核心Nup358-BicD2接口的结构模型
James M Gibson1, Xiaoxin Zhao2, M Yusuf Ali3
1Department of Biological Sciences, Department of Chemistry and Chemical Biology, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA.
Biomolecules
|October 28, 2023
概括
迪内因适配器Bicaudal D2 (BicD2) 通过两个接口与Nup358结合,揭示了神经元发育中载荷选择的结构机制.
科学领域:
- 细胞生物学 细胞生物学
- 结构生物学是结构生物学.
- 神经科学是一个神经科学.
背景情况:
- 迪内因电机驱动微管沿着微管进行必要的减去终端定向运输.
- 双尾D2 (BicD2) 是一个关键的适应蛋白,它将细胞载荷与dynein电机连接起来.
- Nup358是一个被BicD2识别的货物,对于区分大脑前代细胞的核定位至关重要.
研究的目的:
- 为了阐明BicD2-Nup358相互作用的结构细节.
- 了解BicD2如何选择Nup358货物用于dynein介导的运输.
- 为BicD2在大脑发育中的作用提供结构基础.
主要方法:
- 使用AlphaFold2,HADDOCK和ClusPro的计算建模.
- 现场定向的突变发生以探测BicD2-Nup358接口.
- 蛋白质与蛋白质相互作用和结构接口的分析.
主要成果:
- 在Nup358的货物识别α-螺旋环绑定BicD2 (残留物747-774) 在一个反平行螺旋捆,稳定盐桥.
- 二级接口涉及一个内在无序的Nup358区域绑定BicD2 (残留物774-800).
- 这个BicD2区域也绑定了Rab6,这表明对货物适配器的竞争.
结论:
- 通过BicD2.2建立了Nup358货物识别的结构基础.
- 确定了双结合接口,包括与内在无序区域的新型相互作用.
- 突出了BicD2选择货物的机制,影响神经元发育途径.
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