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首页> 外文期刊>Bioprocess and Biosystems Engineering >Improvement of catalytic activity of lipase in the presence of calix[4]arene valeric acid or hydrazine derivative
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Improvement of catalytic activity of lipase in the presence of calix[4]arene valeric acid or hydrazine derivative

机译：在杯[4]芳烃戊酸或肼衍生物存在下改善脂肪酶的催化活性

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摘要

Sol-gel encapsulation is a simple but powerful method to enhance the enantioselectivity of lipase-cata-lyzed transformations in an isooctane/aqueous buffer solution. Candida rugosa lipase was encapsulated according to a sol-gel procedure in the presence and absence of calix[4]arene hydrazine or carboxylic acid derivatives with Fe_3O_4 magnetic nanoparticles as an additive. The activity of the encapsulated lipases was evaluated for the enantio-selective hydrolysis of racemic Naproxen methyl ester and the hydrolysis of p-Nitrophenylpalmitate. The results indicate that the encapsulated lipase without calix[4]arene derivative has lower conversion and enantioselectivity compared to the encapsulated lipase with calix[4]arene derivative. It was found that the calix[4]arene hydrazine and carboxylic acid-based encapsulated lipases have excellent activity and enantioselectivity (E ＞300) compared to encapsulated lipase without the calix[4]arene derivatives.
机译：溶胶-凝胶封装是一种简单但有效的方法，可以提高在异辛烷/水性缓冲溶液中脂肪酶催化的转化的对映选择性。在存在和不存在杯[4]亚芳基肼或羧酸衍生物的情况下，根据溶胶-凝胶程序，以Fe_3O_4磁性纳米粒子为添加剂，将皱纹假丝酵母脂肪酶包囊。对于外消旋萘普生甲酯的对映选择性水解和对硝基硝基棕榈酸酯的水解，评估了包封的脂肪酶的活性。结果表明，与带有杯[4]芳烃衍生物的胶囊化脂肪酶相比，没有杯[4]芳烃衍生物的胶囊化脂肪酶具有较低的转化率和对映选择性。结果发现，与没有杯[4]芳烃衍生物的包封脂肪酶相比，杯[4]芳烃肼和羧酸基包封的脂肪酶具有优异的活性和对映选择性（E＞ 300）。

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