内素-CIN85-Cbl复合体调节了c-Met的依赖于连接体的下调调
Annalisa Petrelli1, Giorgio F Gilestro, Stefania Lanzardo
1CNR-CIOS and Department of Genetics, Biology and Biochemistry, University of Torino, 10126 Torino, Italy.
Nature
|March 15, 2002
概括
一个新发现的综合体涉及内啡,CIN85和Cbl调节肝细胞生长因子 (HGF) 受体 (Met) 内化. 这一发现澄清了HGF受体信号传递和内细胞分裂机制.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 信号传输 信号传输
背景情况:
- 氨酸激酶受体下调对于信号调制至关重要.
- 肝细胞生长因子 (HGF) 受体 (Met) 在结合联体时经历多基化和降解.
- HGF受体内细胞结核的机制在很大程度上是未知的.
研究的目的:
- 阐明调控HGF受体 (Met) 内细胞分裂的分子机制.
- 为了确定负责HGF受体内部化的蛋白质复合体.
- 调查Cbl在HGF受体信号传递和内细胞分裂中的作用.
主要方法:
- 研究了内啡林,CIN85和Cbl在受体内细胞分裂中的作用.
- 利用生物化学分析来证明复杂的形成和结合相互作用.
- 评估了抑制复合体形成对HGF受体内化和信号传递的影响.
主要成果:
- 一种内素,CIN85和Cbl的复合体控制着HGF受体内细胞分裂.
- 内素促进了克拉斯林涂层囊泡的形成和膜浸.
- Cbl 泛基酸激活 HGF 受体,并招募内林-CIN85 复合体进行内部化.
- 这种复合体的抑制阻断了HGF受体内部化,并增强了信号传递.
结论:
- 揭示了一种用于HGF受体 (Met) 内细胞分裂的新机制,涉及内基因,CIN85和Cbl.
- 建立了Cbl,受体信号传递和内细胞分裂之间的功能联系.
- 证明Cbl在调节HGF受体活性和生物反应方面发挥着关键作用.
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