在IL-2和IF中,Nmi与Stat5和Stat1在玛介导信号传输中的功能关联
1Laboratory of Molecular Immunology, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892-1674, USA.
Cell
|February 16, 1999
概括
核受体相互作用蛋白 (Nmi) 通过增强协活性剂蛋白招募来增强STAT介导的转录. 这种蛋白质在对IL-2和IFNgamma细胞因子的反应中强化转录.
科学领域:
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
- 蛋白相互作用 蛋白相互作用
背景情况:
- 信号转换器和转录激活器 (STAT) 蛋白质是细胞因子信号传递的关键媒介.
- 核受体相互作用蛋白 (Nmi) 的功能在很大程度上是未知的.
- 此前,Nmi已经被确定为一个N-Myc交互器.
研究的目的:
- 为了识别新的STAT相互作用蛋白.
- 研究Nmi在STAT介导的转录调节中的作用.
- 阐明Nmi影响STAT活动的机制.
主要方法:
- 用Stat5b的卷轴-卷轴区域作为诱进行酵母双混合选.
- 同免疫沉降测定以确认蛋白质相互作用.
- 记者基因测试测量转录活性,以响应IL-2和IFNgamma等细胞因子.
主要成果:
- Nmi被确定为一个与Stat5b相互作用的蛋白质.
- Nmi 与多个STAT蛋白相互作用,不包括Stat2.
- Nmi增强了IL-2和IFGamma诱导的STAT介导的转录.
- Nmi增强了CBP/p300联合激活者的招募到Stat1和Stat5.
结论:
- Nmi作为STAT依赖转录的积极调节者.
- 通过促进STAT与CBP/p300等联合激活蛋白的关联,Nmi的功能.
- 在增强协活性剂招募中的Nmi的作用强调了其在细胞因子信号通路中的重要性.
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