DHX36结合诱导RNA结构体重塑,并通过m6调节RNA的丰富性阅读器YTHDF1
Yuwei Zhang1, Jieyu Zhao2, Xiaona Chen3,4
1Department of Chemical Pathology, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong, SAR, China.
Nature communications
|November 14, 2024
概括
DEAH盒酶36 (DHX36) 蛋白重塑RNA结构,特别是在3'未翻译区域 (3'UTR). 这种结构变化增强了N6-甲基氨酸 (m6A) 修饰和YTHDF1结合,最终降低了mRNA的丰度.
科学领域:
- 分子生物学分子生物学
- 基因规则 基因规则
- 在RNA生物学,RNA生物学.
背景情况:
- RNA二次结构在基因调节中起着至关重要的作用.
- 已知DEAH-box化酶36 (DHX36) 与RNA G-四重复 (rG4) 结构相互作用并解.
- DHX36对转录组范围内的RNA结构和随后的RNA命运的全部影响尚不清楚.
研究的目的:
- 为了研究由DHX36枯竭引起的RNA结构 (结构体) 的变化.
- 要了解DHX36结合如何影响整个转录的RNA结构,重点关注3e'未翻译区域 (3e'UTR).
- 阐明DHX36影响转录后mRNA丰度的机制.
主要方法:
- 在DHX36耗尽后对RNA结构体变化的分析.
- 在3e'UTR和mRNA丰度中的结构性可访问性之间的相关性分析.
- 对DHX36结合部位的丰富进行N6-甲基氨酸 (m6A) 修饰和YTHDF1结合的研究.
- 实验验证DHX36在促进YTHDF1结合和RNA降解中的作用.
主要成果:
- DHX36结合诱导显著的RNA结构重塑,超越局部部位扩展到整个mRNA转录,最显著的是3e'UTRs.
- 由于DHX36结合相关物与减少的转录后mRNA水平,增加了3e'UTR中的结构可访问性.
- DHX36结合部位显示为m6A修饰和YTHDF1结合的丰富.
- 通过DHX36介导的结构变化促进YTHDF1与m6A位点结合,促进RNA降解.
结论:
- DHX36结合显著重塑mRNA转录中的RNA结构,特别是在3e'UTR中.
- DHX36通过调节RNA结构来影响mRNA的丰富性,这反过来影响m6A依赖的YTHDF1结合和随后的RNA降解.
- 这些发现揭示了一种新的调节途径,涉及DHX36通过RNA结构调节进行转录后基因调节.
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