フリンジのグリコシルトランスフェラーゼ活性がノッチ-デルタ相互作用を調節する
K Brückner1, L Perez, H Clausen
1European Molecular Biology Laboratory, Heidelberg, Germany.
Nature
|August 10, 2000
まとめ
フリンジタンパク質は,ゴルギのノッチ受容体を改変し,ノッチがデルタリンガンドと結合する方法を変化させます. このグリコシル化メカニズムは,動物の発達中の細胞シグナリングを調節する.
科学分野:
- 発達生物学 発達生物学について
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
背景:
- ノッチ受容体のリガンドは,動物の発達に不可欠であり,組織の境界を形成します.
- フリンジタンパク質はNotchの活性化を制限することが知られているが,そのメカニズムは不明である.
研究 の 目的:
- フリンジタンパク質がノッチシグナル伝達を調節する分子機構を解明する.
- ノッチ受容体およびそのリガンド相互作用の修正におけるフリンジの役割を調査する.
主な方法:
- ゴルギ装置内のフリンジの酵素活性を調べました.
- Notch.の表皮成長因子 (EGF) モジュールの分析された修正.
- ノッチ・デルタ・リガンド結合に対するフリンジの改変の影響を調べた.
主要な成果:
- フリンジはゴルギでグリコシルトランスフェラーゼとして機能する.
- Fringeは,N-アセチルグルコサミンをフコゼに添加することによって,Notch EGFモジュールを修正します.
- このグリコシル化により,ノッチがデルタリンガンドを結合する能力が変化します.
結論:
- ノッチ受容体のフリンジ媒介型グリコシル化が重要な規制メカニズムである.
- このプロセスは,組織境界形成に不可欠なリガンド受容体相互作用を制御します.
- 細胞型に特異的なグリコシライゼーションは,体内で信号伝達を調節するための一般的な戦略である可能性があります.
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