Cdc2キナーゼは,cis-Golgiマトリックスタンパク質GM130を直接リン酸化し,ミトーシスのGolgi断片化に必要とされる
M Lowe1, C Rabouille, N Nakamura
1Cell Biology Laboratory, Imperial Cancer Research Fund, London, United Kingdom.
Cell
|September 30, 1998
まとめ
ミトティック・ゴルギの断片化は,Cdc2キナーゼにより,Ser-25でGM130をリン酸化し,p115結合を阻害する. このプロセスはMEK1 MAPキナーゼ経路を必要としません.
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:
- ミトス・ゴルギ分裂は,細胞分裂中の重要な出来事です.
- GM130とp115の相互作用の破壊は,ゴルギの断片化を誘導すると考えられている.
- 関連する正確な分子機構とシグナル伝達経路は,まだ完全に理解されていません.
研究 の 目的:
- ミトーシス中のGM130の破壊に責任を負う特定のキナーゼとリン酸化部位を特定する.
- ミトスのゴルギ分裂におけるMEK1-MAPキナーゼ経路の役割を調査する.
主な方法:
- 責任のあるキナーゼを特定するためのインビトロキナーゼアッセイ.
- サイト・ディレクテッド・ミュータゲネシスにより,GM130.0の重要なリン酸化部位を特定する.
- MEKの必要性を評価するためのインビトロおよびインビボ実験1.
主要な成果:
- GM130のセリン-25 (Ser-25) は,重要なリン酸化部位として特定されました.
- Cdc2キナーゼは,Ser-25.5でのGM130のリン酸化に責任を負う酵素として特定されました.
- MEK1はGM130のリン酸化やゴルギ分裂には必要ではないことが判明しました.
結論:
- Cdc2は,GM130をセル25で直接リン酸化し,ゴルギ分裂を引き起こします.
- MEK1-MAPキナーゼ経路は,ミトスのゴルギ分裂に不可欠ではありません.
- この研究は,基本的な細胞分裂プロセスにおけるキナーゼの直接的関与を明らかにしています.
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関連する概念動画
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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.
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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.
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00:50Anaphase Promoting Complex
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