細胞骨格の緊張は,Ajuba-Warts複合体を通してヒッポの信号伝達を阻害する
Cordelia Rauskolb1, Shuguo Sun1, Gongping Sun1
1Howard Hughes Medical Institute, Waksman Institute and Department of Molecular Biology and Biochemistry, Rutgers The State University of New Jersey, Piscataway NJ 08854 USA.
Cell
|July 5, 2014
まとめ
細胞骨格の緊張は,ヒッポの経路を調節することによって,臓器の成長に直接影響を与えます. 緊張の増大は,ヨーク犬の転写因子を介してドロソフィラの翼の成長を促進し,緊張の減少はそれを減少させます.
科学分野:
- 発達生物学 発達生物学とは
- 細胞生物学 細胞生物学
- バイオフィジックス 生物物理学
背景:
- 臓器の成長には機械的な力が関与しているが,その背後にある分子メカニズムは不明である.
- 細胞骨格の緊張と生体内での成長調節の間の直接的なリンクが必要である.
研究 の 目的:
- 細胞骨格の緊張を臓器の成長調節と結びつける分子機構を解明する.
- このメカニカルトランスデュークションプロセスに関与する重要なタンパク質と経路を特定する.
主な方法:
- Drosophila melanogasterをモデル生物として利用しました.
- 細胞骨格の緊張,ミオシン活動,およびヒッポス経路の構成要素 (ヨルキー,,アジュバLIMタンパク質Jub) の役割を調査した.
- 遺伝的および生化学的アプローチを使用して,アデレンス接合点および相互作用におけるタンパク質の局所化を調べました.
主要な成果:
- 細胞骨格の緊張が増加すると,ドロソフィラの翼の成長が促進され,緊張が減少すると,翼の成長が抑制されます.
- 細胞骨格の緊張は,ヒッポの経路の下流効果因子であるヨーク (Yki) 転写因子の活動を調節する.
- アジュバのLIMタンパク質Jubは,ミオシン活動と細胞骨格の緊張をヒッポの経路内ののキナーゼ活動と結びつけ,重要な仲介者として作用します.
- Jubのアデレンス・ジャンクションへの局所化とα-カテニンとの関連は,緊張に依存し,の徴募を容易にする.
結論:
- 細胞骨格の緊張がJub.を通してヒッポス経路の活動を調節する新しいメカニズムを図解した.
- 機械的な力が臓器の成長にどのように影響するかを分子的に理解した.
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