通过使用内源性β-氨基酸二烯的四素结合方法对特定地点的生物对等蛋白质进行标记
Daniel Richter1, Edgars Lakis1, Jörn Piel2
1Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zürich, Zürich, Switzerland.
Nature chemistry
|July 3, 2023
概括
这项研究介绍了TyrEx循环添加,这是一种用于细菌中自主生成二烯基基的新方法. 这种生物对等化学策略使得蛋白质标记和治疗应用的高效四素结合成为可能.
科学领域:
- 生物化学 生物化学
- 化学生物学 化学生物学
- 分子生物学分子生物学
背景情况:
- 四素结合是一种对修改生物分子至关重要的生物对等反应.
- 目前用于将二烯醇纳入生物分子的方法有限,需要外部试剂.
- 酶介导的结合或非自然的氨基酸结合是常见的,但有缺点.
研究的目的:
- 开发一种方法,在细菌中自主生成二氧化物,用于四素结合.
- 为了使蛋白质能够在体内进行高效且特定于特定地点的生物对等标记.
- 克服现有方法在生物分子中加入活性组的局限性.
主要方法:
- 引入了一种名为TyrEx (提拉胺切除) 循环添加的新型四素结合策略.
- 使用了一种独特的aminopyruvate单元,通过短标签的翻译后蛋白质拼接引入.
- 在细菌中证明了自主二诺菲尔生成和随后的四氨酸结合.
主要成果:
- 在0.625M-1s-1的速率常数下实现了快速的四氨酸合.
- 成功地应用了用放射性标记化剂标记Her2结合性Affibody的策略.
- 用光标记物证明了细胞分裂蛋白FtsZ的细胞内标记.
结论:
- TyrEx循环添加策略允许在细菌中自主生成二烯基和生物对等标签.
- 该方法为细胞内蛋白质研究提供了一个多功能平台,并为蛋白质疗法提供稳定的结合.
- 预期的应用包括体内蛋白质标签,蛋白质疗法开发和其他生物技术用途.
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