一个关于Frizzled-G蛋白合的框架,以及对PCP信号通路的影响
Zhibin Zhang1,2, Xi Lin1, Ling Wei3
1iHuman Institute, ShanghaiTech University, Shanghai, China.
Cell discovery
|January 5, 2024
概括
研究人员阐明了Frizzled受体 (FZD) 的激活机制,这些受体对Wnt信号传递和发育至关重要. 结构和功能研究揭示了一个共享的激活框架和癌症和白内障等疾病的潜在治疗点.
科学领域:
- 分子生物学分子生物学
- 结构生物学 结构生物学
- 细胞信号传递 细胞信号传递
背景情况:
- 色受体 (FZDs) 是Wnt信号传递的组成部分,影响胚胎发育和瘤发生.
- 具体而言,FZD6在镜片的发展中起着至关重要的作用,使其激活机制成为研究的关键领域.
- 了解FZD激活对于针对各种疾病中的这些受体至关重要.
研究的目的:
- 为了确定FZD6,FZD3和FZD1的冷电子显微镜 (冷EM) 结构,在活跃和不活跃状态.
- 阐明所有十个Frizzled受体的共享激活框架.
- 在FZD6.6中研究G蛋白合和平面细胞极性 (PCP) 信号之间的功能交叉.
主要方法:
- 低温电子显微镜 (cryo-EM) 用于获得高分辨率的结构.
- 位点导向的突变发生以探测受体功能.
- 在人眼镜上皮质组织上进行成像和功能测试.
主要成果:
- 呈现了FZD6,FZD3和FZD1在apo (不活跃) 和G蛋白结合 (活跃) 状态中的冷EM结构.
- 确定了适用于所有十个Frizzled受体的保存激活框架.
- 在FZD6 G-蛋白合和PCP信号通路之间展示了潜在的交叉声.
结论:
- 该研究提供了对Frizzled受体结构和功能的综合理解.
- 跨FZD的共享激活机制为治疗干预提供了一个统一的目标.
- 这些发现为开发用于癌症和白内障等疾病中FZD信号的新型调节器奠定了基础.
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