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使用生物仿真电子转移过程对和蛋白质中基残留物的选择性修饰

Samantha J Tower¹, Wesley J Hetcher¹, Tyler E Myers¹

¹University of Wyoming, Department of Chemistry, Laramie, Wyoming 82071, United States.

Journal of the American Chemical Society

|April 30, 2020

概括

这项研究引入了一种新型的光化学方法,使用UV-B光和盐精确修改蛋白质中的酸残留物. 这种选择性基改发生在水中,适用于各种应用.

科学领域:

生物化学
摄影化学
化学生物学

背景情况:

选择性修饰氨基酸残留对于蛋白质工程和化学生物学至关重要.
由于其独特的光化学性质,酸 (Trp) 残留物是重要的目标.
现有的Trp修饰方法往往缺乏选择性或需要严格的条件.

研究的目的:

在和蛋白质中开发一种新型的光化学过程.
探索这种新的Trp修改技术的机制和范围.
展示开发的蛋白质标记和功能化的方法的多功能性.

主要方法:

使用电子反应的N-carbamoylpyridinium盐和UV-B光进行光化学修饰.
通过初步的机械实验研究了反应机制,重点是光诱导电子转移 (PET).
应用该方法标记含有1至14kDa的和蛋白质.

主要成果:

实现了对基的高度选择性修饰.
证明了该反应对其他氧化还原活性氨基酸的耐受性.
在水的条件下,在广泛的度范围内通过谷氨增强的有效反应.
成功地将各种功能组,包括反应性手柄和净化标签,与托残留物结合起来.

结论:

开发的光化学工艺为和蛋白质中的变提供了一种选择性,高效和多用途的方法.
可以调整N-carbamoylpyridinium盐以挑战光结合反应和功能组结合.
这种方法在化学生物学,蛋白质组学和蛋白质工程中具有显著的应用潜力.

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