マクロファージとB細胞特異の転写因子PU.1は,ETSの腫瘍遺伝子と関連しています
M J Klemsz1, S R McKercher, A Celada
1Cancer Research Center, La Jolla Cancer Research Foundation, California 92037.
Cell
|April 6, 1990
まとめ
研究者らは,マクロファージとB細胞の遺伝子調節に不可欠な新しいDNA結合タンパク質PU.1を特定した. 転写活性化剤であるこのタンパク質は,ETS腫瘍遺伝子の家族と類似性を共有しています.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- 細胞生物学 細胞生物学
背景:
- 組織特異のDNA結合タンパク質は,遺伝子発現を調節する上で重要な役割を果たします.
- これらのタンパク質を理解することは,細胞の分化と機能を解読する鍵です.
研究 の 目的:
- 遺伝子調節に関与する新しいDNA結合タンパク質を分離し,特徴づけること.
- 特定されたタンパク質のDNA結合配列と機能特性を決定する.
主な方法:
- PU.1タンパク質をコードするcDNAクローンの分離.
- DNA結合部位を特定するためにメチル化干渉とDNase 1保護アッセイ.
- タンパク質ドメインの分析とシーケンスホモロジー.
主要な成果:
- 新しい組織特異のDNA結合タンパク質,PU.1が分離されました.
- PU.1は,ピューリンに富んだ配列5'-GAGGAA-3' (PUボックス) を認識する.
- PU.1は,マクロファージとB細胞の転写活性化剤として機能し,そのDNA結合ドメインはカルボキシ末端領域に位置しています.
結論:
- PU.1は,マクロファージとB細胞の機能に不可欠な新しい転写活性化剤です.
- PU.1のDNA結合ドメインは,ETS腫瘍遺伝子の家族と同一性を示し,保存された規制メカニズムを示唆しています.
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