RNA-RNA相互作用使非编码RNA能够针对新生的前mRNA和染色质位点进行特定的向
Jesse M Engreitz1, Klara Sirokman2, Patrick McDonel2
1Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA; Division of Health Sciences and Technology, MIT, Cambridge, MA 02139, USA.
Cell
|September 27, 2014
概括
研究人员使用RAP-RNA.RNA绘制了RNA-RNA相互作用的地图. 这揭示了U1小核RNA和Malat1非编码RNA如何通过不同的机制准新生的转录,影响基因定位.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 生物化学 生物化学
背景情况:
- 非编码RNAs (ncRNAs) 通过分子间RNA-RNA相互作用来执行各种功能.
- 了解这些相互作用对于阐明生物过程中的ncRNA机制至关重要.
- U1小核RNA和Malat1是参与RNA处理的ncRNA,它们的相互作用机制尚不完全理解.
研究的目的:
- 开发和应用一种系统地绘制RNA-RNA相互作用的方法.
- 研究U1和Malat1与新生转录的相互作用机制.
- 确定这些相互作用如何影响ncRNAs的基因组定位.
主要方法:
- 开发RNA反意义净化以映射RNA-RNA相互作用 (RAP-RNA).
- 应用RAP-RNA来研究U1小核RNA和马拉特1.
- 使用差异交叉链接来确认直接和间接的RNA相互作用.
主要成果:
- U1小核RNA直接混合到5'拼接位和内基基因.
- 马拉特1通过蛋白质中间体间接与前mRNA相互作用.
- 与新生前mRNAs的相互作用导致在活性基因的染色质附近的ncRNA局部化.
结论:
- ncRNAs利用RNA-RNA相互作用来准特定的mRNA前和基因组部位.
- 拉普-RNA方法是敏感的,广泛适用于研究ncRNA相互作用,包括低丰度RNAs.
- U1 和 Malat1 的明确的准机制突出显示了在RNA处理中 ncRNA 功能的不同策略.
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