通过在金属有机框架内的封装来提高酶活性,孔与酶大小和形状相匹配
Ying Liu1, Ziman Chen1, Zheng Wang1
1State Key Laboratory of Organic-Inorganic Composites, National Energy Research and Development Center for Biorefinery, International Joint Bioenergy Laboratory of Ministry of Education, Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|April 5, 2024
概括
使用量身定制的中孔性材料进行物理印记显著提高了酶活性和稳定性. 封装酶在恶劣条件下表现出了显著的性能和高的催化效率,为酶固定提供了一条新的途径.
科学领域:
- 生物催化和酶工程 生物催化和酶工程
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 酶固定对于工业应用至关重要,但在保持高活性和稳定性方面经常面临挑战.
- 现有的方法难以提供最佳的微环境,在各种条件下增强酶性能.
研究的目的:
- 引入一种新的"物理印记"策略,使用半孔材料来增强酶活性和稳定性.
- 研究酶和中孔载体之间的尺寸和形状互补性对催化性能的影响.
主要方法:
- 金属有机框架 (MOF) 的合成,精确定制的中介孔与酶尺寸相匹配.
- 在这些定制的中孔结构中封装酶.
- 使用各种光谱技术 (UV-vis,EPR,FTIR,固态NMR) 进行酶活性,稳定性和催化效率的表征.
主要成果:
- 与自由酶相比,被封装在量身定制的中位孔中的酶表现出超过1670%的相对活性.
- 固定酶在18个循环后保持了80%的活性,并且在热量,有机溶剂和极端pH下表现出增强的稳定性.
- 观察到催化效率 (kcat/KM) 增加了14.1倍,是固定酶报告的最高效率之一.
结论:
- 尺寸和形状相辅相成的半孔体内物理印记是一种高度有效的提高酶性能的策略.
- 这种方法为开发用于酶固定化的先进固体载体提供了一条通用的新途径.
- 该研究强调了微环境工程对生物催化剂开发的重要性.
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