对于Fos/Jun蛋白质复合体的序列特定DNA相互作用,Fos中需要两个功能上不同的区域
M Neuberg1, M Schuermann, J B Hunter
1Institut für Molekularbiologie und Tumorforschung, Phillips-Universität Marburg, FRG.
Nature
|April 13, 1989
概括
/复合体与DNA结合,以调节基因转录. 在Fos中的特定区域,包括氨酸拉链和相邻的基本区域,对于这种DNA结合和转录调节至关重要.
科学领域:
- 分子生物学分子生物学
- 基因规则 基因规则
- 蛋白质-DNA相互作用
背景情况:
- 由具有AP1/Jun转录因子的细胞和逆转录病毒Fos蛋白组成的Fos/Jun复合体,与TRE DNA序列结合.
- 这种结合事件对于刺激基因转录至关重要.
研究的目的:
- 为了确定Fos蛋白内特定区域,这些区域对于形成功能Fos/Jun/TRE复合体至关重要.
- 阐明这些区域在蛋白质-蛋白质和蛋白质-DNA相互作用中的作用.
主要方法:
- 位点定向突变发生,在Fos蛋白中引入特定的氨基酸替代物.
- 分析Fos/Jun蛋白质的相关性.
- 评估Fos/Jun/TRE复合体的形成和DNA结合活性.
主要成果:
- 对于Fos/Jun/TRE复合体形成,Fos中需要两个不同的区域:Jun协会的leucine拉链和一个相邻的基本区域.
- 基区域的氨基酸替代破坏了Fos/Jun与TRE DNA的结合,但没有影响Fos/Jun蛋白质的关联.
- 在Fos中的功能关键氨基酸与Jun和GCN4中的DNA结合部位具有结构上的相似性.
结论:
- 的基本区域与氨酸拉链相邻,在调解/复合体的DNA结合中起着至关重要的作用.
- 这个区域与其他DNA结合域的结构相似性突出显示了转录调节中的保存机制.
相关概念视频
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Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
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The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
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Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...


