Nde1促进Lis1结合到全长的自抑制人体dynein-1
Jun Yang1,2, Yuanchang Zhao3,4,2, Pengxin Chai1,2
1Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, 06511, USA.
bioRxiv : the preprint server for biology
|January 13, 2025
概括
Nde1增强了Lis1与细胞质dynein-1 (dynein) 的结合,揭示了PhiL-Lis1中间体,这对于激活dynein运输至关重要. 这说明了Nde1是如何促进dynein电机打开的.
科学领域:
- 细胞生物学 细胞生物学
- 分子运动功能的分子运动功能.
- 蛋白质与蛋白质的相互作用
背景情况:
- 细胞质的dynein-1对于逆向细胞内运输至关重要.
- 迪尼因激活需要Lis1和Nde1/Ndel1来打开其自身抑制的Phi构造.
- 这种激活的确切机制仍然不完全理解.
研究的目的:
- 阐明Nde1促进Lis1介导的丁氨酸激活的机制.
- 为了确定dynein激活途径中的中间状态.
主要方法:
- 生物化学复制 生物化学复制
- 低温电子显微镜的使用方法
- 变异性研究的研究.
- 运动性检测试验
主要成果:
- Nde1显著增强了Lis1与自身抑制的dynein的结合.
- 一种新的中间体,PhiL-Lis1,被确定为Lis1在dynein运动环之间结合的地方.
- 在PhiL-Lis1状态下,Lis1与两种dynein运动域的特定区域相互作用.
- PhiL-Lis1接口对氨酸激活至关重要,而Nde1便于其形成,而不是其中的一部分.
结论:
- 迪内因激活涉及一个独特的PhiL-Lis1中间状态.
- Nde1对Lis1起到至关重要的促进作用,使其能够打开自身抑制的dynein电机.
- 这些发现为dynein运输调节提供了机制性的见解.
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