactin 3. In contrast, the lovA mutant has an unexpectedly active
检查了具有lovC或lovA基因被破坏的两个曲霉曲霉突变体的能力,这些突变体可将九肽转化为洛伐他汀1(一种降胆固醇药物)。lovC破坏剂能够有效地将二氢莫纳可林L 5或莫纳可林J 9转化为1,还可以将去甲基莫纳可林J 15转化为紧致蛋白3。相反,lovA突变体具有意想不到的活性β-氧化系统,仅产生少量的1在加入直接前体9后,大部分添加的非核苷酸都降解为庚肽22。类似地,lovA突变体不会积聚聚酮化合物合酶产物5,并通过两个β-氧化和β-环化反应迅速降解了作为前体添加的任何5。在C-6处羟基化得到20。