細胞サイクルを調節するSWI6の中心的な役割 酵母におけるスタート特異的転写
Nature
|June 11, 1992
まとめ
イーストでは,Swi6タンパク質は細胞サイクル調節遺伝子転写に不可欠です. それは,2つの異なる転写因子,MBFとSBFの規制サブユニットとして作用し,DNA複製遺伝子を制御します.
科学分野:
- 分子生物学は分子生物学である.
- イースト遺伝学 イースト遺伝学
- 細胞サイクル規制について
背景:
- Saccharomyces cerevisiaeのDNA複製遺伝子は,G1期後半に一時的に転写される.
- これらの遺伝子のプロモーターには,MluI細胞サイクルボックス (MCB) を含む保存モチーフが含まれています.
- MCBは,TMP1やPOL1.1のような細胞サイクル特異的な遺伝子転写に不可欠です.
研究 の 目的:
- タンパク質成分とMCBに結合する転写因子の調節を調査する.
- 細胞サイクル依存遺伝子発現におけるSwi6タンパク質の役割を明らかにする.
主な方法:
- TMP1 MCBを使用したインビトロ複合形成アッセイ.
- 生物化学分析によるタンパク質成分の特定.
- Swi6.6がない場合の細胞周期調節の分析
主要な成果:
- Swi6と新しい12万MWのタンパク質 (p120) を含むMCBの複合体の形成 in vitro.
- Swi6は,SCBとMCBの両方によって駆動される転写の正しい細胞サイクル調節に不可欠です.
- 2つの異なる転写因子を特定した:SCBを結合するSBF (Swi4/Swi6) と,MCBを結合するMBF (p120/Swi6).
結論:
- Swi6は,細胞サイクル進行を制御する複数の転写因子の重要な規制サブユニットです.
- この研究では,酵母DNA複製遺伝子調節におけるMBFとSBFの組成と機能を定義しています.
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