関連する実験動画
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
G2/M移行中のERK-MAPキナーゼによるCdc25Cの調節
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
まとめ
ミトゲン活性化タンパク質キナーゼ (MAPK) 経路は,細胞サイクル進行において極めて重要です. この研究は,ERK-MAPキナーゼが直接Cdc25フォスファタゼをリン酸化し活性化することを明らかにし,Cdc25フォスファタゼは,メオティックとミトティックの両方の細胞サイクルにおけるG(2) /M移行の重要な調節因子である.
科学分野:
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- G(2) /M相移行は,タンパク質フォスファターゼCdc25によって調節され,フォスフォリレーションによる活性化が必要です.
- Cdc2/サイクリンBとポロのようなキナーゼ (PLK) がCdc25をインビトロで活性化することができるが,M相誘導時のCdc25活性化を説明するには,それらの活性だけでは不十分である.
研究 の 目的:
- ERK2のXenopusオートログであるp42 MAPキナーゼ (MAPK) が,G(2) / M移行中のCdc25の活性化における役割を調査する.
- ERK-MAPキナーゼが哺乳類の細胞におけるCdc25活性化に関与しているかどうかを判断する.
主な方法:
- クセノプスの卵エキスと卵細胞におけるタンパク質の相互作用とリン酸化の分析.
- 哺乳類の細胞系におけるERK活性化の阻害は,Cdc25Cのリン酸化と活性化に及ぼす影響を評価するためである.
主要な成果:
- p42 MAPKは,M相停止のXenopus卵抽出物における主要なCdc25リン酸化キナーゼとして特定されました.
- Xenopusの卵細胞では,p42 MAPKはCdc25と相互作用し,中介誘導の際に特定の部位 (T48,T138,S205) でそれをリン酸化し,そのリン酸酶活性を増強する.
- 哺乳類の細胞では,ERK1/2はCdc25Cと相互作用し,ミトーシス中のT48でそれをリン酸化する. ERK活性化の阻害は,Cdc25C活性化とミトーシス誘導を部分的に低下させた.
結論:
- ERK-MAPキナーゼは,G(2) / M移行中のCdc25の活性化に直接関与しています.
- このメカニズムは種ごとに保たれ,細胞周期調節におけるERK-MAPキナーゼの基本的役割を強調しています.
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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...

