人类环林E,一种与CDC2基因家族的两个成员相互作用的新环林
1Department of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington 98104.
Cell
|September 20, 1991
概括
研究人员发现了一种新的人类循环素,循环素E,它与CDC28蛋白相互作用,调节细胞循环START. 这一发现对于理解人类细胞的G1到S转变至关重要.
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:
- 细胞循环调节对细胞增殖至关重要.
- 循环素和循环素依赖激酶 (CDK) 是细胞循环的关键调节者.
- 了解人类循环素的特定作用对于破译细胞循环控制至关重要.
研究的目的:
- 识别和描述参与细胞循环调节的新型人体循环蛋白.
- 为了研究新发现的环林E在G1到S阶段过渡中的功能.
- 为了确定人体循环素E在细胞循环控制中的相互作用伙伴.
主要方法:
- 在Saccharomyces cerevisiae中补充了三重cln删除,以分离人类环.
- 基因相互作用研究与CDC28基因.
- 在大肠杆菌中表达和净化环林E.
- 使用人体细胞提取物和抗体进行体外结合和激酶试验.
- 免疫沉研究.免疫沉研究.
主要成果:
- 一种新型的人类环素,被指定为环素E,被分离出来.
- 赛克林E证明了与CDC28的遗传相互作用,表明它在START过渡中的作用.
- 两种人类基因,CDC2-HS和CDK2同类基因,被确定为cyclin E.的潜在相互作用体.
- 在人类G1细胞提取物中的重组环林E激活的CDC2蛋白.
- 针对环素E的抗体免疫地从HeLa细胞中降低了组织素H1激酶.
结论:
- 人类环素E在细胞周期的 START 阶段通过与 CDC28.28 相互作用而起作用.
- 环林E与CDC2或CDK2之间的相互作用可能对人类细胞的G1到S相过渡至关重要.
- 循环E是人类细胞循环控制机制的关键组成部分.
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相关概念视频
Positive Regulator Molecules
To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.
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.
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...
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 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...
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...
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 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...
