DAF-16 FOXO的近距离标签突出显示了老化调节蛋白
Murat Artan1,2, Hanna Schoen3, Mario de Bono4
1Institute of Science and Technology Austria (ISTA), Am Campus 1, Klosterneuburg, Austria. martan@uni-koeln.de.
Nature communications
|December 11, 2025
概括
胰岛素信号调节FOXO转录因子DAF-16,通过与PAR-1激酶相互作用. 这种相互作用影响衰老和寿命,为研究FOXO功能揭示了新的途径.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 衰老研究研究 衰老研究
背景情况:
- 胰岛素/胰岛素类生长因子 (IGF) 信号通路对于调节细胞过程至关重要.
- 包括C. elegans中的DAF-16在内的FOXO转录因子是这些信号通路的关键媒介.
- 了解FOXO蛋白调节的分子机制对于了解发育,平衡和衰老至关重要.
研究的目的:
- 使用近距离标记识别识别与C. elegansFOXO转录因子DAF-16相互作用的蛋白质.
- 阐明这些相互作用在胰岛素信号和寿命调节的背景下所起的作用.
- 发现FOXO功能的新型调节剂及其对衰老的影响.
主要方法:
- 使用近距离标记技术来识别C. elegans中的DAF-16相互作用蛋白.
- 生物化学测试用于确认相互作用和酸化事件.
- 基因操纵 (例如,淘汰,突变) 用于评估已识别的相互作用对寿命的功能影响.
主要成果:
- 在活性胰岛素信号条件下,DAF-16与PAR-1/MARK激酶形成复合体.
- PAR-1 抑制DAF-16 的积累,并促进其在S249的酸化,这是DAF-2 胰岛素信号调节的部位.
- 影响DAF-16酸化或PAR-1活性的突变显著影响寿命,而PAR-1抑制或S249A突变延长寿命.
- 在低胰岛素信号的情况下,DAF-16与转录因子,染色体调节剂和DNA修复蛋白相互作用,包括ZFH-2,从而延长寿命.
结论:
- PAR-1/MARK 激酶是DAF-16的新型调节剂,将细胞极性通路与胰岛素信号传递和衰老联系起来.
- 通过PAR-1在S249的DAF-16酸化是一个由胰岛素信号调节的关键事件,影响寿命.
- 鉴定ZFH-2作为DAF-16交互体,为研究FOXO介导寿命和DNA修复途径开辟了新的途径.
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