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相关概念视频

Positive Regulator Molecules01:45

Positive Regulator Molecules

To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.
Negative Regulator Molecules01:23

Negative Regulator Molecules

Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
Positive Regulator Molecules02:39

Positive Regulator Molecules

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.
Inhibition of Cdk Activity02:34

Inhibition of Cdk Activity

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...
M-Cdk Drives Transition Into Mitosis02:15

M-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...
Inhibition of CDK Activity02:34

Inhibition of CDK Activity

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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相关实验视频

Updated: May 13, 2026

Analysis of Cell Cycle Position in Mammalian Cells
12:19

Analysis of Cell Cycle Position in Mammalian Cells

Published on: January 21, 2012

循环C/cdk3促进了Rb依赖的G0退出.

Shengjun Ren1, Barrett J Rollins

  • 1Department of Medical Oncology, Dana-Farber Cancer Institute, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.

Cell
|April 16, 2004
PubMed
概括

细胞G0退出涉及环林C和cdk3,它们酸化pRb以使细胞循环重新进入. 这种独特的cyclin/cdk组合调节G0/G1过渡,类似于G1/S阶段调节.

科学领域:

  • 细胞生物学 细胞生物学
  • 分子生物学分子生物学
  • 生物化学 生物化学

背景情况:

  • 细胞周期涉及不同的阶段,包括G0 (休息状态) 和G1 (准备DNA合成).
  • 虽然G1/S过渡是众所周知的,但对G0/G1过渡的调节在很大程度上是未知的.
  • 视网母细胞瘤蛋白 (pRb) 失活对于从G0.0.重新进入细胞周期至关重要.

研究的目的:

  • 研究调节G0/G1过渡的分子机制.
  • 为了确定参与pRb酸化的关键蛋白质在G0输出过程中.
  • 阐明环林C及其相关激酶在G0/G1调节中的作用.

主要方法:

  • 在G0退出期间分析环林CmRNA水平.
  • 研究循环C与循环依赖性激酶 (cdks) 的相互作用.
  • 评估环林C/cdk3复合物对pRb酸化在特定部位的影响 (S807/811).

主要成果:

  • 环素C水平在G0退出期间达到峰值,这表明在这个过程中发挥了作用.
  • 一个非cdk8关联的环素C池与cdk3.3形成一个复合体.
  • 这种环林C/cdk3复合物在S807/811中酸化pRb,这对于高效的G0输出至关重要.

更多相关视频

Development of Inhibitors of Protein-protein Interactions through REPLACE: Application to the Design and Development Non-ATP Competitive CDK Inhibitors
10:33

Development of Inhibitors of Protein-protein Interactions through REPLACE: Application to the Design and Development Non-ATP Competitive CDK Inhibitors

Published on: October 26, 2015

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols
12:02

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols

Published on: June 6, 2017

相关实验视频

Last Updated: May 13, 2026

Analysis of Cell Cycle Position in Mammalian Cells
12:19

Analysis of Cell Cycle Position in Mammalian Cells

Published on: January 21, 2012

Development of Inhibitors of Protein-protein Interactions through REPLACE: Application to the Design and Development Non-ATP Competitive CDK Inhibitors
10:33

Development of Inhibitors of Protein-protein Interactions through REPLACE: Application to the Design and Development Non-ATP Competitive CDK Inhibitors

Published on: October 26, 2015

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols
12:02

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols

Published on: June 6, 2017

结论:

  • G0/G1过渡是由一个独特的cyclin/cdk组合调节的,特别是cyclin C/cdk3.
  • 由环林C/cdk3在S807/811处对pRb的酸化是细胞退出G0.0的关键步骤.
  • 这一发现揭示了与G1/S过渡类似的调节机制,但具有不同的cyclin/cdk对.