An Investigation of the Interaction of Co-Solvent with Substrates in the Pig Liver Esterase-Catalyzed Hydrolysis of Malonate Esters
作者:Maureen E. Smith、Michael P. C. Fibinger、Uwe T. Bornscheuer、Douglas S. Masterson
DOI:10.1002/cctc.201500597
日期:2015.10
Previously, we have reported the effect of several co‐solvents, including ethanol, on the enantioselective outcome of pig liver esterase (PLE) hydrolysis reactions. The greatest improvements were observed in those substrates that contained an atom capable of forming a hydrogen bond in the sidechain portion of the molecule. To further explore the interaction between substrate and ethanol, a second series
以前,我们已经报道了包括乙醇在内的几种助溶剂对猪肝酯酶(PLE)水解反应的对映选择性的影响。在那些底物中观察到了最大的改进,这些底物包含一个能够在分子的侧链部分形成氢键的原子。为了进一步探索底物与乙醇之间的相互作用,合成了第二系列的底物,其中侧链的氢键原子被修饰,并进行了PLE水解。包含能够形成氢键原子的基质显示出最大的平衡常数。但是,大的平衡常数并不总是如假设的那样对映选择性产生重大变化。最后,进行分子建模实验以获得对相互作用的更好理解。这些实验表明,乙醇的加入会影响底物与酶之间的相互作用。