补充的Alu序列调解了增强剂-促进剂的选择性
Liang Liang1, Changchang Cao1, Lei Ji1
1Key Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.
Nature
|July 12, 2023
概括
通过互补的RNA相互作用调解增强剂-促进剂循环. 这一发现揭示了基因调节的机制, 并将非编码变体与分子功能联系起来, 包括癌症风险.
科学领域:
- 基因组学
- 分子生物学
- 表观遗传学
背景情况:
- 增强剂通过与促进体相互作用来调节基因表达.
- 增强剂找到它们的相关促进剂的机制在很大程度上是未知的.
研究的目的:
- 研究RNA相互作用在增强剂-促进剂连接中的作用.
- 绘制增强剂-促进剂RNA相互作用并识别相关的基因组元素.
- 将非编码的遗传变体与它们的分子功能联系起来.
主要方法:
- 应用RICS技术来生成增强剂-促进剂RNA相互作用图.
- 分析Alu元素与增强剂-促进剂RNA相互作用位点的重叠.
- 功能性实验涉及Alu元素的淘汰和绑定.
- 将非编码风险变体映射到增强剂-促进剂相互作用图中.
主要成果:
- 37. 9% 的增强剂-促进剂RNA相互作用部位与 Alu 序列重叠.
- 阿卢和非阿卢RNA序列显示互补性,表明双重形成.
- 元素操纵 (淘汰赛,插入,绑定) 影响了增强剂-促进剂循环.
- 建立了一个框架,将非编码变体与基因功能联系起来,识别了影响蛋白质编码基因的Alu元素中的数千种变体.
- 在PTK2增强剂中插入多态Alu与瘤发生有关.
结论:
- 通过RNA双重组的形成来调解增强剂-促进剂配对的特异性,Alu元素起着至关重要的作用.
- 这项研究提供了一种方法来解释非编码风险变体的分子功能.
- 这些发现为基因调节及其对疾病的影响提供了新的理解.
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