Flexibility of Lipase Brought About by Solvent Effects Controls Its Enantioselectivity in Organic Media
作者:Shin-ichi Ueji、Tomohiko Taniguchi、Takashi Okamoto、Keiichi Watanabe、Yasuhito Ebara、Hitoshi Ohta
DOI:10.1246/bcsj.76.399
日期:2003.2
of the enantioselectivity of Candida rugosa lipase was investigated in the esterification of 2-(4-substituted phenoxy)propionic acids with 1-butanol in aliphatic, aromatic, and ethereal solvents. The observed enantioselectivity (E value) was greatly affected by the solvent nature. Two key solvent characteristics, dielectric constant (e) and hydrophobicity (log P), failed to explain the solvent effects
2-(4-取代苯氧基)丙酸与 1-丁醇在脂肪族、芳香族和醚类溶剂中的酯化反应中研究了假丝酵母脂肪酶的对映选择性行为。观察到的对映选择性(E 值)受溶剂性质的影响很大。两个关键的溶剂特性,介电常数 (e) 和疏水性 (log P),未能解释溶剂对 E 值的影响。另一方面,发现 E 值的变化与溶剂效应带来的脂肪酶灵活性成功相关,其灵活性是通过自旋标记脂肪酶的 ESR 测量来估计的。尽管有机化学家通常应该在生物催化不对称拆分中进行溶剂筛选步骤,