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多価性 hnRNP アセンブリの哺乳類における規制拡大
Serge Gueroussov1, Robert J Weatheritt2, Dave O'Hanlon3
1Donnelly Centre, University of Toronto, Toronto, ON, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada.
Cell
|July 15, 2017
まとめ
哺乳類の進化は,RNA結合タンパク質の本質的に乱れた領域 (IDRs) の代替スプライシング (AS) の影響を示しています. このASはタンパク質アセンブリの形成を制御し,遺伝子スプライシングを制御し,細胞の調節能力を拡張します.
科学分野:
- 進化生物学
- 分子生物学
- 遺伝学
背景:
- 脊椎動物の進化の過程で 代替スプライシング (AS) パターンは急速に分岐する.
- ほとんどの種と系統特有のスプライシングイベントの機能は,ほとんど不明のままです.
- 本質的に乱れた領域 (IDR) は,タンパク質の機能と調節に不可欠です.
研究 の 目的:
- 哺乳類特有のASの機能的意義を調査する.
- タンパク質とタンパク質の相互作用と遺伝子調節におけるASの役割を明らかにする.
- 哺乳類の細胞における制御機構の進化的拡大を理解する.
主な方法:
- 哺乳類のゲノムにおける代替スプライシングパターンの分析
- 種特有のASイベントの特定
- RNAとタンパク質の相互作用と複合体の形成の調査.
- タンパク質の組成とスプライシングの調節に対するASの影響に関する機能研究.
主要な成果:
- 哺乳類特異的なAS現象は,本質的に乱れた領域 (IDR) をコードするタンパク質領域で濃縮されます.
- これらのイベントはRNA結合タンパク質ファミリー (hnRNP AとD) に影響し,グリシン/タイロシン繰り返しを伴う.
- ディフェンショナルエクソンインクルージョンはチロシン依存の多価 hnRNP アセンブリを制御する.
- 規則は,異常に長距離哺乳類特異的なRNA複合体を要求する.
結論:
- hnRNP間のIDR媒介相互作用のAS制御は,スプライシングの重要な規制メカニズムである.
- このメカニズムは哺乳類の細胞の 制御能力を拡大しました
- ASの進化的変化は,新しい調節機能と潜在的に人間の病気に寄与します.
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