氨酸脱酶的半理性工程用于增强L-tert-leucine生产
Yanqiu Liang1, Qiong Wang1, Jiapeng Lu1
1The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, PR China.
International journal of biological macromolecules
|December 7, 2024
概括
工程化氨酸脱酶 (LeuDH) 显示出对L-tert-leucine (L-Tle) 生产显著增强的活性. 这种改进的酶耐受更高的基质度,为经济高效的工业L-Tle合成铺平了道路.
科学领域:
- 生物催化剂是一种生物催化剂.
- 酶工程是什么? 酶工程是什么?
- 工业生物技术 工业生物技术
背景情况:
- 氨酸脱酶 (LeuDH) 对于L-tert-氨酸 (L-Tle) 合成至关重要.
- 目前的 LeuDH 活动向三甲基酸盐 (TMP) 发展,需要对工业应用进行改进.
研究的目的:
- 为了增强Exiguobacterium sibiricum LeuDH (EsiLeuDH) 的催化活性,用于L-Tle的生产.
- 识别和设计关键突变以提高酶的性能.
主要方法:
- 半理性的酶设计结合了同质模型和分子对接.
- 氨酸扫描,位点和突变发生和代和突变发生.
- 酶活性测定,分子对接和分子动力学模拟.
主要成果:
- 一种突变的EsiLeuDH-M3在特定活性上显示出306%的增加 (104.69 U·mg−1).
- 通过增加的键和更大的口袋,EsiLeuDH-M3表现出增强的基质结合.
- 改造的酶耐受了更高的TMP度,并在0.7M TMP时实现了91%的转化.
结论:
- 半理性设计有效地提高了L-Tle生产的EsiLeuDH性能.
- 设计的EsiLeuDH-M3为经济高效的工业L-Tle合成提供了一个有前途的生物催化剂.
- 优化的酶特性促进了更高的基质负荷和转化率.
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