在人工酶中进行远端突变的计算引导工程
Fabrizio Casilli1, Miquel Canyelles-Niño2, Gerard Roelfes1
1Stratingh Institute for Chemistry, University of Groningen, 9747 AG, Groningen, The Netherlands. j.g.roelfes@rug.nl.
Faraday discussions
|June 5, 2024
概括
提高人工酶催化剂涉及工程蛋白质动力学. 人工酶的远端突变通过改变蛋白质构造来提高其催化率和稳定性,为工业应用铺平了道路.
科学领域:
- 生物催化剂是一种生物催化剂.
- 蛋白质工程是指蛋白质工程.
- 酶动力学 酶动力学
背景情况:
- 人工酶为新型反应提供精确的,选择性的生物催化剂.
- 它们的催化率往往落后于自然酶,限制了工业用途.
- 目前的设计专注于活跃部位,忽视了蛋白质动态.
研究的目的:
- 通过准蛋白质动态来增强人工酶的性能.
- 为了研究远端突变对酶催化物的影响.
- 提高工程生物催化剂的催化速率和稳定性.
主要方法:
- 利用一种创新的算法来选影响蛋白质动态的突变.
- 基于乳球球菌多药耐药性调节器 (LmrR) 设计了一种人工酶.
- 采用微秒分子动力学模拟来分析形状变化.
主要成果:
- 确定了两种远端变异,突变>11 Å 从活性部位.
- 在重组变体中实现了66%的更高周转率和14°C的更高的热稳定性.
- 由于远端突变,观察到生产性酶构造的变化.
结论:
- 远端突变可以显著提高人工酶的催化性能.
- 蛋白质动态在优化酶功能的过程中起着至关重要的作用.
- 这种方法为开发高效的工业生物催化剂提供了新的战略.
相关概念视频
01:07Catalytically Perfect Enzymes
4.0K
The theory of catalytically perfect enzymes was first proposed by W.J. Albery and J. R. Knowles in 1976. These enzymes catalyze biochemical reactions at high-speed. Their catalytic efficiency values range from 108-109 M-1s-1. These enzymes are also called 'diffusion-controlled' as the only rate-limiting step in the catalysis is that of the substrate diffusion into the active site. Examples include triose phosphate isomerase, fumarase, and superoxide dismutase.
Most enzymes...
Most enzymes...
4.0K
02:53Conservative Site-specific Recombination and Phase Variation
6.0K
Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...
The recognition sites for Cre recombinase called LoxP...
6.0K