一种水友金属酸协调聚合物,用于在现场封装Haloalkane脱基酶,增强酶性能
1Department of Biochemical Engineering, School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin 300350, China.
在以为基础的协调聚合物中与PVP和氨酸固定甲基脱酶DhaA,大大提高了它的活性和稳定性. 这种新的DhaA/PVP/Lys@CoCP为工业应用提供了卓越的性能.
科学领域:
- 生物催化剂是一种生物催化剂.
- 材料科学 材料科学 材料科学
- 酶工程是什么? 酶工程是什么?
背景情况:
- 在恶劣的工业条件下,酶性能往往受到限制.
- 在像ZIF-8这样的金属有机框架中封装酶可以增强稳定性,但可能会由于连接体和金属离子相互作用而降低活性.
- 甲基脱酶DhaA的活性对其封装环境特别敏感.
研究的目的:
- 为了克服 ZIF-8 中 DhaA 封装的局限性.
- 设计一个改进的固定酶系统,以提高DHA的活性和稳定性.
- 研究共封装材料的保护和增强作用.
主要方法:
- 计算机辅助模拟来分析酶 - 配体相互作用.
- 实验设计涉及DhaA与聚乙烯 (PVP) 和 (Lys) 在基于的金属酸协调聚合物 (CoCP) 中的联合封装.
- 固定酶的活性,热稳定性,有机溶剂中的催化性能和可回收性.
主要成果:
- 封装在ZIF-8中的DhaA由于疏水性联体和不利的金属离子而显著减少活性.
- 与DhaA@ZIF-8.0相比,新的DhaA/PVP/Lys@CoCP系统的活动增加了91.5倍.
- 提高了热稳定性 (50-70°C),在有机溶剂中提高了性能,并在10个循环后保持了75%以上的活性.
- CoCP 的高水友性和 Co2+ 的使用有助于增强酶性能.
结论:
- 在CoCP中将DhaA与PVP和Lys联合封装,为酶固定提供了一个高度有效的策略.
- 开发的固定酶表现出卓越的催化活性,稳定性和可回收性.
- 这项研究提出了一个有前途的生物催化剂,具有工业应用的巨大潜力.
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