酵母細胞サイクル転写因子SBFとMBFのゲノム結合部位
V R Iyer1, C E Horak, C S Scafe
1Department of Biochemistry, Stanford University Medical Center, California 94305, USA.
Nature
|February 24, 2001
まとめ
この研究は,酵母菌におけるSwi4-Swi6 (SBF) とMbp1-Swi6 (MBF) の転写因子の新しいゲノム結合部位を特定しています. これらの要因は,SBFが芽生えと生物合成を制御し,MBFがDNA複製と修復を管理する,異なる細胞過程を調節する.
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:
- ゲノムDNAと相互作用するタンパク質は,ゲノム機能にとって極めて重要です.
- 配列特異の転写因子SBFとMBFは,酵母細胞のG1/S細胞サイクル移行中に遺伝子発現を調節する.
- SBFはSwi4-Swi6ヘテロダイマーであり,MBFはMbp1-Swi6ヘテロダイマーであり,Swi4とMbp1がDNA結合成分である.
研究 の 目的:
- SBFとMBFの転写因子のインビボゲノム結合部位を特定する.
- SBFとMBFの標的遺伝子の機能を特徴付ける.
- 細胞プロセスを調節するSBFとMBFの機能的専門性を理解する.
主な方法:
- DNAマイクロアレイを用いて,SBFとMBFのゲノム結合部位を vivo でマッピングしました.
- 特定された標的遺伝子の機能を分析した.
主要な成果:
- 以前から知られている標的に加えて,SBFとMBFのための約200の新しい推定標的遺伝子を特定しました.
- SBFで活性化された遺伝子は,主に芽生え,膜,細胞壁のバイオシンセシスに関与していることを発見しました.
- MBFで活性化された遺伝子は,主にDNA複製と修復と関連していることが判明しました.
結論:
- この研究は,SBFとMBFの転写因子のゲノム結合環境を定義しています.
- 結果は,SBFとMBFの間の機能的な専門化を示し,細胞過程の調節における明確な役割を持っています.
- この特化により,ミトスの細胞サイクル中の同期された分子イベントの独立した調節が可能になるかもしれない.
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