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在β-catenin破坏复合体中YAP/TAZ的结合协调了Wnt反应
Luca Azzolin1, Tito Panciera1, Sandra Soligo1
1Department of Molecular Medicine, University of Padua School of Medicine, viale Colombo 3, 35126 Padua, Italy.
Cell
|July 1, 2014
概括
河马通路蛋白YAP/TAZ与β-catenin破坏复合体集成,调节Wnt信号传输. 它们的释放激活了Wnt/YAP/TAZ效应,对器官大小和再生至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 发展生物学 发展生物学
背景情况:
- 河马路径传感器YAP/TAZ在Wnt信号传输中具有复杂的作用.
- 连接YAP/TAZ和Wnt信号的机制尚未完全理解.
研究的目的:
- 阐明YAP/TAZ与Wnt信号交互和调节的分子机制.
- 研究YAP/TAZ在β-catenin破坏复合体中的作用.
主要方法:
- 生物化学测试以评估蛋白质相互作用.
- 细胞系中的功能研究.
- 在相关模型中进行基因分析.
- 生物密室再生试验.
主要成果:
- YAP和TAZ是β-catenin破坏综合体的组成部分,作为细胞质沉降器.
- 在Wnt-ON细胞中,YAP/TAZ从复合体中释放出来,使核积累和Wnt/YAP/TAZ信号产生.
- YAP/TAZ对于APC缺乏引起的肠道密室过度生长和活体密室再生至关重要.
- 在Wnt-OFF细胞中,YAP/TAZ促进β-TrCP的招募和β-catenin的失活.
- 失去YAP/TAZ会维持不分化的胚胎干细胞的β-catenin依赖维护.
结论:
- YAP/TAZ作为β-catenin破坏复合体中的关键调节剂,桥接Hippo和Wnt通路.
- 这种相互作用框架对于控制器官大小,再生过程和瘤抑制至关重要.
- YAP/TAZ与破坏综合体之间的动态相互作用为发展和疾病机制提供了新的见解.
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