概括
cdc2+蛋白控制了分裂酵母细胞分裂的时间. 其通过酸化调节的活性在细胞进入静止阶段时降低,影响细胞周期的结束.
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:
- cdc2+基因对于调节细胞循环的承诺和分裂酵母中线粒分裂的时间至关重要.
- 了解控制细胞循环进展的分子机制在细胞生物学中至关重要.
研究的目的:
- 描述cdc2+蛋白质的特征,包括其生物化学特性及其在细胞循环调节中的作用.
- 为了研究cdc2+蛋白在细胞周期的不同阶段,特别是进入静止阶段时,其活性如何变化.
主要方法:
- 通过合成来产生针对cdc2+蛋白的抗体.
- 分析了蛋白质的分子量,酸化状态和蛋白质激酶活性.
- 在整个细胞周期中,在增殖和非增殖细胞中,对蛋白质水平和酸化的变化进行了监测.
主要成果:
- 鉴定出cdc2+蛋白是一种34kDa的蛋白,具有蛋白激酶活性.
- 在快速生长的细胞的线粒循环期间,cdc2+蛋白水平和酸化保持不变.
- 在G1阶段的增殖和捕获停止后,cdc2+蛋白变得脱,失去了其激酶活性.
结论:
- 通过其酸化状态的变化调节cdc2+蛋白激酶活性,有助于控制从线粒循环的退出和进入静止阶段.
- cdc2+的酸化状态是细胞循环进展和裂变酵母静止的一个关键调节机制.
相关概念视频
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...
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...
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...
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...
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...
Molecular Factors Affecting Cell Division
Several external and internal factors influence the initiation and inhibition of cell division. For instance, the death of nearby cells or the release of human growth hormone (hGH) promotes cell division. In contrast, lack of hGH or crowding of cells can inhibit cell division.
Several proteins function as internal regulators to ensure each cell cycle stage is completed faithfully before proceeding to the next. Regulator molecules may act directly or influence the activity or production of other...
Several proteins function as internal regulators to ensure each cell cycle stage is completed faithfully before proceeding to the next. Regulator molecules may act directly or influence the activity or production of other...


