Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
49484 | Catalysis Communications | 2015 | 4 Pages |
•We report the biosynthesis of Boc-d-Ala-OMe by B. amyloliquefaciens WZZ002.•The esterase exhibits excellent enantioselectivity and high substrate tolerance.•The e.e.s and e.e.p are greater than 99% under optimized enzymatic conditions.
A new esterase-producing strain (Bacillus amyloliquefaciens WZZ002) that exhibits high hydrolytic activity, excellent enantioselectivity, and high substrate tolerance on Boc-dl-Alanine methyl ester was isolated from soil samples. The reaction temperature, pH, and neutralizer optima of the cell-mediated biocatalysis were 35 °C, pH 8.0, and NH3·H2O, respectively. The optimal substrate concentration was 2 M, with a biocatalyst loading of 50 g/L. Results showed that the enantiomeric excess values of substrate and product were both greater than 99%. Thus, bioprocessing with the use of the isolated strain is a promising route for the commercial production of Boc-d-Ala-OMe.