Cdc14フォスファテーゼはrDNA凝縮を誘導し,芽生える酵母アナフェーズ中にコヘシン独立の凝結を解消する
Matt Sullivan1, Toru Higuchi, Vittorio L Katis
1Chromosome Segregation Laboratory, Cancer Research UK London Research Institute, Lincoln's Inn Fields Laboratories, 44 Lincoln's Inn Fields, London WC2A 3PX, United Kingdom.
Cell
|May 13, 2004
まとめ
芽生えた酵母における早期のコヘシン破壊は染色体分離を可能にしますが,rDNAロカスには,絡み合いを解消し,適切な分離のために凝縮するために,フォスファタゼCdc14が必要です.
科学分野:
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- 染色体分離は細胞分裂に不可欠である.
- プロテアゼセパレアゼはコヘシンを割って分離を開始します.
- 染色体XIIのrDNAロキュスは,独特の分離の課題を提示しています.
研究 の 目的:
- rDNA分離におけるコヘシン破壊とCdc14の役割を調査する.
- 絡み合ったrDNAの解像を制御するメカニズムを理解する.
- 細胞サイクルの中でrDNA分離がどのように一時的に順序付けられているかを決定する.
主な方法:
- 芽生える酵母モデルシステム.
- コヘシンとコンデンシン複合体の機能の分析.
- セパラーゼとCdc14フォスファターゼの活動を調査する.
- 染色体凝縮と分離を評価するための顕微鏡検査と遺伝子検査.
主要な成果:
- メタフェーズにおけるコヘシン破壊は,完全なrDNA分離には不十分である.
- rDNAローカスは,メタフェーズにおいて,凝縮されず,絡み合っているままである.
- セパラーゼによって活性化されるCdc14は,コンデンシンとオーロラBキナーゼによるrDNA凝縮を促進する.
- Cdc14はまた,凝縮から独立してコヘシン独立のrDNA結合も解消します.
結論:
- Cdc14は,rDNA分離を保証する二重の役割を果たしています.
- Cdc14による凝縮と結合解消は,rDNAの絡み合いを解消するために不可欠です.
- Cdc14媒介のプロセスは,アナフェーズ発症時にrDNA分離の時間順序を確立する.
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