光亲缘性使得在原生细胞中能够在全转录组范围内识别小分子-RNA结合事件的拼接调节
Raven Shah1, Wanlin Yan1, Joyce Rigal1
1Novartis Biomedical Research, Discovery Sciences Cambridge MA USA andrea.byrnes@novartis.com jason.thomas@novartis.com.
RSC chemical biology
|April 14, 2025
概括
研究人员确定了端粒酶RNA组件 (TERC) 作为使用光亲和标签的拼接调节小分子的直接目标. 这一发现促进了对小分子与RNA标相互作用的理解.
科学领域:
- 分子生物学分子生物学
- 在RNA疗法方面.
- 化学生物学 化学生物学
背景情况:
- 剪接调节小分子的设计是为了改变U1 snRNP与前mRNA的接触.
- 转录基因分析可以检测受化合物影响的RNA,但难以区分直接和间接的影响.
研究的目的:
- 为了确定拼接调节小分子的直接RNA目标.
- 为了研究这些分子在已识别的RNA标上的结合部位.
主要方法:
- 基于光亲和标记 (PAL) 的Chem-CLIP被用来捕捉直接的RNA化合物相互作用.
- 细胞 ΔSHAPE-MaP 用于直角验证和精确的结合位点确定.
- 在Chem-CLIP数据中对竞争性RNA进行了分析,以改进命中识别.
主要成果:
- 端粒酶RNA成分 (TERC) 被确定为拼接调节小分子的新型直接标.
- TERC的保存的CR4/5域被验证为可能的小分子结合部位.
- 考虑竞争的RNA提高了直接RNA目标的识别,即使是那些富含度低的RNA.
结论:
- TERC是以前未知的临床相关拼接调节小分子的直接目标.
- TERC的CR4/5域是这些化合物的关键相互作用地点.
- 基于PAL的Chem-CLIP,与竞争RNA的分析,是识别直接RNA-小分子相互作用的强大方法.
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