SW15の細胞周期調節は,酵母菌における母細胞特異的なHO転写のために必要である
まとめ
酵母では,SWI5転写因子が交配型切り替えを決定する. SWI5RNAは,特定の細胞サイクル段階の後に母細胞でのみ生成され,子細胞が交配型を切り替えないことを保証します.
科学分野:
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
- 遺伝学 遺伝学とは
背景:
- ハプロイドホモタリック酵母は,非対称な細胞分裂を示します.
- マザー細胞はSTARTフェーズ中にHO遺伝子を一時的に転写し,交配型の切り替えを可能にします.
- 娘細胞はHO遺伝子を転写しないので,交配型を切り替えない.
研究 の 目的:
- SWI5転写因子が母細胞特異的なHO遺伝子転写の唯一の決定因子であるかどうかを調査する.
- 酵母における交配型の切り替えを調節するSWI5の役割を理解するために.
主な方法:
- 酵母細胞サイクル中のSWI5RNAとタンパク質発現の分析.
- SWI5トランスクリプションの実験操作で,交配型スイッチングへの影響を評価する.
主要な成果:
- SWI5 RNAsは,細胞サイクル調節された方法で,特にHO遺伝子の転写ウィンドウの後で生成されます.
- 子細胞におけるSWI5の構成的転写は,その交配型の切り替えにつながります.
- 証拠によると,SWI5遺伝子産物は細胞分裂中に非対称的に分割されている.
結論:
- SWI5は,母細胞特異のHO転写およびその後の交配型切り替えの重要な決定因子です.
- SWI5生成の細胞サイクル調節は,交配型特異性を維持するために不可欠です.
- 細胞分裂中のSWI5の非対称な分割が,この母子細胞の差異の根底にある可能性が高い.
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