配列に依存するが,配列特異的ではないpiRNA粘着は,mRNAを胚性プラズマに閉じ込めます
Anastassios Vourekas1, Panagiotis Alexiou1, Nicholas Vrettos1
1Department of Pathology and Laboratory Medicine, Division of Neuropathology, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine; PENN Genome Frontiers Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
Nature
|March 8, 2016
まとめ
ピウィ相互作用RNA (piRNAs) とアベージン (Aub) タンパク質は,チューダー依存メカニズムによって生殖プラズマにメッセンジャーRNA (mRNAs) を捕獲する. このプロセスは生殖系統の特異化にとって極めて重要であり,ドロソフィラの生殖細胞形成とピRNAの遺伝を結びつける.
科学分野:
- 発達生物学
- 遺伝学
- 分子生物学
背景:
- Piwiタンパク質とpiRNAは,移植可能な要素を静止することによって,ゲノムの安定性と生殖細胞形成に不可欠です.
- メッセンジャーリボヌクレオプロテイン (mRNP) を含む母性因子は,胚性プラズマに局所化することによって,原始胚性細胞を特定する.
- 母親のピウィリボヌクレオプロテイン (piRNP) は,特にアベルギン (Aub) を含むものは,トランポゾン静止を開始するために生殖プラズマに転送されます.
研究 の 目的:
- 伝達 RNA (mRNA) がオオゲネシス過程で胚性プラズマに濃縮されるメカニズムを解明する.
- 胚性プラズマ内のmRNA捕獲におけるAub負荷のpiRNAとTudorの役割を調査する.
- piRNP複合体は,生殖線特異化とpiRNA遺伝にどのように貢献するのかを理解する.
主な方法:
- ドロソフィラのAub負荷のpiRNAsとmRNAsの相互作用を調査した.
- 細菌粒子の形成とmRNAの捕獲におけるTudorの役割を調べました.
- ドロソフィリドの胚性プラズマmRNAの特性を分析した.
主要な成果:
- アウブ負荷のpiRNAは,部分ベースペアリングを通じてmRNAを結合し,チューダー依存の方法で粘着性トラップとして機能する.
- 細菌のプラズマのmRNAは一般的により長く,より豊富で,piRNAの結合部位を多く提供します.
- トゥードール,オーブ piRNP とmRNA の複合体が形成され,piRNA の遺伝と生殖系統の特異性を結合する.
結論:
- Piwi相互作用するRNA複合体は,予期せぬ形でmRNAを胚性プラズマに閉じ込めます.
- このmRNA捕獲メカニズムは,チューダーとオーブのpiRNPに依存しており,生殖系統の特異化に不可欠です.
- この発見は,このpiRNP媒介のmRNAの動物における生殖粒子の機能に対する一般的な関連性を示唆している.
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