工程 7β-HSDH_Osp 提高催化效率:促进ursodeoxycholic 酸的可持续生物合成
Haiquan Yang1, Yingzi Chen1, Wanlong Liu1
1School of Biotechnology and Key Laboratory of Carbohydrate Chemistry and Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, China.
Bioresource technology
|December 25, 2025
概括
经过工程设计的7β-基类固醇脱酶 (7β-HSDH) 酶显著提高了用于生产ursodeoxycholic acid (UDCA) 的催化效率. 这种生物催化剂实现了高产量,为工业规模的UDCA合成提供了可持续和高效的方法.
科学领域:
- 生物催化和酶工程 生物催化和酶工程
- 类固醇的化学成分
- 制药制造业 制药制造业 制药制造业
背景情况:
- Ursodeoxycholic 酸 (UDCA) 是一种重要的制药剂.
- 使用7β-基类固醇脱酶 (7β-HSDH) 的生物催化合成是UDCA生产的关键.
- 提高7β-HSDH的催化效率对于工业应用至关重要.
研究的目的:
- 通过定向进化和蛋白质工程来提高7β-HSDH_Osp的催化效率.
- 开发一种强大的生物催化剂,用于高效和可持续的工业规模的UDCA生产.
主要方法:
- 在活动部位附近的7β-HSDH_Osp残留物上进行了定向部位和突变发生.
- 高通量查发现了改进的酶变体.
- 使用了代突变,运动分析,分子对接和动力学模拟.
- 使用了优化的反应条件和一合成策略.
主要成果:
- 改造的7β-HSDH_Osp变种表现出显著增加的特异活性,最好的突变体比野生类型增加了5.79倍.
- 观察到基质亲和度 (Km) 和催化效率 (kcat/Km) 的提高.
- 分子模拟表明增强了基质结合和结构灵活性.
- 一次性将CDCA转换为UDCA的转换实现了创纪录的94.3%的收益率.
结论:
- 设计的7β-HSDH_Osp变体是一种高效和强大的生物催化剂.
- 这种方法为UDCA生产提供了增强的工艺效率和环境兼容性.
- 该研究表明,可持续的工业规模UDCA制造具有显著的潜力.
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