Engineering of carbonyl reductase for asymmetric reduction of difficult-to-reduce ketone tetrahydrofuran-3-one
作者:Ya-Ping Lin、Bing-Mei Su、Juan Lin
DOI:10.1016/j.mcat.2023.113466
日期:2023.9
3TF using isopropanol as co-substrate (500 mM, 22 g/L/h space-time yield, 67% ee). Based on the orientation of substrate's etheryl oxygen in the substrate binding pocket, CmCR was rationally designed and two mutants MuR and MuS were screened out to completely reduce 3TF into (R)-HTF and (S)-HTF respectively with the highest 3TF loading and productivity (200 mM, 4.4 g/L/h space-time yield, 99% ee for
四氢呋喃-3-酮(3TF)因其高度立体对称性而被认为是羰基还原酶难以还原的酮,因此,生物合成手性3-羟基四氢呋喃(3HTF)是治疗糖尿病药物的关键前体。 HIV或糖尿病,已受到限制。目前的研究使用异丙醇作为共底物(500 mM,22 g/L/h 时空产率,67% ee),从念珠菌化生中挖掘出一种对 3TF 具有高活性的强大羰基还原酶 CmCR 。根据底物结合口袋中底物醚氧的取向,合理设计CmCR,筛选出两个突变体MuR和MuS,将3TF完全还原为( R )-HTF和( S))-HTF 分别具有最高的 3TF 负载量和生产率( MuR 为200 mM,4.4 g/L/h 时空产率,99% ee,而500 mM,11 g/ L /h 时空产率,99% ee )穆斯)。揭示了立体选择性增强的结构机制:诱变改变了底物入口周围的静电势,促进3TF与MuR或MuS在某一方向接近、结合并形成预反应状态,