FMRPは,シナプス機能と自閉症に関連したmRNAのリボソーム転位を停止します
Jennifer C Darnell1, Sarah J Van Driesche, Chaolin Zhang
1Laboratory of Molecular Neuro-Oncology, The Rockefeller University, New York, NY 10065, USA. darneje@rockefeller.edu
Cell
|July 26, 2011
まとめ
脆いX症候群 (FXS) でのFMRPタンパク質機能の喪失は,ニューロンの翻訳を損なう. この研究は,FMRPの標的を特定し,リボソームを停止することを示し,この翻訳ブレーキの喪失がFXSと自閉症スペクトル障害 (ASD) に寄与することを示唆しています.
科学分野:
- 神経科学は神経科学である.
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- 脆いX症候群 (FXS) と自閉症スペクトル障害 (ASD) は,FMRP機能喪失と関連しています.
- FMRPはニューロンのRNA結合タンパク質で,翻訳的調節と関連しているが,その標的とメカニズムは不明である.
研究 の 目的:
- FMRPの脳の直接的なmRNA標的を特定するために.
- ニューロン翻訳の調節におけるFMRPの作用メカニズムを解明する.
主な方法:
- FMRP-RNAの相互作用をマッピングするために,クロスリンク免疫プレシピテーション (HITS-CLIP) によって分離されたRNAの高通量配列化.
- リボソーム活性に対するFMRPの影響を研究するために,脳のポリリボソームプログラム翻訳システムの開発.
主要な成果:
- FMRPは,ASDに関連したシナプスタンパク質とトランスクリプトをコードするmRNAのコーディング領域と結合します.
- FMRPは,リボソームをターゲットmRNAに逆転的に停止させ,翻訳ブレーキとして作用します.
- このトランスレーションブレーキの喪失は,FXSの病原性に関与しています.
結論:
- FMRPは,リボソームを停止することによって,シナプスタンパク質合成の重要な調節体として機能します.
- FMRP媒介によるトランスレーション制御の失調は,FXSとASDの分子病理に寄与する.
- 発見は,FXSとASDのための潜在的な治療目標を提供します.
さらに関連する動画
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