死亡盒RNA螺旋酶Ded1与翻译核糖体有关
Hilal Yeter-Alat1,2, Naïma Belgareh-Touzé3, Emmeline Huvelle1,2
1Expression Génétique Microbienne, Université de Paris Cité & CNRS, IBPC, 13 Rue Pierre et Marie Curie, 75005 Paris, France.
Genes
|August 26, 2023
概括
酵母Ded1蛋白与参与翻译和细胞应激的信使RNA (mRNA) 结合. 这种结合由ATP调节,并随着营养的可用性而变化,这表明它在控制蛋白质合成中的作用.
科学领域:
- 分子生物学分子生物学
- 在RNA生物学,RNA生物学.
- 生物化学 生物化学
背景情况:
- 死亡盒RNA基酶是关键的ATP依赖蛋白质,参与RNA代谢.
- 酵母DEAD盒蛋白Ded1和哺乳动物DDX3的正系蛋白Ded1在翻译启动过程中在核糖体扫描中发挥作用.
- 了解Ded1的RNA结合是解读其在基因表达中的调节功能的关键.
研究的目的:
- 为了研究酵母Ded1蛋白的体内RNA结合场景.
- 用一种新的技术来描述Ded1交联的条件和mRNA目标.
- 探索Ded1-RNA相互作用如何在不同的细胞条件下发生变化,例如葡萄糖耗尽.
主要方法:
- 使用了经过修改的可光激活的核糖核酸增强交叉链接和免疫沉 (PAR-CLIP) 技术,称为快速时间 PAR-CLIP (qtPAR-CLIP).
- 在生理条件下采用紫外线照射 (365nm) 在体内与4-氨酸结合的RNA交叉连接Ded1.
- 在正常和缺乏葡萄糖的条件下,分析了各种信使RNA (mRNA) 的交联模式.
主要成果:
- Ded1广泛与特定的mRNA交叉链接,特别是编码核糖体蛋白和转化因子的mRNA.
- 在葡萄糖耗尽的情况下,Ded1交联转移到参与新陈代谢和应激反应的mRNA.
- 在良性,生理条件下实现了Ded1-RNA交联的高效率.
结论:
- Ded1与特定的mRNA子集相互作用,其结合模式由细胞条件动态调节.
- 观察到的RNA结合特征支持Ded1在调节翻译延长中的作用,可能通过调节核糖体活性.
- qtPAR-CLIP是一种有效的方法,用于在生理条件下研究体内RNA-蛋白相互作用.
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