Nde1促进了Lis1介导的dynein的激活
Yuanchang Zhao1,2, Sena Oten2, Ahmet Yildiz3,4,5
1Physics Department, University of California, Berkeley, CA, 94709, USA.
Nature communications
|November 8, 2023
概括
Nde1和Lis1蛋白质一起工作,激活dynein运动蛋白质复合体. Nde1将Lis1招募到dynein中,从而启动了这种必不可少的细胞运输机械的组装和运动.
科学领域:
- 细胞生物学 细胞生物学
- 分子电机分子电机
- 蛋白相互作用 蛋白相互作用
背景情况:
- 细胞质氨酸对细胞内运输至关重要,向微管体减去末端移动.
- Lis1和Nde1/Ndel1促进了dynein复杂组装与dynactin和货物适配器.
- 人们认为Lis1可以缓解dynein的自身抑制,但Nde1/Ndel1的作用尚不清楚.
研究的目的:
- 研究人类Nde1和Lis1在哺乳动物dynein组合和运动中的调节作用.
- 阐明Nde1和Lis1协同激活dynein运输的机制.
主要方法:
- 在体外溶解试验.
- 单分子成像技术.
- 蛋白质与蛋白质相互作用的分析.
主要成果:
- Nde1将Lis1招募到自抑制的dynein,促进Lis1介导的dynein-dynactin适应器复合体的组合.
- Nde1与PAF-AH1B在Lis1结合方面竞争,可能破坏非催化子单元的招募,并有利于Lis1-dynein相互作用.
- 对dynein的dynein结合取代了Nde1,这表明在运动开始之前有一个调节步骤.
结论:
- Nde1和Lis1在协同作用下激活了dynein运输机制.
- Nde1通过竞争Lis1结合来促进Lis1介导的丁氨酸激活.
- 在dynectin关联后Nde1的解离是启动dynein运动性的关键步骤.
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