协调翻译启动确定了染色体基因对细胞适应性产生影响的编程核糖体框架转移效率
Sih-Yun Tai1, Masayuki Hashimoto2,3, Yi-Fang Zhuang1
1Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
The FEBS journal
|February 22, 2026
概括
翻译启动率对细菌和哺乳动物细胞的编程核糖体框架转移 (-1PRF) 效率产生逆影响. 较高的启动率降低了框架转移的刺激元素改革,减少了-1PRF.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 微生物学 微生物学
背景情况:
- 编程核糖体框架转移 (-1PRF) 是一种保护的机制,对于eubacteria和病毒的基因表达至关重要.
- 它通常在翻译延长过程中受到调节,涉及移刺激元件 (FSEs) 阻断核糖体.
- 一个假设表明,翻译启动和FSE改革之间的协调影响-1PRF.
研究的目的:
- 调查翻译启动率在调节-1PRF效率中的作用.
- 确定翻译启动是否可以作为1PRF的额外监管机制.
- 探索翻译启动和延伸在控制蛋白质合成中的相互作用.
主要方法:
- 开发了一个可调节的翻译启动率的系统,使用MS2菌体外套蛋白质发针.
- 在欧细菌和哺乳动物细胞的不同启动率中评估了-1PRF的效率.
- 在大肠杆菌 (E. coli) 中进行了机理学研究,并分析了特定的E. coli -1PRF事件 (copA/copA(Z)).
主要成果:
- 在翻译启动率和-1PRF效率之间观察到一个保守的负相关性.
- 增加的启动率导致FSE改造频率降低,从而降低了1PRF的效率.
- 在大肠杆菌中,较高的翻译启动率降低了-1PRF效率,增加了铜应激敏感性.
结论:
- 翻译启动率是1PRF的额外监管机制.
- 这种调节有助于协调蛋白质合成,以获得最佳的细胞健康.
- 这些发现为进一步研究1PRF中翻译启动和延伸之间的相互作用提供了基础.
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