腫瘍性転写因子IRF-2による細胞サイクル調節ヒストン遺伝子の活性化
P S Vaughan1, F Aziz, A J van Wijnen
1Department of Cell Biology, University of Massachusetts Medical Center, Worcester 01655, USA.
Nature
|September 28, 1995
まとめ
ヒストンH4遺伝子FO108は,インターフェロン調節因子2 (IRF-2) として識別されたヒストン核因子M (HiNF-M) によって調節されます. このタンパク質は,細胞サイクル進行をDNA複製と結びつけ,細胞の成長に影響を与えます.
科学分野:
- 分子生物学は分子生物学である.
- 細胞サイクル規則 細胞サイクル規則
- 遺伝子発現の表現について
背景:
- 人間のヒストンH4遺伝子FO108は,細胞サイクル依存の転写を示し,S相初期にピークに達する.
- H4ヒストン遺伝子の活性化には,特定のタンパク質因子,ヒストン核因子M (HiNF-M) に結合する細胞サイクル要素 (CCE) が必要です.
研究 の 目的:
- HiNF-Mを浄化し,その分子同一性を特定する.
- ヒストンH4遺伝子転写の調節におけるHiNF-Mの役割とその細胞サイクル進行との関連を解明する.
主な方法:
- タンパク質とDNAの相互作用を研究するために,電泳運動シフトアッセイ (EMSA) が使用されました.
- HiNF-Mの浄化が行われました.
- 再結合インターフェロン調節因子2 (IRF-2) とIRF-1は,CCEへの結合と転写への影響をテストするために使用されました.
主要な成果:
- HiNF-Mは精製され,インターフェロンレギュレータ因子2 (IRF-2) と識別され,インターフェロン反応の既知の負のレギュレータである.
- 再結合IRF-2とIRF-1は,CCEに特異的に結合する.
- IRF-2とIRF-1は,H4ヒストン遺伝子の転写を活性化する.
結論:
- インターフェロン調節因子2 (IRF-2) は,細胞サイクル要素 (CCE) に結合し,ヒストンH4遺伝子転写を活性化するタンパク質因子です.
- IRF-2は,G1/S相移行におけるDNA複製と細胞サイクル進行の結合に機能的な役割を果たしています.
- この発見は,腫瘍発生性で知られているIRF-2を,細胞増殖に関与する重要な遺伝子と結びつけています.
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