リボソームタンパク質S3:選択的な遺伝子調節を媒介するNF-kappaB複合体のKHドメインサブユニット
Fengyi Wan1, D Eric Anderson, Robert A Barnitz
1Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA.
Cell
|November 30, 2007
まとめ
研究者らは,リボソームタンパク質S3 (RPS3) をNF-kappaBタンパク質複合体の新しいサブユニットとして発見しました. RPS3はDNA結合を促進し,NF-kappaBBに不可欠である.
科学分野:
- 分子生物学は分子生物学である.
- セルラー・シグナリング
- プロテオミクス プロテオミクスは,プロテオミクスの
背景:
- 核因子-kappaB (NF-kappaB) は,重要な転写因子複合体である.
- NF-kappaBは,様々な細胞信号に反応して遺伝子発現を調節する.
- NF-kappaBの選択的な遺伝子ターゲティングを理解することは,細胞活性化に不可欠です.
研究 の 目的:
- NF-kappaB p65複合体の新しいサブユニットを特定するために.
- NF-kappaB機能における特定されたサブユニットの役割を明らかにする.
- NF-kappaBの好ましい遺伝子募集のメカニズムを理解するために.
主な方法:
- 質量スペクトロメトリー (TAP-MS) と組み合わせたタンデム親和性浄化が採用されました.
- NF-kappaB p65は,プロテオミックスクリーニングの餌として使用されました.
- 特定されたタンパク質の機能を評価するために,ノックダウン実験を行った.
主要な成果:
- リボソームタンパク質S3 (RPS3) は,NF-kappaB p65複合体の新しい非Relサブユニットとして特定されました.
- RPS3は,NF-kappaB.のDNA結合活動を相乗的に強化する.
- RPS3のノックダウンは,核シャトルまたはグローバルトランスレーションに影響を与えることなく,標的遺伝子のNF-kappaB媒介トランスクリプションを特異的に低下させた.
結論:
- RPS3は,NF-kappaBの不可欠な,以前は認識されなかったサブユニットです.
- RPS3は,急速な細胞活性化中に特定の遺伝子の調節に重要な役割を果たします.
- この発見は,NF-kappaB.B.による選択的遺伝子発現制御の洞察を提供している.
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