m3C32的tRNA修饰控制了血清编码子偏差的mRNA转化,细胞循环和DNA损伤反应
Jia Cui1,2, Erdem Sendinc1,2, Qi Liu1,2,3,4
1Stem Cell Program, Division of Hematology/Oncology, Boston Children's Hospital, Boston, MA, 02115, USA.
Nature communications
|July 9, 2024
概括
这项研究揭示了转移RNA (tRNA) 上的N3-甲基丁 (m3C) 如何影响基因表达. METTL2A/2B/6酶对m3C修饰至关重要,影响细胞周期和DNA修复基因翻译.
科学领域:
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 在RNA生物学,RNA生物学.
背景情况:
- 表体转录组,包括RNA修饰,调节基因表达.
- N3-甲基丁 (m3C) 是一种RNA修饰,存在于某些转移RNA (tRNA) 的抗环中,但其功能仍然基本未知.
研究的目的:
- 在依赖METTL2A/2B和METTL6酶的人类细胞中全面绘制m3C配置文件.
- 阐明m3C32修饰在tRNA中的功能作用,特别是与基因翻译和细胞表型有关.
主要方法:
- 使用HAC-Seq (通过测序对RNA修饰的高通量分析) 来分析m3C修饰的情况.
- Ribo-Seq用于分析细胞中mRNA翻译动态,其中m3C水平发生变化.
- 进行了记者测定,以验证发现.
主要成果:
- METTL2A/2B主要修改tRNA-氨酸和tRNA-氨酸,而METTL6修改tRNA-氨酸.
- 联合删除METTL2A/2B/6导致tRNA-Ser-GCT.上m3C32的减少.
- 缺乏METTL2A/2B/6的细胞显示细胞周期和DNA修复基因的翻译改变,富含需要tRNA-Ser-GCT的AGU编码子.
结论:
- METTL2A/2B/6酶在人体细胞中建立了不同的m3C甲基组.
- 修改m3C32tRNA对于参与细胞循环和DNA修复的血清编码子偏差mRNA的翻译至关重要.
- 这种修饰影响细胞表型,包括细胞循环进展,增殖和对西斯的敏感性.
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