ヒトヒストンH2b遺伝子の細胞サイクル発現を調節する転写因子であるOTF-1の浄化と特徴付け
C Fletcher1, N Heintz, R G Roeder
1Laboratory of Biochemistry and Molecular Biology, Rockefeller University, New York, New York 10021.
Cell
|December 4, 1987
まとめ
研究者らはヒトヒストンH2b遺伝子転写に不可欠なオクターマー結合転写因子1 (OTF-1) を精製した. この要素は,この因子です.
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:
- ヒストンH2bの遺伝子転写は,DNA複製と細胞分裂に不可欠です.
- オクタマー結合転写因子は,遺伝子発現の調節に重要な役割を果たします.
- ヒストン遺伝子転写を制御する特定の要因を理解することは,細胞サイクル研究にとって不可欠です.
研究 の 目的:
- ヒトヒストンH2b遺伝子転写を刺激するオクターマー結合転写因子 (OTF-1) を浄化し特徴づけること.
- 精製されたOTF-1のアイデンティティと機能的活性を in vitroで確認する.
- ヒストンH2b遺伝子発現に関連したOTF-1の細胞サイクル特異的活性を調べる.
主な方法:
- DNA親近性染色法を使用して,HeLa核抽出物からOTF-1の浄化.
- SDS-ポリアクリラミドゲル電泳と活性再自然化による浄化された因子の特定.
- 復元された in vitro システムでの H2b 遺伝子転写刺激の測定.
主要な成果:
- ヒトヒストンH2b遺伝子転写を刺激するOTF-1として知られる転写因子を成功裏に浄化しました.
- 精製されたOTF-1は,オクターマー要素に依存するH2b転写の効率的な刺激をインビトロで実証しました.
- OTF-1活性はS相核抽出物では検出されたが,G2相核抽出物では検出されなかった.
結論:
- この研究では,本物のH2b転写制御因子OTF-1を成功裏に浄化しました.
- OTF-1はヒトヒストンH2b遺伝子発現の主要な調節体であり,S相特異的な活性を持っています.
- これらの発見は,細胞周期調節遺伝子転写の分子機構の洞察を提供します.
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