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関連する概念動画

Inhibition of Cdk Activity02:34

Inhibition of Cdk Activity

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The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
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Positive Regulator Molecules02:39

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Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.
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To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.
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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...
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S-Cdk Initiates DNA Replication02:38

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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).
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In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of...
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The cell cycle regulation directs how a cell proceeds from one phase to the next and begins mitosis. The cell cycle control system includes intracellular regulatory molecules and external triggers. They provide "stop" or "advance" signals and operate at specific cell cycle stages termed checkpoints to ensure that a particular process is completed before the cell advances to the next phase.
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Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay
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CDK基質のリン酸化と細胞循環の順序付け

Matthew P Swaffer1, Andrew W Jones2, Helen R Flynn3

  • 1Cell Cycle Laboratory, The Francis Crick Institute, London NW1 1AT, UK.

Cell
|December 17, 2016
PubMed
まとめ
この要約は機械生成です。

単一のサイクリン依存キナーゼ (CDK) 複合体は,基質のリン酸化を正確に制御することによって,細胞サイクルイベントを一時的にオーダーすることができます. CDKの活性と基板の感受性の上昇は,適切な細胞分裂の進行を保証する明確な値を生成します.

キーワード:
CDK についてSフェーズ細胞サイクルサイクリン依存キナーゼキナーゼミトシスフォスフォプロテオミックリン酸化

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Last Updated: Nov 13, 2025

Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay
12:26

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Combining Mitotic Cell Synchronization and High Resolution Confocal Microscopy to Study the Role of Multifunctional Cell Cycle Proteins During Mitosis
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科学分野:

  • 細胞生物学
  • 分子生物学
  • 生物化学

背景:

  • 細胞サイクルの進行は,サイクリン依存キナーゼ (CDK) コンプレックスに依存する.
  • S相とミトーシスの時間的な順序は細胞分裂に不可欠です.
  • 以前のモデルでは,基板特異性ではなく,CDKの総活性レベルが細胞周期のタイミングを決定することを示唆していた.

研究 の 目的:

  • 細胞サイクル中にCDK基板がどのように時間的に順序付けられているかを調査する.
  • 細胞循環の調節におけるCDKの活性レベルと基板の感受性の役割を決定する.
  • 核分裂酵母におけるCDK基質のリン酸化パターンを分析する.

主な方法:

  • 核分裂酵母におけるCDK基質のフォスフォプロテオミクスベースのシステム分析
  • 野生型の細胞との比較分析
  • CDKの活性と基質のリン酸化ダイナミクスの測定

主要な成果:

  • 単一のサイクリン-CDK複合体は,異なる基質のリン酸化を一時的に命令することができる.
  • 増加するCDK活性と異なる基板の感受性は,特定の活性値を生み出します.
  • 素酸化の急速な回転は,細胞サイクルイベントの固有の基板特異的な活性値を確保します.

結論:

  • CDKの活性レベルと基板の感受性は,細胞サイクルイベントの時間的な順序付けの重要なメカニズムです.
  • サイクリン基板特異性および活性値は,リン酸化パターンを微調整するために一緒に働く.
  • このメカニズムは,下流の細胞サイクルイベントの正確な実行を保証します.