从Rhodobacter sphaeroides通过计算指导的合理策略来设计来自Rhodobacter sphaeroides的氨酸酸酶的pH最佳值
Muhammad Waleed Iqbal1, Yiyang Shi1, Muhammad Zohaib Nawaz2
1State Key Laboratory of Chemical Resources Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
International journal of biological macromolecules
|March 23, 2025
概括
研究人员设计了氨酸氨基酶 (TAL) 的中性pH活性,这对生物炼油厂至关重要. 一个双重突变实现了显著的pH值转移和酶活性增加,为高效的p-coumaric酸生产铺平了道路.
科学领域:
- 生物催化剂是一种生物催化剂.
- 酶工程是什么? 酶工程是什么?
- 工业生物技术 工业生物技术
背景情况:
- 氨酸氨基酶 (TAL) 对于p-酸的生产至关重要.
- 当前的TAL酶在性pH (9.0-10.5) 时运行最佳.
- 生物炼油应用需要在中性pH下活跃的TAL变体.
研究的目的:
- 在中性pH下设计具有增强活性的TAL变体.
- 在中立条件下识别改善TAL性能的特定突变.
- 为了实现高效的工业生产p-酸.
主要方法:
- 为合理的酶设计提供计算指南.
- 位点定向突变发生,准表面和活性位点残留物.
- 单个和双TAL突变的pH最佳和活性的表征.
主要成果:
- 单个突变P68H,P9D和P484E将pH最佳值转移到8.0以增加活性.
- 双重突变P9D/P484E呈现了pH最佳转移到7.0.
- 双重突变P9D/P484E的活性在中性pH下增加了6倍.
结论:
- 工程 TAL 变体显示出更好的中性 pH 功能.
- 双重突变的P9D/P484E显示了工业化p-酸合成的巨大潜力.
- 这项工作支持开发可持续的生物炼油工艺.
更多相关视频
11:51Engineering 'Golden' Fluorescence by Selective Pressure Incorporation of Non-canonical Amino Acids and Protein Analysis by Mass Spectrometry and Fluorescence
Published on: April 27, 2018
11.9K
13:30A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes
Published on: November 7, 2012
17.9K
相关概念视频
01:07Catalytically Perfect Enzymes
3.8K
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...
3.8K
00:46Feedback Inhibition
53.5K
Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
53.5K