期刊
BIOCATALYSIS AND BIOTRANSFORMATION
卷 31, 期 6, 页码 299-304出版社
TAYLOR & FRANCIS LTD
DOI: 10.3109/10242422.2013.857314
关键词
Enzyme activity; enantioselectivity; N-hydroxymethyl vince lactam; lipase; ultrasound
资金
- National Natural Science Foundation of China [21172093, 31070708, 30870539]
- Scientific Research Project of Liaoning Educational Committee [L2012431]
Ultrasound has been successfully used to improve the performance of Mucor miehei lipase (MML) in enantioselective transesterifi cation of N-hydroxymethyl vince lactam with vinyl valerate as acyl donor in methyl tert-butyl ether. The effects of reaction conditions have been investigated. Under the optimum conditions (ultrasound power, 175 W; temperature, 30 degrees C; water activity, 0.22; pH, 7.0), the enzyme activity of MML was 93.7 mu mol/g/min and the enantioselectivity (E value) was 68.2. The results also indicated that the free enzyme was stable under low power ultrasound conditions.
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