通过细胞特异性抑制剂与调节域delta的相互作用来控制c-Jun活性:v-和c-Jun之间的差异
1Howard Hughes Medical Institute, University of California, Berkeley 94720.
Cell
|November 16, 1990
概括
细胞抑制剂通过A1域负面调节c-Jun转录活性,而三角形域则调节这种抑制. 这就解释了为什么v-Jun缺乏delta,是比c-Jun更强的激活剂.
科学领域:
- 分子生物学分子生物学
- 基因规则 基因规则
- 细胞信号传输 细胞信号传输
背景情况:
- c-Jun是一种转录因子,参与各种细胞过程.
- c-Jun的转录活动可以通过调节域进行调节.
- 在c-Jun及其病毒对应物v-Jun之间存在转录性质的差异.
研究的目的:
- 为了研究c-Jun.的转录激活特性.
- 确定控制c-Jun活体活动的监管机制.
- 阐明三角形域在c-Jun调节中的作用.
主要方法:
- 在不同细胞系中分析c-Jun嵌合体.
- 在体外转录试验中,使用仿真Jun蛋白和细胞提取物进行了转录试验.
- 研究调节领域和细胞抑制剂之间的相互作用.
主要成果:
- c-Jun 具有被细胞类型特异性抑制剂负调节的激活器域 (A1).
- c-Jun的三角域促进了抑制剂和A1.1之间的相互作用.
- 由于缺乏三角域,v-Jun表现出更强的转录激活,这是由于抑制减少.
- A1和delta域都受到细胞类型特定的抑制.
结论:
- 一个特定的细胞因子负面调节c-Jun活动.
- 三角域在调解细胞类型特定的c-Jun.抑制中发挥着至关重要的作用.
- 这些发现为c-Jun和v-Jun的独特转录行为提供了分子解释.
更多相关视频
08:49Identification of Mediators of T-cell Receptor Signaling via the Screening of Chemical Inhibitor Libraries
Published on: January 22, 2019
13:47Lentiviral Vector Platform for the Efficient Delivery of Epigenome-editing Tools into Human Induced Pluripotent Stem Cell-derived Disease Models
Published on: March 29, 2019
相关概念视频
Negative Regulator Molecules
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.
Regulated Protein Degradation
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Eukaryotic Transcription Inhibitors
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
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...
Regulated Protein Degradation
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
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...
