TRAF6は,インタールイキン-1の信号トランスデューサーです
1Tularik Inc., South San Francisco, California 94080, USA.
Nature
|October 3, 1996
まとめ
研究者らは,核因子カッパB (NF-kappaB) を活性化する新しいTRAFタンパク質家族であるTRAF6を特定した. TRAF6はインタールイウキン-1 (IL-1) 信号伝達に不可欠であり,細胞通信におけるTRAFタンパク質の独特な役割を強調しています.
科学分野:
- 分子生物学は分子生物学である.
- 免疫学 免疫学とは
- 細胞シグナル伝達 細胞信号伝達
背景:
- サイトカインは細胞表面受容体を利用して,転写因子NF-kappaB.B.を活性化させます.
- TRAFタンパク質は,TNF受容体スーパーファミリーによって媒介されるNF-kappaBの活性化に関与しています.
研究 の 目的:
- TRAFタンパク質ファミリーの新規メンバーを特定し,特徴づけること.
- サイトカインシグナル伝達経路,特にIL-1およびTNFシグナル伝達におけるTRAF6の役割を明らかにする.
主な方法:
- 人間の細胞におけるTRAF6の過剰発現 293
- 主要負のTRAF6変異体を使用して,信号伝達経路を阻害する.
- IL-1刺激後の共免疫プレシピテーションアッセイを用いたタンパク質-タンパク質相互作用の調査.
主要な成果:
- 過剰発現したTRAF6はNF-kappaB.を活性化する.
- 支配的な陰性TRAF6変異体は,特にIL-1-誘発のNF-kappaB活性化を抑制するが,TNF誘発の活性化を抑制しない.
- IL-1治療は,IL-1受容体に徴募されたキナーゼであるIRAKとTRAF6の関連につながります.
結論:
- TRAF6は,NF-kappaBの活性化に役割を果たす,新たに特定されたTRAFファミリーのメンバーです.
- TRAF6は,IL-1信号伝達経路における重要な信号変換器である.
- TRAFタンパク質は,異なる受容体ファミリーの異なる信号トランスデューサとして作用する可能性があります.
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