一个GDNF-GFRα1突触粘附组件的架构和调节
F M Houghton1, S E Adams1,2, A S Ríos3
1Signalling and Structural Biology laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK.
Nature communications
|November 21, 2023
概括
质细胞系衍生神经营养因子 (GDNF) 与GFRα1形成一个十度组合,独立于RET信号传递,调解细胞粘附. 这种结构揭示了GDNF-GDNF-GFRα1复合体如何驱动膜粘附.
科学领域:
- 神经科学是一个神经科学.
- 结构生物学 结构生物学
- 细胞生物学 细胞生物学
背景情况:
- 结细胞系衍生神经营养因子 (GDNF) 通过RET受体氨酸激酶激活对神经元的生存和神经保护至关重要.
- 此外,GDNF-GFRα1复合体还调解突触细胞粘附,这是独立于RET信号的功能.
研究的目的:
- 阐明负责细胞粘附的GDNF-GFRα1组合的结构基础.
- 了解GDNF-GFRα1复合体调解膜粘附的机制.
- 为了研究RET信号传递,肝素硫酸盐和GDNF驱动的细胞粘附之间的相互作用.
主要方法:
- 结晶学和电子显微镜以确定GDNF-GFRα1组合的结构.
- 低温电子断层扫描可视化膜粘附功能.
- 在体外 (原生PAGE) 和细胞内 (细胞聚类,树突脊柱测试) 验证GFRα1:GFRα1米面接.
- 生物化学和基于细胞的测试,以研究RET和肝硫酸盐的作用.
主要成果:
- 该结构揭示了由两个GFRα1五聚体组成的十聚体组件,由五个GDNF二聚体搭建桥梁.
- 低温电子断层扫描可视化了脂质体之间复杂的介导膜粘附.
- 该GFRα1:GFRα1美基接口在体外和细胞内得到了验证.
- 发现RET和海帕兰硫酸盐与粘附接口竞争,防止复杂的组装.
结论:
- 建立了一个独立于RET信号的GDNF驱动细胞粘附的机制框架.
- 这项研究强调了GFRα1在调解热量信号和细胞粘附方面的核心作用.
- 这些发现提供了关于RET和海帕兰硫酸盐对GDNF介导的细胞粘附的调节的见解.
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