丧动力学和电子转移重组能量在野生类型和突变青中
Xun Chen1,2, Mingchen Chen1, Peter G Wolynes1,2,3
1Center for Theoretical Biological Physics, Houston, Texas 77005, United States.
Journal of the American Chemical Society
|February 16, 2022
概括
蓝色蛋白质中的电子转移依赖于进化调节. 在铜位附近增加的蛋白质"丧"会减缓电子转移,影响蛋白质功能.
科学领域:
- 生物物理
- 生物化学
- 蛋白质科学
背景情况:
- 在金属蛋白中长距离的电子道对于生物功能至关重要.
- 进化过程优化了蛋白质结构,通过调整电子合,潜力和重组能量来实现高效的电子转移.
- 蛋白质折叠景观表现出最小的挫折,允许功能调整,但在活跃位置附近的残余挫折可以促进构造动态.
研究的目的:
- 调查蛋白质"丧"及其在调节青素中电子转移效率中的作用.
- 了解铜活性位点周围的局部和远程相互作用如何影响电子道速率.
- 为了比较野生型青素的挫折模式与表现出改变电子转移动性的活性位变体的挫折模式.
主要方法:
- 蛋白质结构和动态的计算分析.
- 电子合和重组能量的评估.
- 挫折模式与实验观察到的电子转移率的相关性.
主要成果:
- 野生类型的氨酸表现出一种特殊的微小阻断相互作用模式,使得电子流动快速.
- 活点青素变体在铜点附近显示增加的丧,导致电子转移缓慢.
- 变体中的重组能量和电子转移率与丧模式的过度氧化状态依赖性有关.
结论:
- 蛋白质丧的程度和分布,特别是在活性部位附近,是氨酸中电子转移效率的关键决定因素.
- 最少的挫折相互作用便于快速的电子道化,而增加的挫折则阻碍了它.
- 了解挫折模式可以了解蛋白质进化和人工电子转移系统的设计.
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