一个模型,通过循环素和MPF水平调整线粒钟
1Department of Applied Mathematics and Computer Science, Weizmann Institute of Science, Israel.
Science (New York, N.Y.)
|March 1, 1991
概括
本研究提出了细胞周期进展的数学模型,解释了成熟促进因子 (MPF) 和循环动态如何产生多个细胞周期. 它建议进行实验来验证MPF.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 数学建模的数学建模
背景情况:
- 细胞循环的进展是细胞分裂和生物体发育的基础.
- 了解细胞循环的调节机制,特别是涉及成熟促进因子 (MPF) 和循环素,至关重要.
- 之前的模型没有完全整合最近关于MPF-环林相互作用的生物化学数据.
研究的目的:
- 开发细胞循环进展的数学模型,结合最近的生物化学见解.
- 解释早期胚胎细胞周期中观察到的MPF活动的动态.
- 阐明如何通过MPF和环林度调节内部细胞周期时钟.
主要方法:
- 开发一种新的数学模型,整合MPF和cyclin的生化相互作用.
- 基于集成模型的细胞周期动态的模拟.
- 对模型参数的分析,以了解周期持续时间和数量的调节.
主要成果:
- 该模型成功地复制了在早期胚胎中观察到的MPF活动动态.
- 它展示了MPF活动的多个周期是如何从特定的生化相互作用中产生的.
- 该模型表明,调节MPF或环林度变化速率调整了内部细胞周期时钟.
结论:
- 提出的数学模型为了解细胞循环控制提供了一个强大的框架.
- MPF活动在确定细胞周期的持续时间和数量方面发挥着关键作用.
- 该研究建议进行特定的实验,以验证模型对MPF在体细胞周期长度中的作用的预测.
更多相关视频
12:02Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols
Published on: June 6, 2017
08:33Combining Mitotic Cell Synchronization and High Resolution Confocal Microscopy to Study the Role of Multifunctional Cell Cycle Proteins During Mitosis
Published on: December 5, 2017
相关概念视频
01:45Positive Regulator Molecules
To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.
02:39Positive 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.
02:15M-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...
02:15M-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...
01:28The 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...
01:27Molecular 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...