相关实验视频
Updated: May 10, 2026

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Spatial and Temporal Analysis of Active ERK in the C. elegans Germline
Published on: November 29, 2016
在G2/M过渡期间,ERK-MAP激酶对Cdc25C进行调节
Ruoning Wang1, Guangan He, Mayra Nelman-Gonzalez
1Department of Experimental Therapeutics, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA.
Cell
|March 27, 2007
概括
线素激活蛋白激酶 (MAPK) 途径对于细胞周期进展至关重要. 这项研究表明,ERK-MAP激酶直接酸化并激活Cdc25酸酶,这是G(2) /M转变的关键调节者,在介质和线粒细胞周期中.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- G(2) / M 阶段过渡是由蛋白质酸酶 Cdc25 调节的,它需要通过酸化来激活.
- 虽然Cdc2/cyclin B和Polo-like kinase (PLK) 可以在体外激活Cdc25,但它们的活性不足以解释M阶段诱导期间的Cdc25激活.
研究的目的:
- 为了研究p42MAP激酶 (MAPK) 的作用,ERK2的Xenopus ortolog,在G(2) / M过渡期间激活Cdc25.
- 为了确定ERK-MAP激酶是否参与哺乳动物细胞中的Cdc25激活.
主要方法:
- 在Xenopus卵和卵细胞中对蛋白质相互作用和酸化的分析.
- 在哺乳动物细胞系中抑制ERK激活,以评估其对Cdc25C酸化和激活的影响.
主要成果:
- p42 MAPK被确定为M相停止的Xenopus蛋提取物中主要的Cdc25酸化激酶.
- 在Xenopus卵细胞中,p42 MAPK与Cdc25相互作用,并在介质诱导过程中在特定位置 (T48,T138,S205) 酸化它,增强其酸酶活性.
- 在哺乳动物细胞中,ERK1/2与Cdc25C相互作用,并在线粒分裂过程中在T48酸化它. 抑制ERK激活部分损害了Cdc25C激活和线粒诱导.
结论:
- 在G(2) /M过渡期间,ERK-MAP激酶直接参与Cdc25的激活.
- 这种机制在不同物种中得到保护,突出了ERK-MAP激酶在细胞循环调节中的基本作用.
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Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...

