転写を抑制するヒトDNA結合因子の分子クローニングと特徴付け
1Laboratory of Molecular Biology, National Institutes of Health, Bethesda, Maryland 20892.
Cell
|December 1, 1989
まとめ
研究者は,GC豊富なDNA配列を結合するヒトの転写因子を特定しました. この因子,91kdのタンパク質は,表皮成長因子受容体 (EGFR) とβ-アクチンを含むプロモーターからの遺伝子発現を抑制する.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝子規制 遺伝子規制
- バイオケミストリー バイオケミストリー
背景:
- GC豊富な配列を結合する転写因子は,家政の遺伝子や腫瘍遺伝子を調節する.
- GCが豊富な元素は,EGFR,β-アクチン,CANPのような重要な遺伝子のプロモーターに不可欠です.
研究 の 目的:
- GC豊富なプロモーター配列を結合する因子をコードするヒトのcDNAをクローンし,特徴づけること.
- この新しい因子のDNA結合領域と転写制御機能を調査する.
主な方法:
- 人間のcDNAのクローニング.
- 削除分析のためのタンパク質断片の細菌表現.
- CV1細胞におけるレポーター遺伝子の測定は,プロモーターの活動を評価するために行われます.
- 細胞フリートランスクリプション抽出物は,規制効果を研究するために.
主要な成果:
- 基本的なDNA結合ドメインを持つ91kdタンパク質をコードするcDNAが分離されました.
- クローンファクターはEGFR,β-アクチン,CANPプロモーターのGC豊富な配列に結合する.
- これらのプロモーターからの転写を抑制する因子の発現は,細胞および細胞のないシステムで抑制されます.
結論:
- GC豊富な配列を結合し,遺伝子発現を抑制する新しいヒト転写因子が特定されました.
- この発見は,ポジティブな要因とネガティブな要因の両方が同じ制御要素と相互作用する複雑な規制メカニズムを示唆しています.
- 共有された要素における多様な転写因子の相互作用は,転写調節の複雑な多様性に寄与する.
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