一种新型的L-RNA吸收酶,用于调节pUG折叠RNA诱导的基因表达 in vivo
Shiau Wei Liew1, Dong Cao2, Riley J Petersen3
1Department of Chemistry and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon Tong, Hong Kong SAR, 999077, China.
Nucleic acids research
|March 8, 2025
概括
研究人员开发了一种新型L-RNA吸收体L-apt3.1,该吸收体向独特的poly(UG) (pUG) RNA G-四重复 (rG4) 折叠. 这种阿普坦酶在体内抑制了通过pUG折叠介导的跨代基因沉默.
科学领域:
- 分子生物学分子生物学
- RNA结构和功能 RNA结构和功能
- 基因规则 基因规则
背景情况:
- G四复合体 (G4) 是核酸中富含瓜的二次结构,具有多种生物作用.
- 在Caenorhabditis elegans中发现了一种新的非正规RNA G-四重复 (rG4),即多格 (pUG) 折叠.
- 在pUG折叠诱导RNA干扰 (RNAi) 和跨代基因沉默通过RNA依赖RNA聚合酶 (RdRP).
研究的目的:
- 开发一种能够与pUG折叠结合的新型L-RNA胺体.
- 描述阿普坦-pUG折叠相互作用的结构基础.
- 为了评估aptamer在控制pUG折叠介导基因沉默中的有效性.
主要方法:
- 设计和合成一种新型L-RNA吸收酶 (L-apt3.1).
- 对L-apt3.1的结构分析,包括用于识别关键识别动机的突变发生研究.
- 在体外结合测试以确认L-apt3.1与pUG折叠的相互作用.
- 在体内对C. elegans进行研究,以评估生物稳定性,毒性和基因沉默抑制.
主要成果:
- 开发了L-apt3.1,并发现它具有平行rG4结构图案,这对于pUG折叠识别至关重要.
- 在实验室中,L-apt3.1对pUG折叠表现出强烈的结合,标记了第一个具有这种能力的报道的aptamer.
- 胺体在细胞环境中表现出良好的生物稳定性,体内毒性可忽略不计,并且有效抑制了C. elegans中的pUG折叠介导基因沉默.
结论:
- 一种针对pUG折叠的新型L-RNA吸收体L-apt3.1已经成功开发出来.
- L-apt3.1代表了一种用于研究和操纵pUG折叠介导基因表达的新分子工具.
- 这种胺体显示出在活体中控制涉及pUG折叠的基因沉默途径的潜力.
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