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イーストの複製における複合体の組み立ての2つのステップは, in vivo で発生します
J F Diffley1, J H Cocker, S J Dowell
1Imperial Cancer Research Fund, Clare Hall Laboratories, South Mimms, Hertfordshire, England.
Cell
|July 29, 1994
まとめ
酵母複製の起源は,細胞サイクル全体で異なるクロマチンの状態を示します. 複製前の複合体はG1で形成され,DNA複製のタイミングを調節し,eukaryotes全体で潜在的に保存されます.
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:
- ユカリオットDNAの複製は,細胞サイクル内で厳格に規制されています.
- 因子起源の相互作用の時間的制御は,細胞サイクル進行において極めて重要です.
研究 の 目的:
- 酵母複製のクロマチンの状態を調査する 酵母複製の起源は細胞サイクル中にあります.
- DNA複製の開始時の時間調節を理解する.
主な方法:
- 複製の起源におけるゲノム足跡の分析.
- in vitroのタンパク質-DNA相互作用と in vivoのクロマチンの状態の比較.
主要な成果:
- イーストの複製の起源は,複製後の状態と複製前の状態の2つの異なる染色体状態にあります.
- 後期ミトーシスからG1まで観察されるプレレプリケーション複合体は,複製の開始に不可欠である.
- 複製後の起源は,ORCとABF1の in vitro 結合に似ており,開始のための結合が不十分であることを示しています.
結論:
- 複製起源のクロマチンの状態は,細胞サイクル中に一時的に調節されます.
- 複製前の複合体の形成は,DNA複製の重要な規制ステップである.
- プリレプリケーション状態の規制の保存は,ユカリオット全体で細胞周期毎のDNA複製を一度行うための保存されたメカニズムを示唆する.
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