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翼のないシグナル伝達には,翼のないトランスクリプトのアピカルローカライゼーションが必要である
A J Simmonds1, G dosSantos, I Livne-Bar
1Banting and Best Department of Medical Research, University of Toronto, Room 312, Charles H. Best Institute, 112 College Street, Ontario, Toronto, Canada.
Cell
|May 5, 2001
まとめ
ウイングレス (Wnt) mRNAの位置が,ウイングレスタンパク質の分布と表皮細胞における機能を決定する. このmRNAの局所化メカニズムは保存され,細胞の極性を確立するために不可欠です.
科学分野:
- 細胞生物学 細胞生物学
- 発達生物学 発達生物学とは
- 分子生物学は分子生物学である.
背景:
- 極化した上皮質は,発達中の組織と成人の組織に不可欠です.
- タンパク質の密輸は,上皮細胞における非対称なタンパク質分布の推定メカニズムである.
研究 の 目的:
- 翼のないシグナル伝達タンパク質の分布と機能におけるmRNA局所化の役割を調査する.
- 翼のないmRNAの頂点の局所化の基礎となるメカニズムを決定する.
主な方法:
- mRNAの分布を視覚化するために,高解像度のin situハイブリダイゼーション.
- 3' UTR 配列解析により,局所化要素を特定する.
- タンパク質の分布とシグナル伝達活動を評価するための機能検査.
主要な成果:
- 翼のないmRNAは,検査されたほとんどの組織で頂点的局所化を示しています.
- 3' UTR の2つの独立した要素が,この頂点的局所化を媒介する.
- これらの元素を変化させることで,タンパク質の分布が変化し,信号伝達活動が低下した.
結論:
- サブセルラーmRNAの局所化は,無翼タンパク質の分布と機能の重要な決定因子です.
- このメカニズムは保存されており,上皮細胞の極性形成に共通の役割を果たしている可能性が高い.
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