Production of New Cladosporin Analogues by Reconstitution of the Polyketide Synthases Responsible for the Biosynthesis of this Antimalarial Agent
作者:Rachel V. K. Cochrane、Randy Sanichar、Gareth R. Lambkin、Béla Reiz、Wei Xu、Yi Tang、John C. Vederas
DOI:10.1002/anie.201509345
日期:2016.1.11
in Saccharomyces cerevisiae produced cladosporin, confirming the identity of the putative gene cluster. Incorporation of a pentaketide intermediate analogue indicated a 5+3 assembly by the HR PKS Cla2 and the NR PKS Cla3 during cladosporin biosynthesis. Advanced‐intermediate analogues were synthesized and incorporated by Cla3 to furnish new cladosporin analogues. A putative lysyl‐tRNA synthetase resistance
抗疟药cladosporin是恶性疟原虫lysyl-tRNA合成酶的纳摩尔抑制剂,对血液和肝阶段感染均表现出活性。可以从真菌Cladosporium cladosporioides中分离出Cladosporin,并通过高度还原(HR)和非还原(NR)迭代I型聚酮化合物合酶(PKS)对进行生物合成。酿酒酵母中宿主生物的基因组测序及其后这些酶的异源表达产生了cladosporin,证实了推定基因簇的身份。戊肽中间体类似物的掺入表明在clasosporin生物合成过程中,HR PKS Cla2和NR PKS Cla3有5 + 3组装。合成了高级中间体类似物,并由Cla3掺入,以提供新的cladosporin类似物。在cladosporin基因簇中鉴定出一个假定的lysyl-tRNA合成酶抗性基因。对活性部位的分析强调了关键的结构特征,这些结构特征被认为对cladosporin具有抗性。