cdc2 链接了多索菲拉细胞周期和不对称的分裂机制
Nature
|March 10, 2001
概括
细胞循环调节器cdc2对于Drosophila中不对称的神经前体分裂至关重要. 减弱cdc2功能会破坏关键蛋白质的局部化和兄弟细胞命运的决定.
科学领域:
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
- 遗传学 是一个遗传学.
背景情况:
- 不对称的细胞分裂依赖于分离细胞酸盐的决定因素.
- 在Drosophila神经原始体中,像Inscuteable这样的尖端蛋白质可以直接定位螺旋的方向和决定性定位.
研究的目的:
- 为了研究细胞循环组件在不对称的神经祖先分裂中的作用.
- 为了确定细胞循环调节者是否参与不对称的细胞分裂.
主要方法:
- 在Drosophila中减弱细胞循环调节器cdc2的功能.
- 观察对不对称成分定位和兄弟细胞命运的影响.
主要成果:
- 神经前体的不对称划分需要cdc2功能.
- 降低cdc2功能会在线粒分裂过程中损害顶端蛋白的不对称局部化.
- 缺陷的cdc2功能导致无法解决不同的兄弟细胞命运.
结论:
- 需要Cdc2/B型环林复合体来维持在线粒分裂期间不对称的顶端组件局部化.
- Cdc2在不对称的细胞分裂中起着至关重要的作用,将细胞循环调节与细胞酸盐决定联系起来.
相关概念视频
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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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The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
The Cell Cycle Control System
The cell cycle is an organized set of events that leads the cell to divide into two daughter cells, each containing chromosomes identical to the parent cell. It is the cell cycle that leads to the formation of an entire organism from a single-cell zygote. Besides, cell division also functions in the renewal or repair of tissues in adult multicellular eukaryotes. For example, in the bone marrow, the stem cells divide to form new blood cells. Although essential for several functions, cell...
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...
The Cell Cycle Control System
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.
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...


