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相关概念视频

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...
Anaphase Promoting Complex00:50

Anaphase Promoting Complex

The stepwise destruction of specific proteins is necessary for the progression and completion of the cell cycle. Such proteins are ubiquitinated by ubiquitin ligases and then subsequently destroyed by the proteasome. The SCF (Skp1/Cullin/F-box) and the anaphase-promoting complex (APC) are two important ubiquitin ligases involved in cell cycle progression. While SCF is active throughout the cell cycle, APC gets activated during metaphase to anaphase transition. Cdc20 or Cdh1 binds to APC and...
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...
Anaphase Promoting Complex00:50

Anaphase Promoting Complex

The stepwise destruction of specific proteins is necessary for the progression and completion of the cell cycle. Such proteins are ubiquitinated by ubiquitin ligases and then subsequently destroyed by the proteasome. The SCF (Skp1/Cullin/F-box) and the anaphase-promoting complex (APC) are two important ubiquitin ligases involved in cell cycle progression. While SCF is active throughout the cell cycle, APC gets activated during metaphase to anaphase transition. Cdc20 or Cdh1 binds to APC and...

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相关实验视频

Updated: Jun 27, 2026

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

Xpd/Ercc2调节CAK活动和线粒细胞的进展.

Jian Chen1, Stéphane Larochelle, Xiaoming Li

  • 1Present address: Cell Biology Program, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA.

Nature
|July 11, 2003
PubMed
概括

多菌TFIIH成分Xpd负面调节Cdk7激酶活性,影响细胞循环的进展. 在线粒分裂时的Xpd下调增强了Cdk7的细胞分裂活性,并沉默了转录.

科学领域:

  • 细胞生物学 细胞生物学
  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.

背景情况:

  • 一般转录因子IIH (TFIIH) 是一个多子单元复合体,对转录和DNA修复至关重要.
  • TFIIH含有Cdk激活激酶 (CAK) 亚复合体,包括Cdk7,环林H和MAT1,可激活环林依赖激酶 (Cdks).
  • 作为TFIIH的激酶子单元,Cdk7酸化RNA聚合酶II和其他Cdk,调节转录和细胞循环进展.

研究的目的:

  • 调查TFIIH组件Xpd在调节Cdk7/CAK活动中的作用.
  • 确定Xpd如何影响细胞周期进展和线粒体事件.
  • 阐明Xpd,CAK活动和转录调节在线粒分裂过程中的相互作用.

主要方法:

  • 利用Drosophila作为一个模型生物.
  • 操纵Xpd水平以观察对Cdk7/CAK活性的影响.
  • 评估了Cdk T-环酸化,线性进展,细胞增殖和转录活性.

主要成果:

  • 过多的Xpd提升了CAK活性,导致Cdk T-循环酸化,线粒细胞缺陷和致死性降低.
  • 降低Xpd水平可以增强CAK活性,促进细胞增殖.
  • 在线粒分裂开始时,Xpd被下调,这与高Cdk1活性相吻合.

更多相关视频

Combining Mitotic Cell Synchronization and High Resolution Confocal Microscopy to Study the Role of Multifunctional Cell Cycle Proteins During Mitosis
08:33

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

Published on: December 5, 2017

A Non-random Mouse Model for Pharmacological Reactivation of Mecp2 on the Inactive X Chromosome
08:27

A Non-random Mouse Model for Pharmacological Reactivation of Mecp2 on the Inactive X Chromosome

Published on: May 22, 2019

相关实验视频

Last Updated: Jun 27, 2026

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

Combining Mitotic Cell Synchronization and High Resolution Confocal Microscopy to Study the Role of Multifunctional Cell Cycle Proteins During Mitosis
08:33

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

Published on: December 5, 2017

A Non-random Mouse Model for Pharmacological Reactivation of Mecp2 on the Inactive X Chromosome
08:27

A Non-random Mouse Model for Pharmacological Reactivation of Mecp2 on the Inactive X Chromosome

Published on: May 22, 2019

结论:

  • 果 Xpd 负面调节 Cdk7/CAK 活性,从而控制细胞循环的进展.
  • 在线粒分裂过程中Xpd的下调调节可以调节CAK的活性,从而促进线粒分裂的进展.
  • 线粒体对Xpd的下调是抑制细胞分裂期间基底转录的关键机制.