単一のRNAのエピトランスクリプトミックの調節を研究するためのリーダータンパク質
Journal of the American Chemical Society
|September 6, 2018
まとめ
研究者は,生細胞におけるN6-メチラデノシン (m6A) 変化を研究するために,プログラム可能なRNA結合タンパク質を開発した. このツールは,特定のトランスクリプトのRNAの安定性と翻訳を正確に制御できます.
科学分野:
- 分子生物学
- エピジェネティクス
- RNA 生物学
背景:
- 転写後の遺伝子調節は哺乳類のタンパク質生産に不可欠です.
- N6-メチラデノシン (m6A) のようなRNAの化学的変異は,重要な規制メカニズムです.
- シングル・トランスクリプトレベルでの m6A 調節器 (ライター,消去器,読者) の相互作用は不明である.
研究 の 目的:
- 生体細胞における単一のRNAトランスクリプトに対する特定のm6Aリーダーの規制効果を調査するためのツールを開発する.
- RNA の運命を制御する m6A 調節体の競争的相互作用を解明する.
主な方法:
- プログラム可能なdPspCas13b-m6Aリーダプロテインを,触媒的に不活性なPspCas13bをm6Aリーダプロテイン (YTHDF1,YTHDF2) と融合させることで開発.
- ガイドRNA (gRNA) を利用して,読者タンパク質を特定の興味のあるRNAにターゲットに配信する.
- レポーター構造体と内生的なmRNAターゲットの読者タンパク質機能の実証.
主要な成果:
- 融合した読者タンパク質 (YTHDF2,YTHDF1) は,既知の機能を保持した:YTHDF2が誘発したRNAの分解,YTHDF1が誘発した翻訳.
- このシステムは,内生的なmRNAトランスクリプトを成功裏に標的とした.
- YTHDF2を内在的なmRNAに結合させると,その分解を引き起こした.
結論:
- dPspCas13bベースのツールは,生細胞におけるRNA調節のトランスクリプト特異的な研究を可能にします.
- これらのツールは,単一のトランスクリプトレベルでのRNA調節の理解を高めます.
- 開発されたツールは,RNA操作による遺伝子発現の制御のための合成生物学における潜在的な応用がある.
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