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LINE のヘテロメリック RNP アセンブリは,系統特異の RNA 処理を制御する.

Jan Attig1, Federico Agostini2, Clare Gooding3

  • 1The Francis Crick Institute, Midland Road 1, Kings Cross, London NW1 1AT, UK; Department of Molecular Neuroscience, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK.

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|August 7, 2018
PubMed
まとめ

長い間隔の核元素 (LINE) は,哺乳類のイントロンのRNA処理を抑制するためにRNA結合タンパク質 (RBPs) を採用する. この調節は新しいトランスクリプトと組織特異的なエクソンの進化を形作る.

キーワード:
クリップLINE リピートMATR3 についてPTBP1 について代替ポリアデニレーションクリプティックエクソン進化についてエクソノゲネシスマルチバレンシースプライシング

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科学分野:

  • ゲノミクス
  • 分子生物学
  • 進化生物学

背景:

  • 哺乳類のイントロンは長いため,RNA処理中に正確なエクソン認識に課題があります.
  • 長い間隔の核元素 (LINE) は,遺伝子調節に影響を与えるイントロン内の繰り返し配列である.

研究 の 目的:

  • 哺乳類のイントロンにRNA結合タンパク質 (RBPs) を誘導するLINEの役割を調査する.
  • LINE-RBPの相互作用がRNA処理にどのように影響し,トランスクリプトの進化に貢献するかを理解する.

主な方法:

  • LINE内のRBP結合部位の分析
  • MATR3とPTBP1のようなRBPがスプライシングと3'最終処理に与える影響を調査する.
  • 若いと古いLINEのRBP結合の好みを比較し,エクソンとの近接を比較する.

主要な成果:

  • LINEは,RNA処理を抑制するMATR3とPTBP1を含む多数のRBPを勧誘する.
  • 抑圧的なRBPは,進化的に若いLINEと結合し,それらと周りの領域を隔離します.
  • エクソンに近い古いLINEは,RNA処理を強化し,組織特異のエクソン源として機能するRBPと関連しています.

結論:

  • LINEは RNA処理に影響を与える抑制RBPを組み立てるためのハブとして機能します.
  • LINEは哺乳類における新しい系統特有のトランスクリプトの進化に寄与する.
  • LINEsと関連するRBPsの進化のダイナミクスは,トランスクリプトの多様化を促進します.