通过FoldX和KnowVolution竞选活动的结合,提高ulvan lyase的热稳定性和催化活性
Ailan Huang1, Zhengqi Chen1, Xinming Wu1
1College of Biotechnology, Tianjin University of Science & Technology, Tianjin, PR China.
International journal of biological macromolecules
|December 9, 2023
概括
蛋白质工程使用计算方法和定向进化改进了ulvan lyase的热稳定性和活性. N57P/Q229M突变体在藻类生物质降解方面表现更好.
科学领域:
- 生物技术是生物技术.
- 酶工程是什么? 酶工程是什么?
- 蛋白质工程是指蛋白质工程.
背景情况:
- 热稳定性对于藻生物质降解中的ulvan lyase应用至关重要.
- 蛋白质工程策略,如获得知识的定向eVolution (KnowVolution),可以提高酶的热稳定性.
- 需要有效的选方法来提高ulvan lyase性能.
研究的目的:
- 通过蛋白质工程来提高ulvan lyase的热稳定性和活性.
- 为了确定有利于增强酶性能的有益突变.
- 为了平衡热稳定性和酶活性,用于实际应用.
主要方法:
- 使用FoldX位置扫描模块来预测展开的自由能量 (ΔΔG).
- 针对突变发生的目标部位选择 (D103,G104,T113,Q229).
- 代突变是将以前识别的突变 (N57P) 与新发现的突变 (例如,Q229M) 结合在一起的.
- 酶活性测定和分子动力学模拟以分析结构和功能变化.
主要成果:
- 鉴定了一个有利的单位突变Q229M.
- 双重突变N57P/Q229M在热处理 (40°C和50°C) 后显著增加其余活性.
- 与野生类型相比,N57P/Q229M变种的糖产量减少率增加了四倍.
- 分子动力学模拟表明突变体的结构刚性增强和催化机制改善.
结论:
- 使用FoldX在度和突变发生加速了对热稳定突变的选.
- 将计算选与KnowVolution相结合,可以实现热稳定性和酶活性之间的平衡.
- 工程化乌尔万酶变体N57P/Q229M证明了对高效的藻类生物质降解的潜力.
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