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相关概念视频

Inhibition of Cdk Activity02:34

Inhibition of Cdk Activity

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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...
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Negative Regulator Molecules01:23

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Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
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The Cell Cycle Control System01:28

The Cell Cycle Control System

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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.
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In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
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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.
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A cell line is a population of cells grown in vitro that can be subcultured over several generations. Normal cells cease to divide after a certain number of cell divisions, a process known as replicative senescence. This number, called the Hayflick limit, was conceptualized by Leonard Hayflick in 1961 when he observed that fetal cells grown in culture could only divide 40-60 times. This limit is due to the shortening of the telomeres during each round of cell division, preventing cell division...
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相关实验视频

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Analysis of Cell Cycle Position in Mammalian Cells
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细胞周期特异性蛋白酸酶1 (PP1) 基质鉴定使用转基因细胞系进行鉴定.

Dorothee C Kommer1, Konstantinos Stamatiou1, Paola Vagnarelli2

  • 1College of Health, Medicine and Life Science, Brunel University London, London, UK.

Methods in molecular biology (Clifton, N.J.)
|February 23, 2024
PubMed
概括

这项研究引入了一种新的CRISPR-Cas9方法,用于在细胞周期期间识别蛋白酸酶1 (PP1) 基质. 通过标记调控子单元,研究人员可以精确确定具有细胞周期特异性的PP1目标.

关键词:
在AID退化系统的退化系统.生物化系统APEX2生物化系统这就是CRISPR-Cas9的特征.质谱测量质量谱测量酸蛋白组学 酸蛋白组学 酸蛋白组学蛋白酸酶1 (PP1) 是一种蛋白质酸酶.同步的同步是同步的同步.

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相关实验视频

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Analysis of Cell Cycle Position in Mammalian Cells
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科学领域:

  • 分子生物学分子生物学
  • 细胞生物学 细胞生物学
  • 生物化学 生物化学

背景情况:

  • 鉴定蛋白酸酶1 (PP1) 全酶基质是具有挑战性的,因为不同的调节子单元和细胞循环调节.
  • 现有的方法缺乏细胞周期特异性,用于PP1基质的识别.

研究的目的:

  • 开发一种新的策略,用于在整个细胞周期中研究PP1基质.
  • 为了生成具有内源标记PP1调控子单元 (RIPPOs) 的细胞系,用于基质识别.

主要方法:

  • 使用CRISPR-Cas9基因组编辑来标记RIPPOs与辅酶诱导降解剂 (AID) 或酸盐过氧化酶2 (APEX2) 模块.
  • 采用基于SILAC蛋白质基的方法,包括用APEX2进行近距离标记的质谱 (MS) 和通过AID降解RIPPO后的SILAC光MS.
  • 在近距离标记和差异酸化蛋白质之间进行了体重叠分析,以确定假定的PP1基质.

主要成果:

  • 通过使用CRISPR-Cas9.9成功生成了具有内源标记RIPPO的细胞系.
  • 建立了一种工作流程,将近距离标记和可降解蛋白质策略结合起来,用于基质识别.
  • 通过蛋白质基因数据集的重叠来丰富的确定的假定PP1基质.

结论:

  • 提出的策略可以研究具有细胞周期特异性的PP1基质.
  • 这种方法为了解PP1在动态细胞过程中的功能提供了一个强大的工具.
  • 建议使用FRET,PLA和体外试验等方法进行进一步的验证.