JNKはパキシリンをリン酸化し,細胞移動を調節する
Cai Huang1, Zenon Rajfur, Christoph Borchers
1Department of Cell and Developmental Biology, Comprehensive Center for Inflammatory Disorders, University of North Carolina, Chapel Hill, North Carolina 27599-7090, USA.
Nature
|July 11, 2003
まとめ
c-Junアミノ端末キナーゼ (JNK) 経路は,パキシリンをリン酸化することによって細胞移動を調節する. このリン酸化は,細胞の急速な動きに必要なダイナミックな焦点粘着を形成するために極めて重要です.
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.
- バイオケミストリー バイオケミストリー
背景:
- c-Junアミノ端末キナーゼ (JNK) 経路は,伝統的に炎症,増殖,アポトーシスに関連しています.
- 新興の証拠は,細胞移動,特にドロソフィラの背面閉塞,およびMAPキナーゼ/ERKキナーゼキナーゼ1のような上流キナーゼ経由でのJNKの関与を示唆しています.
研究 の 目的:
- 細胞移動におけるJNK1の役割を調査する.
- 細胞運動の調節に関与するJNK1基板を特定する.
- JNK1が細胞粘着ダイナミクスに影響を与えるメカニズムを解明する.
主な方法:
- 魚のケラトサイトとネズミの膀腫瘍の上皮細胞 (NBT-II) を利用して,細胞移動を研究した.
- パキシリンに対するJNK1の活性を調べるために,in vitroおよびin vivoリン酸化測定法を使用しています.
- 移住アッセイでパキシリン (Pax(S178A)) のセリン178アラニン変異体を発現する細胞を生成および分析.
主要な成果:
- JNK1は,魚のケラトサイトとNBT-II細胞の急速な移住に不可欠です.
- JNK1は,焦点粘着アダプタタンパク質パキシリンにセルリン178を直接リン酸化する.
- Pax (S178A) 変異細胞は,移動が低下し,安定した焦点粘着を形成し,野生型の細胞と比較して移動が減少した.
結論:
- JNK1によるパキシリンのリン酸化は,効率的な細胞移動に必要な一時的な焦点結合を維持するための重要なステップです.
- この発見は,粘着回転の調節を通じて細胞の運動性を調節するJNK経路の新たな役割を強調しています.
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