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4EHP和NELF-E调节Drosophila疾病模型中的生理ATF4诱导和蛋白质稳定
Kristoffer Walsh1, Hidetaka Katow1, Hannah Junn1
1Department of Cell Biology, NYU Grossman School of Medicine, New York, USA.
Nature communications
|December 23, 2025
概括
一个涉及4EHP和NELF-E的新发现的监管网络在细胞应激期间影响ATF4转换. 这一发现揭示了蛋白质静止和疾病机制.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 细胞利用压力激活的激酶来调节ATF4转化在蛋白质静止和代谢压力期间.
- ATF4 mRNA的5'领导序列对于压力诱导的翻译至关重要,但额外的调节者仍然在很大程度上未知.
研究的目的:
- 为了识别和描述ATF4诱导的新型调节剂.
- 阐明ATF4监管网络对蛋白质静止和疾病的影响.
主要方法:
- 通过编辑结合RNA的目标 (TRIBE) 屏幕以识别4EHP交互器.
- 定量蛋白质组学用于分析蛋白质复合体.
- 在Drosophila和疾病模型中进行CRISPR查,以评估基因功能.
主要成果:
- 在drosophila和疾病模型中,mRNA盖结合蛋白4EHP对于ATF4信号传递至关重要.
- NELF-E mRNA被确定为4EHP的一个关键相互作用因子.
- 击败4EHP或NELF-E减少了40S核糖体子单元和eIF3翻译启动因子,抑制ATF4及其向基因.
结论:
- 一个包含4EHP和NELF-E的新型ATF4监管网络被发现.
- 这个网络在调节ATF4表达和影响正常发育和疾病背景下的蛋白质静止中发挥着关键作用.
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