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  • Title: Kinetic resolution of ketoprofen ester catalyzed by lipase from a mutant of CBS 5791.
    Author: Liu J, Zhang Y, Qiu Lh, Yang F, Ye L, Xia Y.
    Journal: J Ind Microbiol Biotechnol; 2004 Dec; 31(11):495-9. PubMed ID: 15538656.
    Abstract:
    A biotransformation process was developed for the production of (S)-ketoprofen by enantioselective hydrolysis of racemic ketoprofen ester using the mutant Trichosporon laibacchii strain CBS 5791. A satisfactory result was obtained, in which the E was 82.5, with an ee of 0.94 and a conversion of 0.47 under the optimum hydrolysis conditions [E is enantiomeric ratio, E=ln[1-X(1+ee)]/ln[1-X(1-ee)]; ee is enantiomeric excess, ee=(CS-CR)/(CS+CR): temperature of hydrolysis was 23 degrees C]. The medium used in biotransformation was a mixture of growth broth and biotransformation broth at a ratio of 1:9, the concentration of Tween 80 was 15 g/l, the time of hydrolysis, 72 h. These results are promising for further scale-up. Tween 80 significantly improved lipase enantioselectivity and activity at the optimum concentration.
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