<i>In Vitro</i> Reconstitution of the Remaining Steps in Ovothiol A Biosynthesis: C–S Lyase and Methyltransferase Reactions
作者:Nathchar Naowarojna、Pei Huang、Yujuan Cai、Heng Song、Lian Wu、Ronghai Cheng、Yan Li、Shu Wang、Huijue Lyu、Lixin Zhang、Jiahai Zhou、Pinghua Liu
DOI:10.1021/acs.orglett.8b02332
日期:2018.9.7
of ovothiol biosynthesis is OvoA-catalyzed oxidative coupling between histidine and cysteine. In this report, the remaining steps of ovothiol A biosynthesis were reconstituted in vitro. ETA_14770 (OvoB) was reported as a PLP-dependent sulfoxide lyase, responsible for mercaptohistidine production. OvoA was found to be a bifunctional enzyme, which mediates both oxidative C–S bond formation and methylation
卵硫醇是巯基组氨酸衍生物。卵硫醇生物合成的第一步是组氨酸和半胱氨酸之间的OvoA催化氧化偶联。在该报告中,在体外重构了硫醇A生物合成的其余步骤。据报道,ETA_14770(OvoB)是依赖PLP的亚砜裂解酶,负责巯基组氨酸的生产。发现OvoA是一种双功能酶,可介导氧化C–S键的形成和巯基组氨酸的甲基化,从而提供卵硫醇A。除了重建整个生物合成途径外,还研究了文献中提出的两个独特功能:潜在的半胱氨酸回收裂解酶(OvoB)的机理和π- N甲基转移酶的选择性。