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Pakはドックの下流で機能し,ドロソフィラの光受容体アクソン誘導を調節する
1Howard Hughes Medical Institute, Department of Biological Chemistry, School of Medicine, University of California, Los Angeles 90095, USA.
Cell
|July 10, 1999
まとめ
ドロソフィラp21活性化キナーゼ (Pak) は,光受容体細胞の軸索を誘導するために不可欠であり,ドックタンパク質の下流に作用します. この研究は,Pak Pakを明らかにしています.
科学分野:
- 神経科学は神経科学である.
- 細胞生物学 細胞生物学
- 発達生物学 発達生物学とは
背景:
- SH2/SH3アダプタタンパク質ドックは,ドロソフィラ光受容体 (R細胞) 成長コンのアクチン細胞骨格への誘導受容体からの信号伝導に関与しています.
- アクソン誘導の分子メカニズムを理解することは,神経の発達と修復に不可欠です.
研究 の 目的:
- R細胞のアクソン誘導とターゲティングを調節するドック経路におけるドロソフィラp21活性化キナーゼ (Pak) の役割を調査する.
- DockとPakの機能的関係を解明するために,in vivo.
主な方法:
- R細胞のアクソンと成長コンにおけるDockとPakの共同局所化研究.
- ドックとパックにおける機能喪失のフェノタイプの分析.
- パックのキナーゼ活性と,ドックとCdc42/Rac.の結合部位の評価
- 膜結合パック (Pak (((myr)) を使用した機能獲得の研究.
- Pak (((myr) の網膜発現を用いたドックミュータントの救出実験.
主要な成果:
- ドックとパックはR細胞の軸索と成長コンにコロカライズされ,物理的に相互作用する.
- ドックとパックの機能喪失による突然変異は,区別がつかない現象型を生む.
- 正常なR細胞の接続には,Pakのキナーゼ活性とDockとCdc42/Rac.ac.に結合することが必要である.
- Pak (((myr) の網膜発現は,ドック変異種におけるR細胞接続性の欠陥を救済する.
結論:
- ドロソフィラ・パックは,R細胞の軸索誘導とターゲティングの重要な調節体である.
- PakはDock in vivoのダウンストリームエフェクターとして機能します.
- Dock-Pak経路は,視覚系における適切な神経接続の確立に不可欠である.
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