サイクリンB-Cdkによるリン酸化は,核中からミトの脱出アクティベーターCdc14の放出を基礎としています
Ramzi Azzam1, Susan L Chen, Wenying Shou
1Division of Biology, California Institute of Technology, Pasadena, CA 91125, USA.
Science (New York, N.Y.)
|July 27, 2004
まとめ
発芽酵母タンパク質ファスファテーズCdc14は,FEARネットワークによって核から放出されます. このネットワークは,サイクリン依存キナーゼ (Cdk) によってNet1のリン酸化を促進し,ミトーシスからタイムリーに脱出することを可能にします.
科学分野:
- 細胞サイクル調節 細胞サイクル調節
- ミトスの出口はミトスの出口です.
- 芽生える酵母遺伝学
背景:
- タンパク質フォスファタゼCdc14は,芽生えた酵母におけるミトスの脱出の鍵です.
- Cdc14は,インターフェーズ中にNet1によって核内に隔離されます.
- Cdc14早期アナフェーズ放出 (FEAR) ネットワークは,Cdc14の分散を制御しています.
研究 の 目的:
- FEARネットワークの規制メカニズムを調査する.
- Cdc14放出におけるサイクリン依存キナーゼ (Cdk) の役割を解明する.
- Net1のリン酸化がミトスの進行にどのように影響するかを理解するために.
主な方法:
- イースト遺伝学と分子生物学技術.
- タンパク質のリン酸化イベントの分析.
- 細胞サイクル進行とミトーシスイベントの観察.
主要な成果:
- FEARネットワークは,Cdk-サイクリンB1/B2複合体によるNet1リン酸化を促進しています.
- Net1のリン酸化は,FEAR媒介のCdc14放出に不可欠である.
- これらのイベントは,遅期のミトーシスイベントのタイムリーな実行に不可欠です.
結論:
- Cdkが関与する規制回路は,適切なミトの退去を保証します.
- FEARネットワークによるNet1のCdk媒介型リン酸化は,重要な制御ポイントです.
- このメカニズムは,細胞サイクルを通して正確な進行を保証します.
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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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02:38S-Cdk Initiates DNA Replication
The cell cycle is a series of events leading to DNA duplication followed by the division of cell content to form two daughter cells. The cell cycle progresses in four stages—the cell increases in size (gap 1 or G1-phase), duplicates its DNA (synthesis or S-phase), prepares to divide (gap 2 or G2-phase), and divides (mitosis or M-phase).
Two states at the origin of replication
In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of replication.
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In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of replication.
02:15M-Cdk Drives Transition Into Mitosis
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.
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