TNF受容体2とCD402によるTRAF2媒介のNF-kappa Bの活性化
1Molecular Biology Department, Tularik, Inc., South San Francisco, CA 94080, USA.
まとめ
腫瘍死滅因子受容体関連因子2 (TRAF2) は,TNF-R2とCD40経路の信号伝達を媒介する. TRAF2の過剰発現はNF-kappa Bを活性化させ,TRAF2の誘導体はこの活性化を抑制する.
科学分野:
- 免疫学 免疫学とは
- 分子生物学は分子生物学である.
- 細胞シグナリング 細胞シグナリング
背景:
- 腫瘍死滅因子 (TNF) 受容体スーパーファミリーのメンバーは,関連するタンパク質を通して信号を発信します.
- TNF受容体関連因子 (TRAF) タンパク質は,重要な信号変換器である.
- TRAFは,NF-カッパBの活性化を含む下流信号伝達経路にTNF受容体を結びつける.
研究 の 目的:
- TNF-R2およびCD40信号伝達におけるTRAFタンパク質の役割を調査する.
- どのTRAFタンパク質がこれらの受容体を通してNF-kappa Bの活性化を媒介するかを決定する.
主な方法:
- TRAF1,TRAF2,TRAF3.3を過剰に表現している.
- リング指ドメインが欠けている支配的陰性TRAF2変異体を使用しています.
- TNF-R2およびCD40刺激に対する反応としてNF-kappa B活性化の評価.
主要な成果:
- TRAF2過剰発現は単独でNF-カッパBの活性化を誘発した.
- TRAF1およびTRAF3の過剰発現はNF-カッパBを活性化しなかった.
- TNF-R2とCD40の両方によって媒介されたNF-kappa Bの活性化を阻害したTUNCED TRAF2.
結論:
- TRAF2は,TNF-R2とCD40のシグナル伝達経路における重要かつ一般的なメディエーターである.
- TRAF2のRING finger領域は,そのシグナリング機能に不可欠である.
- TRAF2は,NF-kappa Bを活性化するためにTNF-R2とCD40から信号を送信する中心的な役割を果たしています.
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