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Updated: Jun 18, 2025

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调整设计者翻译器官的功能与正角tRNA合成酶/tRNA对

Mikhail E Sushkin¹, Marius Jung², Edward A Lemke³

¹Biocenter, Johannes Gutenberg University Mainz, Hanns-Dieter-Hüsch-Weg 17, 55128 Mainz, Germany; International PhD Programme of the Institute of Molecular Biology (IMB) gGmbH, Hanns-Dieter-Hüsch-Weg 17, 55128 Mainz, Germany.

Journal of molecular biology

|August 1, 2024

概括

使用直角翻译器官 (OTOs) 扩展遗传密码可以实现特定站点的蛋白质工程. 一个新的仿真RS/tRNA对克服了局限性,允许ncAA在OTO中被纳入以增强蛋白质功能.

科学领域:

生物化学生物化学
分子生物学分子生物学
合成生物学合成生物学

背景情况:

遗传密码扩展 (GCE) 能够将非正规氨基酸 (ncAAs) 具体地纳入蛋白质中.
正向翻译器官 (OTOs) 为哺乳动物细胞中背景ncAA整合提供了一个解决方案.
目前的OTO应用仅限于单个tRNA合成酶/tRNA (RS/tRNA) 对的独家使用.

研究的目的:

为了探索额外的正交RS/tRNA对与GCE的OTO的兼容性.
开发一种新的RS/tRNA对,以便在OTO中有效和选择性地纳入ncAA.
确定设计器官中的酶功能的空间工程设计约束.

主要方法:

在OTO中测试四个已确定的正交RS/tRNA对的mRNA选择性GCE.
开发和实施一种新的仿真基inylalanyl-RS/tRNA对.
研究使用OTOs进行体内蛋白质工程的设计约束.

主要成果:

四种常用的RS/tRNA对未能在OTO中实现mRNA选择性GCE.
一种新型的仿真基基-RS/tRNA对成功地使OTO中特定于位点和蛋白质选择性ncAA的结合成为可能.
确定了设计器官内酶功能的空间工程中未计入的设计约束.

结论:

新的仿真RS/tRNA对的开发扩大了基于OTO的GCE的工具包.
这项研究提供了关于克服空间工程在细胞内应用的局限性的见解.
这些发现为使用设计器官的先进的体内蛋白质工程策略铺平了道路.

关键词:

遗传密码扩张扩张不属于正规的氨基酸.在直角翻译器官的器官.阶段分离的阶段分离.蛋白质工程工程蛋白质工程

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