在活细胞中单个mRNA上的突发翻译
Nathan M Livingston1, Jiwoong Kwon1, Oliver Valera2
1Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Center for Cell Dynamics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
Molecular cell
|June 17, 2023
概括
基因表达"噪音"来自翻译爆发,而不仅仅是转录. 新的成像揭示了翻译动态,显示了活跃和不活跃状态之间的循环,受mRNA结构和eIF4F等因素的影响.
科学领域:
- 分子生物学分子生物学
- 系统生物学 系统生物学
- 遗传学 是一个遗传学.
背景情况:
- 随机性或噪声是基因调节的一个关键因素.
- 爆发转录是基因表达噪声的研究良好的来源.
- 由于技术的局限性,随机性在翻译中的作用在很大程度上仍未被探索.
研究的目的:
- 为了研究mRNA翻译中随机性的动态.
- 开发和应用新的成像技术来追踪活细胞中单个mRNA的翻译.
- 了解控制转化爆破的监管机制.
主要方法:
- 开发先进的活细胞成像技术,以追踪单个mRNA分子及其长时间的翻译.
- 应用遗传和药理学扰动来调节翻译动力学.
- 单分子成像与随机建模的整合,用于定量运动分析.
主要成果:
- 翻译,类似于转录,表现出爆发行为,在不活跃和活跃状态之间循环.
- 与转录不同,转化爆发幅度是由复杂的5eal-untranslated区域结构调节的.
- 转换式爆破频率可以通过上限-近端序列和跨作用因子 (例如,eIF4F) 控制.
结论:
- 翻译爆发是对基因表达随机性的重要贡献者.
- 在调节翻译动态方面,mRNA序列和结构起着至关重要的作用.
- 这项研究为转化爆发的动力参数提供了定量见解,为基因调节研究开辟了新的途径.
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