同じ誘導性核タンパク質は,インターリューキン-2受容体アルファ遺伝子と1型HIVの両方のミトゲン活性化を調節する
E Böhnlein1, J W Lowenthal, M Siekevitz
1Howard Hughes Medical Institute, Department of Medicine, Duke University Medical Center, Durham, North Carolina 27710.
Cell
|June 3, 1988
まとめ
HIVEN86Aという新たに特定されたタンパク質は,HIV-1 LTRとインタールイキン-2受容体α (IL-2Rα) 遺伝子の両方に結合します. この相互作用は,T細胞の活性化とウイルスの遺伝子転写に極めて重要です.
科学分野:
- 分子生物学は分子生物学である.
- ウイルス学 ウイルス学 ウイルス学
- 免疫学 免疫学とは
背景:
- インターレウキン-2受容体-アルファ (IL-2Rα) 遺伝子とヒト免疫不全ウイルス1型 (HIV-1) の長期末端リピート (LTR) は,どちらもT細胞ミトゲンによって活性化されます.
- この共同活性化の基礎となる規制メカニズムの理解は,基礎科学と治療開発の両方にとって重要である.
研究 の 目的:
- IL-2Rアルファ遺伝子とHIV-1LTRのミトゲン誘発活性化に関与する核タンパク質を特定し,特徴づけること.
- この2つの遺伝子要素の共同活性化を媒介する分子相互作用を解明する.
主な方法:
- 核タンパク質の抽出と浄化.
- 特定のDNAとタンパク質の結合を検出するための電泳運動シフトアッセイ (EMSA)
- レポーター遺伝子アッセイを用いた遺伝子プロモーター活動の分析.
主要な成果:
- HIVEN86Aと名付けられた誘導可能な86 kDaの核タンパク質が特定されました.
- HIVEN86Aは,HIV-1 LTRの強化要素と,IL-2Rアルファ遺伝子プロモーターの関連する配列に特異的に結合する.
- IL-2Rアルファプロモーターの結合部位と個々のHIV-1エンハンサー要素の両方が,異種プロモーターにミトゲン誘導性を授与することができます.
結論:
- HIVEN86Aは,IL-2Rアルファ遺伝子とHIV-1LTRの両方のT細胞ミトゲン誘発活性化に重要な役割を果たしています.
- HIV-1プロウイルスは,HIVEN86Aのような細胞転写因子の正常な機能を妨害し,ウイルスの遺伝子発現を強化するようです.
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