クロマチンリモデラーISW1は,核mRNPバイオゲネシスを調査する品質管理因子です
Anna Babour1, Qingtang Shen1, Julien Dos-Santos1
1Université Paris Diderot, Sorbonne Paris Cité, INSERM UMR944, CNRS UMR7212, Hôpital St. Louis 1, Avenue Claude Vellefaux, 75475 Paris Cedex, France.
Cell
|November 19, 2016
まとめ
ISW1染色体改造複合体は,合成部位近くの欠陥mRNAトランスクリプトを保持する監視因子として作用する. これは効率的なmRNA生殖と核輸出の品質管理を保証します.
科学分野:
- 分子生物学
- 遺伝子発現
- クロマチン生物学
背景:
- クロマチンのダイナミクスは DNAのトランザクションに不可欠です
- mRNAエクスポートにおける転写関連クロマチンの変化の役割は不明である.
研究 の 目的:
- クロマチンの改変がmRNAリボヌクレオプロテイン (mRNP) の核輸出に影響するかどうかを調査する.
- mRNPの輸出能力の監視に関与する要因を特定する.
主な方法:
- 酵母モデルを用いて in vivo 試験を行った.
- 紫外線クロスリンクと全ゲノムRNA免疫降水 (RIP) アッセイを使用した.
- ISW1染色体改造複合体の機能を研究した.
主要な成果:
- ISW1複合体を新しいmRNP核輸出監視因子として特定した.
- ISW1は,トランスクリプトの場所の近くで, 輸出不適格なトランスクリプトを結びつけていることが示されています.
- ISW1の結合活動は,核細胞のスライディングまたはRNAポリメラーゼIIの過程性とは独立してクロマチンの結合を必要とします.
- Isw1とその共因子と早産 mRNPの間の直接的な相互作用が確認されました.
結論:
- ISW1複合体は,mRNA生殖の効率を校正する上で重要な役割を果たします.
- ISW1と核エクソソムの協調した作用は,正確なmRNA核輸出を保証します.
- この研究は,クロマチン-mRNPインターフェースの遺伝子発現の制御の新しい層を明らかにしています.
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