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压力颗粒,P体和细胞衰老:一个生物信息学研究
Yakov I Mokin1, Nikolay S Ilyinsky2, Semen V Nesterov2
1Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064, St. Petersburg, Russia.
Biochemical and biophysical research communications
|December 26, 2023
概括
衰老会损害像压力颗粒 (SG) 和P体这样的无膜有机体 (MLO). 与P体蛋白不同的是,SG蛋白更容易改变MLOs.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 衰老研究研究 衰老研究
背景情况:
- 衰老与压力诱导的无膜有机细胞 (MLO) 的功能障碍和物质特性变化有关.
- 压力颗粒 (SG) 和P体是参与细胞应激反应的关键MLO.
- 了解MLOs在衰老过程中的蛋白质变化对于破译细胞衰老至关重要.
研究的目的:
- 分析SG和P体的蛋白质组,寻找影响MLO物理状态的蛋白质,特别是那些在老化过程中表达变化的蛋白质.
- 调查细胞衰老期间MLOs中内在无序蛋白质和液态液态相分离 (LLPS) 的作用.
- 为了确定与老化相关的MLOs内的特定蛋白质特征和相互作用.
主要方法:
- 对SG和P体进行蛋白质组分析.
- 蛋白质性质的生物信息分析,包括电荷,结合能力 (DNA/RNA) 和氨基原性潜力.
- 识别MLOs内与衰老相关的蛋白质的蛋白质-蛋白质相互作用网络.
主要成果:
- 多种类型的物质富含着内在无序的蛋白质,其中30-40%能够进行液态液相分离 (LLPS).
- 在衰老过程中基因表达发生改变的蛋白质占研究的MLO蛋白质的20%左右,显示出正电荷增加.
- 与P体蛋白相比,SG蛋白,特别是那些参与衰老的蛋白质,表现出较高的DNA结合和氨基基基因潜力.
结论:
- 在老化过程中,SG蛋白比P-body蛋白更有可能改变MLOs的物理状态.
- MLOs,特别是SG,通过协调的蛋白相互作用和改变材料特性,在细胞衰老中发挥着重要作用.
- 这些发现凸显了MLOs在衰老和衰老中的动态性质.
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