通过TNF受体2和CD40通过TRAF2-介导的NF-kappa B的激活
1Molecular Biology Department, Tularik, Inc., South San Francisco, CA 94080, USA.
概括
瘤亡因子受体相关因子2 (TRAF2) 调解TNF-R2和CD40通路的信号传递. 过度表达TRAF2会激活NF-kappa B,而TRAF2衍生物会抑制这种激活.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
背景情况:
- 瘤亡因子 (TNF) 受体超级家族成员通过相关蛋白质发出信号.
- TNF受体关联因子 (TRAF) 蛋白质是关键的信号转换器.
- TRAFs将TNF受体与下游信号通路联系起来,包括NF-kappa B激活.
研究的目的:
- 研究TNF-R2和CD40信号传导中的TRAF蛋白的作用.
- 确定哪些TRAF蛋白通过这些受体调解NF-kappa B激活.
主要方法:
- 对TRAF1,TRAF2和TRAF3的过度表达.
- 使用一个缺少RING指域的主导负TRAF2突变.
- 评估NF-kappa B激活的反应TNF-R2和CD40刺激.
主要成果:
- 单独过度表达TRAF2就诱导了NF-kappa B的激活.
- 过度表达TRAF1和TRAF3并没有激活NF-kappa B.
- 一个截断的TRAF2抑制了NF-kappa B激活,这种激活由TNF-R2和CD40介导.
结论:
- TRAF2是TNF-R2和CD40信号通路中的关键和常见的调解器.
- TRAF2的戒指域对其信号功能至关重要.
- 在传输来自TNF-R2和CD40的信号以激活NF-kappa B时,TRAF2起着核心作用.
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