由内在无序区域进行的分子内部和分子间调节控制PUF蛋白与RNA结合
Chen Qiu1, Zihan Zhang2, Robert N Wine1
1Epigenetics and Stem Cell Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA.
Nature communications
|November 12, 2023
概括
雌-3结合因子-2 (FBF-2) 蛋白质乱的尾部抑制其RNA结合. 伴侣蛋白质LST-1结合释放了这种抑制,增强了FBF-2的RNA亲和力,以调节生殖干细胞.
科学领域:
- 分子生物学分子生物学
- 发育生物学 发展生物学
- 在RNA生物学,RNA生物学.
背景情况:
- PUF蛋白具有RNA结合域,并与调节性合作伙伴蛋白相互作用.
- 凯诺拉布狄氏菌的PUF蛋白FBF-2与内在无序的LST-1合作,控制生殖系干细胞中的目标mRNA.
研究的目的:
- 阐明FBF-2RNA结合亲缘关系的调节机制,通过其C端内在无序区域 (IDR).
- 研究FBF-2,LST-1和生殖系干细胞自我更新中的RNA结合之间的相互作用.
主要方法:
- 生物化学和生物物理分析被用来研究蛋白质-RNA相互作用.
- 研究了FBF-2 C端IDR的自身抑制作用.
- 研究了LST-1与FBF-2RNA结合域的竞争性结合.
主要成果:
- FBF-2 C端IDR通过增加RNA脱离率来自抑制RNA结合.
- C终端区域与RNA结合域上的LST-1结合于相同的部位.
- 结合LST-1会将C终端区域移位,缓解自身抑制并提高RNA结合亲和力.
结论:
- 内在无序区域 (IDR) 在调节蛋白质功能方面发挥着至关重要的作用.
- 描述了FBF-2RNA结合的新型自身抑制机制,涉及其C端IDR.
- 这种机制解释了FBF-2和LST-1在维持生殖系干细胞自我更新方面的功能相互依赖.
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