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全长度的直接RNA测序揭示了在细胞应激时依赖应激颗粒的RNA衰变

Showkat Ahmad Dar¹, Sulochan Malla¹, Vlastimil Martinek^1,2,3

¹Laboratory of Genetics and Genomics, National Institute on Aging, Intramural Research Program, National Institutes of Health, Baltimore, United States.

|December 19, 2024

概括

细胞应激会在5'端触发RNA衰变,影响基因表达,并与翻译相关. 这个过程依赖于XRN1和应力颗粒的形成,而不是典型的死化或切割.

科学领域:

分子生物学分子生物学
细胞生物学细胞生物学
基因组学就是基因组学.

背景情况:

细胞激活应激反应通路,改变基因表达以维持平衡.
RNA代谢在细胞应激反应中起着关键作用.
在压力期间RNA稳定性的全球变化尚未得到充分理解.

研究的目的:

在细胞应激期间调查RNA稳定性的全球变化.
阐明在压力条件下RNA衰变的机制.
了解RNA代谢在细胞应激反应中的作用.

主要方法:

使用纳米孔技术与5'端适配器绑定进行直接RNA测序.
在纳米孔数据中分析RNA长度变化的统计框架的开发.
研究RNA衰变对特定酶 (XRN1) 和细胞结构 (压力颗粒) 的依赖.

主要成果:

细胞应激诱导广泛的5'端RNA衰变,加上翻译和核糖体占用.
压力诱导的RNA衰变依赖于酶XRN1.1.
这种衰变途径独立于死乙烯和脱皮.
经历衰变的RNA被富含压力颗粒.
抑制压力颗粒形成可以挽救RNA长度.

结论:

RNA衰变是细胞应激反应的重要组成部分.
压力诱导的RNA衰变在机理上不同于正规的衰变途径.
压力颗粒的形成对于这种压力特定的RNA衰变过程至关重要.

关键词:

在RNA衰变过程中,RNA衰变.细胞生物学细胞生物学细胞系细胞系的细胞系.遗传学遗传学遗传学是一个基因组学就是基因组学.人类人类人类人类人类人类人类这里是鼠标鼠标鼠标鼠标鼠标鼠标.压力反应应对压力的反应.

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