核2'-O-甲基化通过其结合蛋白FUBP1调节RNA剪接
Boyang Gao1,2, Bochen Jiang2,3, Zhongyu Zou2,3
1Department of Molecular Genetics and Cell Biology, University of Chicago, Chicago, IL 60637, USA.
Science advances
|October 17, 2025
概括
这项研究确定FUBP1是一种能结合2'-O-甲基化 (Nm) RNA修饰的蛋白质. 这种结合对于调节RNA剪接至关重要,为Nm修饰揭示了新的核功能.
科学领域:
- 分子生物学分子生物学
- 在RNA生物学,RNA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.
背景情况:
- 2 -O-甲基化 (Nm) 是哺乳动物中普遍存在的RNA修饰,但其蛋白质识别和核功能在很大程度上仍未被探索.
- 了解蛋白质如何与Nm修饰RNA相互作用,对于破译其调节作用至关重要.
研究的目的:
- 为了识别与2 -O-甲基化 (Nm) 修改RNA结合的蛋白质.
- 研究Nm结合蛋白在核过程中的功能意义,特别是RNA剪接.
主要方法:
- 与质谱相结合的RNA亲和力净化用于识别Nm结合蛋白.
- 电泳运动转移试验 (EMSA) 用于验证蛋白质-RNA相互作用.
- 在染色质关联RNA (caRNA) 中分析Nm位点,并分析FUBP1占用率.
主要成果:
- 确定了几种Nm结合蛋白候选物,包括拼接因子FUBP1,它显示出与Nm修饰RNA的优先结合.
- 在caRNA的内基区域中,Nm修饰被丰富,并与FUBP1结合部位重叠.
- 耗尽Nm导致了外因子跳转并减少了FUBP1的占用,而FUBP1的耗尽导致了Nm修饰基因中的外因子跳转.
结论:
- FUBP1是一种新型Nm结合蛋白,在RNA拼接调节中起着重要作用.
- RNA 2 -O-甲基化 (Nm) 修饰具有以前未知的核功能,可以通过像FUBP1.1.这样的蛋白质调节剪接调节.
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