相关实验视频
Updated: Jul 11, 2025

07:55
Visualization of DNA Repair Proteins Interaction by Immunofluorescence
Published on: June 26, 2020
10.3K
一个多模型研究在DNA完整性检查点中新型PKC异型的作用
Sara Saiz-Baggetto1,2, Laura Dolz-Edo1,2,3, Ester Méndez1,2
1Departament de Bioquímica i Biologia Molecular, Universitat de València, 46100 Burjassot, Spain.
International journal of molecular sciences
|November 14, 2023
概括
蛋白激酶C (PKC) 对于DNA完整性检查点至关重要. 研究人员在小鼠细胞和酵母中使用基因编辑来识别特定的PKC异型,如PKCδ和PKCθ,参与了这种保存的细胞过程.
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 遗传学 是一个
背景情况:
- 蛋白激酶C (PKC) 家族调节重要的细胞过程.
- 从酵母到哺乳动物的DNA完整性检查点激活是保存的.
- 包括酵母中的Pkc1和哺乳动物中的PkCδ在内的PkC异型在这个检查点中涉及.
研究的目的:
- 为了研究PKCδ在非瘤细胞系中DNA完整性检查点激活中的功能.
- 为了比较不同PKC异型在激活DNA完整性检查点中的作用.
- 阐明PKCδ和PKCθ的独特激活机制和基本领域.
主要方法:
- 通过CRISPR-Cas9基因编辑生成PKCδ淘汰赛小鼠胚胎干细胞 (mESCs).
- 使用酵母模型来评估单个PKC异型体的DNA完整性检查点激活.
- 采用PKC异型的截断和突变版本来分析激活机制和域.
主要成果:
- 在mESC中缺少PKCδ导致效应因酶CHK1.1的激活减少.
- 酵母研究表明,与PKCδ相似的PKCθ可以激活DNA完整性检查点,尽管效率较低.
- 发现了PKCδ和PKCθ激活机制和确定PKCδ和PKCθ基本域的差异.
结论:
- PKC异型在DNA完整性检查点路径中发挥着重要作用.
- 这项研究强调了这种机制在物种之间保持的性质.
- 结合不同的模型系统,如mESC和酵母,为复杂的生物途径提供了有价值的见解.
相关概念视频
Long-patch Base Excision Repair
7.0K
Since the discovery of the two BER pathways, there has been a debate about how a cell chooses one pathway over the other and the factors determining this selection. Numerous in vitro experiments have pointed out multiple determinants for the sub-pathway selection. These are:
7.0K
Inhibition of Cdk Activity
4.8K
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...
4.8K
DNA Damage can Stall the Cell Cycle
9.2K
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...
9.2K
S-Cdk Initiates DNA Replication
4.7K
The cell cycle is a series of events leading to DNA duplication followed by the division of cell content to form two daughter cells. The cell cycle progresses in four stages—the cell increases in size (gap 1 or G1-phase), duplicates its DNA (synthesis or S-phase), prepares to divide (gap 2 or G2-phase), and divides (mitosis or M-phase).
Two states at the origin of replication
In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of...
Two states at the origin of replication
In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of...
4.7K
M-Cdk Drives Transition Into Mitosis
5.6K
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...
5.6K
Conservative Site-specific Recombination and Phase Variation
6.0K
Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...
The recognition sites for Cre recombinase called LoxP...
6.0K

