跨越mRNA生命周期的RNA结合蛋白相互作用体的大规模地图
Lena A Street1, Katherine L Rothamel2, Kristopher W Brannan3
1Department of Biological Sciences, Columbia University, New York, NY, USA.
Molecular cell
|September 20, 2024
概括
这项研究绘制了RNA结合蛋白 (RBPs) 在mRNA生命周期中的蛋白质-蛋白质相互作用 (PPI). 它揭示了许多RNA调节的相互作用,将蛋白质与特定的mRNA阶段和功能联系起来.
科学领域:
- 分子生物学分子生物学
- 蛋白质组学是指蛋白质组学.
- 在RNA生物学,RNA生物学.
背景情况:
- 使者RNAs (mRNAs) 在它们的生命周期中与RNA结合蛋白 (RBPs) 相互作用.
- 之前的研究集中在RBP-RNA相互作用上,在mRNA处理阶段对RBP-蛋白相互作用 (PPI) 的探索较少.
研究的目的:
- 在人类mRNA生命周期中构建一个RNA意识的,以RBP为中心的PPI地图.
- 识别新型PPI并了解它们的RNA调节.
- 将蛋白质,包括那些功能不明的蛋白质,与特定的mRNA生命周期阶段联系起来.
主要方法:
- 使用免疫净化质谱 (IP-MS) 测试了大约100种内源性RBP,有或没有RNase治疗.
- 增强的IP-MS数据与大小排除色谱-质谱 (SEC-MS).
- 分析了RNA调节的已识别的相互作用.
主要成果:
- 在1,125种蛋白质中确定了8,742种已知和20,802种新型的PPI.
- 确定73%的已识别的PPI是RNA调节的.
- 将许多蛋白质与特定的mRNA生命周期阶段联系起来,其中近一半与多个阶段相关.
结论:
- 生成的互动组为研究mRNA处理和RBP功能提供了宝贵的资源.
- 通过在拼接和出口中表征原始同类 (ERH) 功能的增强器来证明资源的实用性.
- 在压力过程中展示了SNRNP200的差异性细胞质RNA结合,将其与压力颗粒蛋白联系起来.
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