4関節は,カデリンドメインのサブセットをリン酸化するゴルギキナーゼです
Hiroyuki O Ishikawa1, Hideyuki Takeuchi, Robert S Haltiwanger
1Howard Hughes Medical Institute, Waksman Institute and Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ 08854, USA.
まとめ
この研究では,FatとDachsousタンパク質の細胞外ドメインをリン酸化することによって,脂肪シグナリングを調節するタンパク質キナーゼとしてFour-jointedを特定しています. このキナーゼ活動は,成長と平面細胞の極性にとって不可欠であり,ゴルジ装置内で発生します.
科学分野:
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
- 発達生物学 発達生物学とは
背景:
- 異常なカデリン脂肪は,細胞の成長,遺伝子発現,および平面細胞の極性調節に不可欠です.
- ドロソフィラの遺伝学的研究は,脂肪信号伝達経路の調節に4関節遺伝子を関与させた.
研究 の 目的:
- 脂肪シグナル伝達における4関節遺伝子の分子機能を解明する.
- Four-jointedがFatとそのリガンド,Dachsousを調節するメカニズムを特定するために.
主な方法:
- バイオケミカルアッセイは,Four-jointed.の酵素活性を決定する.
- 四関節機能における酸性モチーフの役割を評価するインビトロおよびインビボ実験.
- 四関節活性の細胞部位を特定するための局所化研究.
主要な成果:
- 4関節は,FatとDachsousの細胞外カデリン領域のセリンまたはスレオニン残基をリン酸化するタンパク質キナーゼをコードします.
- Four-jointedのキナーゼ活性が酸性配列モチーフ (Asp-Asn-Glu) にマッピングされました.
- ゴルギの器官内の4つの関節機能は,輸送中にその基板をリン酸化します.
結論:
- 4関節は,細胞外タンパク質ドメインをリン酸化する最初の特定されたキナーゼです.
- Four-jointedによるこのリン酸化は,脂肪シグナル伝達における重要な規制ステップであり,成長と平面細胞の極性に影響を与えます.
- Four-jointedによるFatとDachsousのGolgi局所化されたリン酸化は,細胞シグナル伝達を制御するための新しいメカニズムを提供します.
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