线粒体相关的凝聚物维持线粒体平衡,并促进寿命
Yan Bai1, Tengfei Ma1, Shan Zhao1
1State Key Laboratory of Conservation and Utilization of Bio-resources in Yunnan and Center for Life Sciences, School of Life Sciences, Yunnan University, Kunming, China.
Nature aging
|September 10, 2025
概括
由LARP-1蛋白形成的线粒体关联翻译器官 (MATO) 合成了必需的线粒体蛋白质. 在衰老和饥饿期间持久的MATO通过维护线粒体健康来延长寿命.
科学领域:
- 细胞生物学 细胞生物学
- 线粒体生物学 线粒体生物学
- 衰老研究研究 衰老研究
背景情况:
- 无膜有机体通过液-液相分离来调节细胞过程.
- 无膜有机体在线粒体平衡中的作用在很大程度上是未知的.
研究的目的:
- 为了研究无膜有机体在维护线粒体平衡中的参与.
- 确定这些细胞器调节线粒体结构和功能的机制.
主要方法:
- 使用Caenorhabditis elegans作为一个模型生物.
- 研究了RNA结合蛋白LARP-1在有机细胞形成和线粒体结合中的作用.
- 分析了野生类型和LARP-1缺乏的虫中的蛋白质合成,线粒体结构和ATP生产.
- 在衰老和饥饿期间检查了MATO动态.
主要成果:
- 发现了线粒体相关的翻译器官 (MATO),它们在局部合成了对线粒体维护至关重要的蛋白质.
- 通过液-液相分离,LARP-1协调MATO的形成,与依赖于外膜复合物的转位酶的线粒体结合.
- LARP-1 缺乏导致线粒体蛋白质水平降低,体组织受损,ATP 生产减少.
- 确定IMMT-1 (MIC60) 和ATP-2作为在LARP-1 MATO中合成的关键蛋白质,对体组织至关重要.
- 在衰老和饥饿期间观察到MATO与线粒体的分离,持续的MATO延长了寿命.
结论:
- 通过LARP-1介导的MATO对线粒体蛋白质合成和恒温至关重要.
- 在衰老和压力期间,MATO动态对线粒体健康至关重要.
- 线粒体持久的LARP-1 MATOs代表了一种延长寿命和保护线粒体健康的新机制.
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