由N-甘化修饰驱动的结构动力学减弱了d-lactonohydrolase的基质抑制
Ruobin Sun1, Qipeng Yan2, Wenhao Deng3
1School of Biotechnology and Key Laboratory of Industrial Biotechnology of Education, School of Biotechnology, Jiangnan University, Wuxi 214122 China.
Bioorganic chemistry
|January 9, 2025
概括
在真核宿主中,d-lactonohydrolase (d-Lac) 的糖化减少了高度的酶基质抑制,通过调节活性位点循环的灵活性. 这提高了工业应用的生物催化效率.
科学领域:
- 生物催化剂是一种生物催化剂.
- 酵素工程是什么意思 酵素工程
- 蛋白质糖基化蛋白质的糖基化.
背景情况:
- 在高度下抑制酶基质挑战了工业生物催化剂.
- 糖化在调节酶基质抑制中的作用尚不清楚.
研究的目的:
- 调查N-糖化对基质抑制d-lactonohydrolase (d-Lac) 的影响.
- 为了比较d-Lac在原生和真核宿主中表达的催化性质.
主要方法:
- 在Pichia pastoris (真核生物) 和大肠杆菌 (原核生物) 中,d-Lac的重组表达.
- 在高基质度下进行酶动力学测定.
- 蛋白质组学分析以确定糖化位.
- 微秒分子动力学模拟和马尔科夫状态模型.
- 最短路径地图分析.
主要成果:
- 与大肠杆菌 (EcLac-WT) 相比,来自P. pastoris的重组d-Lac (PpLac-WT) 显示出更高的水解速率,降低了基质抑制,并提高了稳定性.
- 在PpLac-WT中,N-糖化发生在N29和N278残留物中.
- 模拟显示PpLac-WT循环在开放/关闭状态之间过渡,而EcLac-WT循环保持开放,减轻高度基质抑制.
- 突变型PpLac-M1在400g/L基底下实现了40%的转化.
结论:
- 通过控制活性位点循环动态,N-糖化增强了酶的稳定性,并减少了基质抑制.
- 这项研究为高基质度的酶性能提供了对糖基化作用的机制性理解.
- 这些发现为工程酶提供了策略,以减轻工业生物催化物的抑制.
关键词:
符合性的动态学.葡萄糖基酶化是什么? 葡萄糖基酶化的方法马尔科夫状态模型的模型.分子动力学分子动力学蛋白质组学是指蛋白质组学.基质抑制 基质抑制d-Lactonohydrolase 的使用情况更多相关视频
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