複製DNAへの変換は,プロセス性因子との相互作用によって起こる
Adam R Parks1, Zaoping Li, Qiaojuan Shi
1Department of Microbiology, Cornell University, Ithaca, NY 14853, USA.
Cell
|August 26, 2009
まとめ
細菌のトランスポソンTn7は,複製DNAを標的としてタンパク質TnsEを使用しています. TnsEはDNA複製機構と相互作用し,活性複製部位への移植を誘導する.
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
- 微生物学 微生物学とは
背景:
- 細菌のトランポゾンTn7は,活性な複製DNAに挿入することを好む.
- このトランポジションは,トランポゾンでエンコードされたタンパク質TnsEによって媒介されます.
研究 の 目的:
- TnsEと宿主DNA複製機構の相互作用を調査する.
- Tn7が積極的に複製するDNAを標的とするメカニズムを解明する.
主な方法:
- タンパク質とタンパク質の相互作用を研究するために,in vivoおよびin vitroの生化学測定法.
- 精製されたタンパク質とDNAを用いたTnsABC+Eトランポジション反応の復元.
- DNA複製に関連した転置部位選択の分析.
主要な成果:
- TnsEは,物理的に,機能的にDNA複製プロセス性因子と相互作用します.
- in vitroトランスポーゼーションシステム (TnsABC+E) が成功裏に再構成されました.
- プロセシビティファクターは,TnsE媒介のトランポジションイベントをリオーダーし,in vivoレプリケーションバイアスを反映することが示されました.
結論:
- TnsEと複製機械の相互作用は,Tn7のターゲットサイト選択の鍵です.
- このメカニズムは,Tn7が積極的に複製するDNAに優先的にトランスポーズすることを可能にします.
- 同様のメカニズムは,他の移動性遺伝子要素によって採用されることがあります.
関連する概念動画
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The synthesis of the leading and lagging strands is a highly coordinated process. To explain this, the “Trombone model” was proposed by Bruce Alberts in 1980. The DNA loop formation starts when a primer is synthesized on the parent lagging strand. The loop grows with the...
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