Site-Specific and Asymmetric Hydrolysis of Prochiral 2-Phenyl-1,3-propanediol Diacetate by a Bacterial Esterase from an Isolated Strain
作者:Ryoji MITSUI、Seiho SHINYA、Yuichi ICHIYAMA、Kenta KUDO、Takuo TSUNO、Mitsuo TANAKA
DOI:10.1271/bbb.70019
日期:2007.8.23
of the monoacetate such that the enantiomeric excess (e.e.) of the (S)-form was over 95%. The purified enzyme from Bacillus cereus 809A hydrolyzed diacetate to monoacetate, and the e.e. value of the (S)-form increased by prolonged reaction in a way similar to the resting cell reaction. From N-terminal amino acids, this esterase is conserved in some strains of Bacillus for which the genomic sequences
蜡状芽孢杆菌809A和伯克霍尔德氏菌。从土壤中分离出711C。这些菌株表现出对手性2-苯基-1,3-丙二醇二乙酸酯的水解活性,并且将相应的手性单乙酸酯积累到反应混合物中。当将2-苯基1,3-丙二醇二乙酸酯用作底物时,产生的具有伯克霍尔德氏菌的单乙酸酯。以外消旋形式获得711C,但是蜡状芽孢杆菌809A产生的711C显示出过量的(S)形式。静息细胞反应表明,对于蜡状芽孢杆菌809A,单乙酸酯的一种对映体富集,使得(S)-形式的对映体过量(ee)超过95%。蜡状芽孢杆菌809A的纯化酶将双乙酸酯水解为单乙酸酯,(S)-形式的值通过延长的反应以类似于静止细胞反应的方式增加。在某些已经报道了基因组序列的芽孢杆菌菌株中,这种酯酶在N末端氨基酸中是保守的。