一个诱导的Ets抑制器复合体调节了终端巨分化期间的生长停止
Günter W Klappacher1, Victoria V Lunyak, David B Sykes
1Department of Cellular and Molecular Medicine, Howard Hughes Medical Institute, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
Cell
|May 15, 2002
概括
埃特斯抑制剂METS/PE1通过阻断细胞循环基因,在巨分化过程中阻止细胞分裂. 这需要与DP103和E2F/pRB蛋白相互作用,以实现永久的细胞循环退出.
科学领域:
- 分子生物学分子生物学
- 发育生物学是发展生物学.
- 细胞周期调节细胞周期调节
背景情况:
- 细胞增殖和分化的协调调节对于发育至关重要.
- 了解控制分化过程中细胞循环停止的分子开关是一个关键的挑战.
研究的目的:
- 阐明ETS抑制器METS/PE1将终端分化与细胞循环停止联系在一起的分子机制.
- 研究METS/PE1在调节巨细胞的增殖和分化中的作用.
主要方法:
- 利用巨细胞作为一个模型系统.
- 研究了METS/PE1与细胞循环控制基因和增殖途径的相互作用.
- 研究了DP103和E2F/pRB家族蛋白质在METS/PE1介导的细胞循环中所扮演的角色.
主要成果:
- 在巨细胞中,METS/PE1诱导与终端分化和细胞循环停止相关.
- METS/PE1选择性地将Ets激活剂从细胞周期基因促进剂中取代,抑制Ras依赖的增殖.
- METS/PE1的抗增殖功能取决于它与DP103的相互作用,形成一个新的核心压缩复合体.
- 为了抑制增殖,METS/DP103复合体和E2F/pRB蛋白之间的功能相互作用至关重要.
结论:
- METS/PE1 作为终端分化和细胞周期结束之间的关键环节.
- METS/PE1-DP103复合体与E2F/pRB蛋白结合,建立了一个组合码,用于在分化过程中永久停止细胞循环.
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