一种基于APEX2的亚细胞选择性近距离标签,用于识别线粒体G-四重体DNA结合蛋白
Xu Wang1,2, Geng Qin1,2, Jie Yang1,2
1Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022, P. R. China.
Nucleic acids research
|December 24, 2024
概括
研究人员开发了一种新方法来识别特定细胞位置与线粒体DNAG-四复合体 (G4s) 相互作用的蛋白质. 这种方法揭示了DHX30是展开G4s的关键蛋白质,影响瘤细胞糖解.
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:
- G四重复体 (G4s) 是非正规的DNA结构,对细胞过程至关重要.
- 了解G4蛋白相互作用对于G4生物学至关重要.
- 现有的方法缺乏细胞下空间特异性来识别G4结合蛋白 (G4BPs).
研究的目的:
- 为研究活细胞中的线粒体DNA (mtDNA) G4相互作用体开发一个亚细胞选择性近距离标记策略.
- 为了识别在特定亚细胞区内局部化的新型G4BPs.
主要方法:
- 使用基于APEX2的近距离标签策略,具有高时空分辨率.
- 采用基因编码系统在活细胞内进行特定的标记.
- 研究了已识别的G4BPs的生物功能,专注于DHX30.
主要成果:
- 通过使用新策略,成功识别了几种mtDNA G4BP.
- 发现DHX30是一种以前未被识别的mtDNA G4BP,它可以解决G4s.
- 证明DHX30展开mtDNAG4s,降低瘤细胞糖解,这种效应被RHPS4.4逆转.
结论:
- 开发的基于APEX2的策略能够识别具有高特异性的细胞下局部G4BPs.
- 提供了一种新的方法来绘制特定亚细胞区的核酸结构与蛋白质相互作用的地图.
- 突出了DHX30在调节mtDNA G4s和影响细胞代谢中的作用.
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