COP9信号体和PRMT5甲基体复合体是基于Lis1-dynein的传输的重要调节者
Devanshi Gupta1, Subbareddy Maddika2
1Laboratory of Cell Death & Cell Survival, Centre for DNA Fingerprinting and Diagnostics (CDFD), Uppal, Hyderabad, India; Graduate Studies, Regional Centre for Biotechnology, Faridabad, India.
Cell reports
|December 17, 2025
概括
Lis1 作为一个转换器,用于细胞质的dynein,一个运动蛋白质. 它使用COP9信号体 (CSN) 来禁用dynein和蛋白质氨酸甲基转移酶5 (PRMT5) 来激活它,控制细胞运输.
科学领域:
- 分子生物学分子生物学
- 细胞运输机制的细胞运输机制.
- 蛋白质的调节 蛋白质的调节
背景情况:
- 细胞质二烯对于沿微管细胞内的细胞内运输至关重要.
- Lis1是已知的dynein调节剂,但其在激活和抑制中的对立作用尚未完全理解.
- 在dynein调节中Lis1的双重功能背后的分子机制需要阐明.
研究的目的:
- 确定调解 Lis1 对 dynein 的相反作用的分子复合体.
- 阐明Lis1通过什么机制在非活性和活性状态之间切换dynein的机制.
- 为Lis1对dynein的上下文依赖调节提供一个机制基础.
主要方法:
- 同免疫沉测试以确定相互作用的蛋白质复合体.
- 在体外测试以评估dynein活性和neddylation状态.
- 位点定向突变发生,以调查特定蛋白质修饰的作用.
主要成果:
- COP9信号体 (CSN) 复合体被Lis1招募到dynein中,促进脱和失活.
- 蛋白质氨酸甲基转移酶5 (PRMT5) 甲基化Lis1,将其功能切换为一个积极的调节器.
- 通过PRMT5介导的修改会取代CSN,恢复dynein的缩,并激活机动交通.
结论:
- Lis1集成了CSN和PRMT5的信号,以动态调节dynein活动.
- 受到CSN影响的dynein无化状态对于活跃的运输复合体组装至关重要.
- 这项研究揭示了一个新的调节轴,通过Lis1.1.的翻译后修改来控制dynein功能.
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