在活细胞中使用小分子光敏感剂和化学探针继电器标签的功能性histidines的全球概况
Yansheng Zhai1, Xinyu Zhang1,2, Zijing Chen3
1Institute of Systems and Physical Biology, Shenzhen Bay Laboratory, Shenzhen, China.
Nature chemistry
|June 4, 2024
概括
这项研究引入了一种新的化学探针方法,用于在蛋白质中高度选择性地标记histidine. 这一进步使得蛋白质组覆盖范围更广泛,并揭示了对丁位点的新功能洞察.
科学领域:
- 化学生物学是化学生物学.
- 蛋白质组学是指蛋白质组学.
- 生物化学 生物化学
背景情况:
- 化学蛋白质组学旨在开发核性氨基酸残留的探针.
- 伊斯蒂丁对于酶催化,金属结合和蛋白质相互作用至关重要,但由于其低核性和氨酸和氨酸的干扰,其修饰具有挑战性.
- 现有方法的选择性较差,对丁修饰的蛋白质覆盖范围有限.
研究的目的:
- 开发一种高度选择性的化学探测方法,用于希斯提丁标记.
- 为了在活细胞中实现全面的西斯蒂丁分析.
- 发现新型的功能性歇斯蒂丁位点,并了解它们在蛋白质活性和相互作用中的作用.
主要方法:
- 一个单片氧气和化学探针继电器标记策略被开发出来.
- 对光敏剂和化学探针库的选优化了伊斯蒂丁标签.
- 使用NMR光谱学和X射线晶体学来阐明反应机制和产品结构.
主要成果:
- 开发的方法实现了对西斯蒂丁修饰的高选择性.
- 在活细胞中进行的氨酸分析确定了大约7200个独特的位点.
- 该方法成功地确定了对酶活性和金属蛋白中的金属结合至关重要的未注释的histidine位点.
- 由于蛋白质-蛋白质相互作用影响亚细胞局部化的原因,揭示了histidine可访问性的变化.
结论:
- 单片氧和化学探针中继方法显著提高了对西斯蒂丁标签的选择性和覆盖范围.
- 这种方法有助于发现参与酶活性,金属结合和蛋白质与蛋白质相互作用的功能性歇斯蒂丁.
- 该方法提供了对histidine在蛋白质功能和调节中的作用的新见解,包括亚细胞局部化.
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