一个统一的YTHDF蛋白在调节A-修改的mRNA中的功能模型
Sara Zaccara1, Samie R Jaffrey1
1Department of Pharmacology, Weill Cornell Medicine, Cornell University, New York, NY 10065, USA.
Cell
|June 4, 2020
概括
N6-甲基氨酸 (m6A) 的RNA修饰调节了细胞分化. 之前认为与不同mRNA结合的YTHDF蛋白实际上与相同的mRNA结合,以冗余的方式调解mRNA降解和分化.
科学领域:
- 分子生物学
- 表观遗传学
- 核糖核酸生物学
背景情况:
- N6-甲基氨酸 (m6A) 是最常见的mRNA修饰.
- m6A 调节细胞生理和分化.
- 细胞质YTHDF m6A结合蛋白 (DF1,DF2,DF3) 是关键的介导体.
研究的目的:
- 研究YTHDF蛋白与m6A修饰的mRNA的结合相互作用.
- 阐明YTHDF蛋白在mRNA调节和细胞分化中的功能作用.
- 挑战并完善当前的m6A功能模式.
主要方法:
- 对YTHDF蛋白与m6A修饰的mRNA结合的分析.
- 在HeLa细胞中进行功能性测试,以评估mRNA的翻译和降解.
- 用于评估它们的联合效果的 DF 对象的耗尽研究.
主要成果:
- 与之前的模型相反,YTHDF蛋白与相同的m6A修饰的mRNA结合.
- 在HeLa细胞中,YTHDF蛋白不会诱导翻译.
- DF对应物以冗余的作用调解mRNA降解和细胞分化,只有在同时耗尽时才显现出效果.
- 一个统一的模型,其中YTHDF蛋白质对m6AmRNA集体起作用.
结论:
- YTHDF蛋白质的功能是冗余的,以调节mRNA稳定性和细胞分化.
- 需要同时耗尽所有三种YTHDF对应物来观察它们的全部影响.
- 这项研究提出了由YTHDF蛋白调节m6ARNA的统一模型.
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