Journal of Tropical Oceanography >
The effects of different cell breaking methods on the asymmetrical hydrolysis of phenylethyl acetate using intracellular proteases of Bacillus sp. DL-2
Copy editor: YIN Bo
Received date: 2020-04-15
Request revised date: 2020-05-12
Online published: 2020-06-01
Supported by
Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)(GML2019ZD0406)
Natural Science Foundation of Guangdong Province of China(2018A030313151)
Scientific and Technological Project of the Ocean and Fishery from Guangdong Province of China(A201701C12)
Priority Research Program of the Chinese Academy of Sciences(XDA11030404)
Senior User Project of the Research Vessel KEXUE(KEXUE2018G05)
Copyright
(R)-1-phenylethanol is a key chiral building block in the synthesis of chiral drugs, and plays important roles in the synthesis of many chiral compounds and in the industrial production of medicines and spices. The strain Bacillus sp. DL-2 screened from the deep-sea sediments of the western Pacific Ocean was broke, and the obtained intracellular proteases can asymmetrically hydrolyze (±)-1-phenylethyl acetate to obtain (R)-1-phenylethanol. Three different ways, namely, surfactant, lysozyme and ultrasonic, were utilized to crush Bacillus sp. DL-2. After the optimizations of the surfactant and lysozyme crushing methods, the optimal working conditions were found to be 0.5% TritonX-100, 35 ℃ and pH 7.0 for 2 h. After process optimization, (R)-1-phenylethanol was obtained with an enantiomeric excess of 96% and a conversion of 23%, which provide reference for using intracellular proteases to produce chiral chemicals.
Key words: surfactant; lysozyme; ultrasonication; kinetic resolution; (R)-1-phenylethanol
WANG Xiaomin , DONG Lu , ZHANG Jifu , ZHANG Yun , HU Yunfeng . The effects of different cell breaking methods on the asymmetrical hydrolysis of phenylethyl acetate using intracellular proteases of Bacillus sp. DL-2[J]. Journal of Tropical Oceanography, 2021 , 40(2) : 39 -48 . DOI: 10.11978/2020041
图3 胞内蛋白酶拆分乙酸苏合香酯色谱图a. 标准品; b. 优化后的表面活性剂TritonX-100破碎细胞获取胞内酶拆分色谱图; c. 优化后的溶菌酶破碎细胞获取胞内酶拆分色谱图; d. 超声破碎获取胞内酶拆分色谱图。红色代表S型乙酸苏合香酯及相应的醇, 蓝色代表R-乙酸苏合香酯及相应的醇 Fig. 3 The gas chromatogram of asymmetric hydrolysis of (±)-1-phenylethyl acetate by intracellular proteases (a) Standards of (±)-1-phenylethyl acetate and (±)-1-phenylethanol, (b) surfactant TritonX-100, (c) lysozyme, and (d) ultrasonication. The red color represents (S)-phenylethyl acetate and (S)-1-phenylethanol, and the blue color represents (R)-phenylethyl acetate and (R)-1-phenylethanol |
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