Prickleはフィードバック増幅を介し,非対称な平面細胞の極性シグナリングを生成します
David R P Tree1, Joshua M Shulman, Raphaël Rousset
1Department of Pathology, Stanford University School of Medicine, 300 Pasteur Drive, CA 94305, USA.
Cell
|May 23, 2002
まとめ
ドロソフィラの平面細胞の極性は,ピークル依存フィードバックループによって調節されます. このメカニズムは,FrizzledとDishevelledのタンパク質の非対称な局所化を保証し,細胞の極性確立に不可欠です.
科学分野:
- 発達生物学 発達生物学について
- 細胞シグナル伝達 細胞信号伝達
- 分子生物学は分子生物学である.
背景:
- 平面細胞の極性 (PCP) 信号は組織組織を確立します.
- 主要なタンパク質には,Frizzled (Fz),Dishevelled (Dsh) およびPrickle (Pk) が含まれています.
- タンパク質の対称分布は,発達過程で非対称な局所化へと移行する.
研究 の 目的:
- 非対称なPCPタンパク質の局所化を生成するPrickleの役割を明らかにする.
- フリズルとディシャベルドの分布を制御するフィードバックメカニズムを調査する.
- 細胞間通信が細胞の極性に影響する方法を理解する.
主な方法:
- ドロソフィラ幼虫の翼細胞におけるタンパク質の局所化の分析.
- プリクルがディシェベルドとのやり取りを調査している.
- FzとDshの分布にPrickleの欠落が与える影響を評価する.
主要な成果:
- 刺さりは,非対称なFrizzledとDishevelledのローカライゼーションに不可欠です.
- 刺は近接的に局所化し,膜の徴集を阻害する.
- フィードバックループは,隣接するセル間のFrizzledレベルの違いを拡大します.
結論:
- ピークルはPCPに不可欠な細胞間フィードバックループを媒介する.
- このループは,非対称なタンパク質の濃縮によって,細胞の極性の堅固な確立を保証する.
- このメカニズムを理解することで,発達中の組織パターンの洞察が得られます.
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