脱氨酸和四醇之间的光启动的1,3-双极循环添加:适用于晚期和蛋白质修饰
Mengqian Zhang1, Peiyang He1, Yanmei Li1,2,3
1Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Department of Chemistry, Tsinghua University Beijing 100084 P. R. China liym@mail.tsinghua.edu.cn.
Chemical science
|September 15, 2023
概括
在温和的条件下,一种新的光启动反应快速有效地修改了和蛋白质中的脱氨酸 (Dha) 残留物. 这种无催化剂的方法提供了精确的位点特异性和光标签,使得像活细胞成像这样的应用成为可能.
科学领域:
- 生物化学 生物化学
- 化学生物学 化学生物学
- 有机化学 有机化学
背景情况:
- 脱氨酸 (Dha) 是一种非正规的氨基酸,具有独特的电友性,对蛋白质的翻译后修饰 (PTM) 和标记有价值.
- 现有的Dha修饰策略在平衡反应速度,温和条件和无催化剂方法方面面临挑战.
- 对Dha修饰的可光控制和无催化剂的方法开发不足,这限制了它们的应用范围.
研究的目的:
- 开发一种快速,高效和温和的脱氨 (Dha) 修饰策略.
- 建立一种无催化剂,可光控制的方法,用于含有Dha的和蛋白质功能化.
- 探索这种新的方法在生物系统中的应用,包括活细胞成像.
主要方法:
- 在Dha和2,5-diaryl tetrazoles之间发生光发起的1,3-双极循环添加反应.
- 使用低功率紫外线灯照射来启动反应.
- 使用thiostrepton,一种具有多个Dha残留物的天然抗微生物,证明了化学选择性和局部特异性.
主要成果:
- 在温和的,没有催化剂的条件下,反应迅速 (几分钟内) 进行.
- 对Dha残留物获得了优异的化学选择性,产生光型酸改性/蛋白质.
- 在 thiostrepton 上表现出完全的位点特异性,修改 Dha16 最快,并显示出高产量.
- 由于反应速度和效率,最大限度地减少了紫外线对生物系统的破坏.
结论:
- 开发了一种新的,快速和高效的Dha修饰的光启动循环添加反应.
- 这种无催化剂,可光控制的方法提供了对和蛋白质的特定位置的精确标记.
- 该方法的速度,温和性和原性质使其在活细胞成像和蛋白质功能化中的应用成为可能.
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