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来自Dictyoglomus thermophilum的纤维素-2-胺酶的循环工程,用于有效合成乳糖

Zun Tao¹, Long-Tao Wang¹, Wei-Jie Tang¹

¹School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China.

International journal of biological macromolecules

|February 14, 2025

概括

经过工程设计的纤维素-2-表皮酶 (CE) 酶显示出显著增强的乳糖生产. 这一突破改善了乳糖的生物合成,乳糖是一种有价值的制药和益生菌化合物.

科学领域:

生物技术是生物技术.
酵素工程是什么? 酶工程是什么
碳水化合物化学碳水化合物化学

背景情况:

乳糖是一种有价值的药物和益生菌,具有多种应用.
纤维素2-表皮酶 (CE) 是环保乳糖生物合成的关键.
野生类型的CE表现出有限的异构活性,阻碍了工业乳糖生产.

研究的目的:

为了增强纤维素-2-表皮酶 (CE) 的异构化活性,以改善乳糖合成.
从Dictyoglomus thermophilum (DtCE) 来设计CE,以提高乳糖生产效率.
调查工程CE中增强异构化活动的结构基础.

主要方法:

利用循环工程策略,结合计算机辅助设计和定向进化.
用修改的灵活循环生成和特征DtCE突变 (M4和M5).
采用分子动力学模拟来分析循环修改对酶功能的影响.

主要成果:

改造的DtCE突变M4和M5显示出显著增加的异构化活性 (分别为46.5%和81.8%).
突变的表皮化活性大幅下降 (80.0%为M4,50.0%为M5),提高了乳糖合成的特异性.
分子动力学模拟显示,循环修改影响了质子化和改善了异构化选择性.

结论:

与野生类型酶相比,工程DtCE突变体在乳糖合成方面表现优越.
这项研究表明了酶工程的有效方法,以优化工业生化过程.
这项工作为大规模的乳糖生物合成生产提供了基础.

关键词:

催化效率催化效率催化效率蜂酸2-皮酶酶是什么?灵活的循环循环可以乳糖糖是什么乳糖是什么乳糖是什么蛋白质工程是一种蛋白质工程.

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