14-3-3的结构基础是:类的结合特异性
M B Yaffe1, K Rittinger, S Volinia
1Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215, USA.
Cell
|January 15, 1998
概括
研究人员确定了14-3-3蛋白家族的两个关键结合基因 (RSXpSXP和RXY/FXpSXP),这对细胞信号传递至关重要. 这些发现揭示了14-3-3蛋白与其他分子的相互作用.
科学领域:
- 分子生物学分子生物学
- 蛋白质生物化学 蛋白质生物化学
- 细胞信号传递 细胞信号传递
背景情况:
- 14-3-3蛋白家族在调解信号传导通路方面发挥着至关重要的作用.
- 这些蛋白质通过结合含有素的特定标蛋白来起作用.
- 了解这些相互作用是解读蜂通信网络的关键.
研究的目的:
- 识别和描述14-3-3蛋白家族所识别的结合基因.
- 为了阐明14-3-3蛋白质-连接体相互作用的结构基础.
- 探索这些相互作用对细胞信号传递机制的影响.
主要方法:
- 利用以素为导向的类库来探测哺乳动物和酵母14-3-3蛋白质.
- 确定了14-3-3zeta复合体的晶体结构,具有素素图案.
- 在晶体结构中分析了蛋白相互作用.
主要成果:
- 确定了两个主要的14-3-3结合基因:RSXpSXP和RXY/FXpSXP.
- 在14-3-3zeta复合体中观察到特定的形状,包括一个cis-conformation proline残留物.
- 证明14-3-3二聚体结合于双联索素基因,这表明一种双酸结合机制.
结论:
- 已识别的基因在已知的14-3-3结合蛋白中普遍存在.
- 结构数据为观察到的类库结果提供了分子基础.
- 双酸与联动因子的关联代表了Raf,BAD和Cbl.等蛋白质的显著信号机制.
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