了解离子液体介导溶剂工程对氨氨氨酸氨基酶的动力学和热力学稳定性的影响
Pranav Bharadwaj1,2, Avishak Barua1, Meena Bisht1,3
1Institute of Plant Genetics (IPG), Polish Academy of Sciences, Poznań 60-479, Poland.
The journal of physical chemistry. B
|September 13, 2024
概括
离子液体增强了用于工业生物催化剂的氨氨酶 (PAL) 的稳定性和活性. 这种酶工程方法改善了反应动力学和在恶劣条件下的酶弹性.
科学领域:
- 生物催化剂是一种生物催化剂.
- 酵素工程是什么意思 酵素工程
- 蛋白质稳定 蛋白质稳定
背景情况:
- 氨氨酸酶 (PAL) 对于烯胺路径和基尿治疗至关重要.
- 在工业条件下PAL的不稳定性限制了其生物催化应用.
研究的目的:
- 为了提高Rhodotorula glutinis PAL (RgPAL) 的反应动力学和热力学稳定性,使用离子液 (IL) 辅助溶剂工程.
- 为可持续的工业应用开发一个强大的基于PAL的生物催化系统.
主要方法:
- 工程RgPAL稳定性和动力学使用与Tris-HCl缓冲器混合的离子液体 (IL) ([Ch][Ac]).
- 在各种压力条件下评估酶活性,储存稳定性和热稳定性.
- 使用光谱和分子对接技术来阐明稳定机制.
主要成果:
- 优化的IL辅助溶剂工程导致RgPAL的Kcat值提高了66.2%.
- >60%的活性在存储5周后保留,在60°C下1小时后>80%的活性.
- ILs增强了RgPAL的化温度 (Tm) 并改变了展开的热力学,表明稳定性增加.
结论:
- 通过IL介导的溶剂工程显著增强了RgPAL的微环境,从而提高了稳定性和活性.
- 这种方法使得基于PAL的生物催化系统能够开发出强大且可行的工业化生物催化系统.
- 该研究提供了对适用于恶劣工业环境的稳定酶的见解.
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