酵母ヒッポの経路の活性化は,シグナル伝達複合体のリン酸化依存組成によるものです
Jeremy M Rock1, Daniel Lim, Lasse Stach
1David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
まとめ
細胞シグナル伝達構造は,細胞の意思決定を導く. ミトスの脱出ネットワーク (MEN) は,Cdc15がNud1をリン酸化し,Dbf2-Mob1の活性化を可能にし,細胞循環の調節における重要なメカニズムである2段階のプロセスを使用します.
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:
- 脚本タンパク質は,信号伝達経路において重要な役割を果たします.
- 芽生えた酵母におけるミトーシス脱出ネットワーク (MIT) は,細胞サイクル進行を調節する.
- MEN経路は進化的に保存され,メタゾーンにおけるヒッポ経路と同型である.
研究 の 目的:
- MENキナーゼカスケード内の信号伝達のメカニズムを解明する.
- MEN経路の活性化におけるスカフォールドタンパク質Nud1の役割を調査する.
- 効果因子キナーゼ複合体Dbf2-Mob1がどのように活性化されるかを理解する.
主な方法:
- リン酸化測定は,キナーゼ活性を検出する.
- タンパク質の相互作用を研究するための共免疫プレシピテーション.
- モデル生物としての芽生える酵母 (Saccharomyces cerevisiae) の分析.
主要な成果:
- MENカスケードを通じたシグナル伝達には,新しい2段階のアクティベーションプロセスが含まれています.
- MENキナーゼCdc15は,足場Nud1.1をリン酸化する.
- 酸化されたNud1はDbf2-Mob1の結合部位を作り,Cdc15.1によって活性化されます.
結論:
- 発見は,MEN経路における脚架支援信号伝達のユニークなメカニズムを明らかにしています.
- この2段階のリン酸化とドッキングプロセスは,Dbf2-Mob1キナーゼ複合体の活性化に不可欠です.
- このメカニズムは,他のキナーゼカスケードにおける信号伝送の一般的な原理を表すかもしれません.
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