S2 細胞の誘導細胞極性を使用して,Aurora-A/PinsLINKER/Dlg スピンドルの方向化経路の識別
Christopher A Johnston1, Keiko Hirono, Kenneth E Prehoda
1Institute of Neuroscience, University of Oregon, Eugene, OR 97403, USA.
Cell
|September 22, 2009
まとめ
研究者は細胞分裂を研究するための新しい方法を開発し,精密なスパインドル指向と細胞多様性にとって不可欠な重要なタンパク質領域 (Pins ((LINKER)) を特定しました.
科学分野:
- 細胞生物学 細胞生物学
- 発達生物学 発達生物学について
- 分子生物学は分子生物学である.
背景:
- 非対称な細胞分裂は細胞の多様性を生み出し,幹細胞の集団を維持します.
- 非対称的な細胞分裂中のミトス・スパインドル・アラインメントのメカニズムは完全に理解されていません.
- 皮質の極性は,スパインドルの指向を導くために極めて重要です.
研究 の 目的:
- 非極化細胞における皮質の極性を誘導する方法を開発する.
- スピンドルの方向性におけるインスクエッタブル (ピン) のパートナーの役割を特徴づける.
- ピン依存のスパインドルアラインメントの新たな領域と規制メカニズムを特定する.
主な方法:
- 通常の非極化細胞系で人工皮質の極性を構築する.
- 誘導皮質極性測定法を使用して,スパインドルの方向性を研究する.
- 異なるPartner of Inscuteable (Pins) ドメインの機能を調査する.
主要な成果:
- 保存されたPins ((LINKER)) ドメインを特定し,Disc large (Dlg) を採用するためにAurora-Aリン酸化を必要とする.
- Pins ((LINKER)) が部分的なスパインドルの方向性を促進することを実証しました.
- Pins (TPR) ドメインには,Pins (LINKER) が必要であり,ダイネインに依存した精密なスパインドル方向化を行うことが示されました.
結論:
- "誘導皮質極性"アッセイは,細胞の極性およびスパインドルの方向性を研究するための強力なツールです.
- 新しいPinsドメイン (Pins(LINKER)) と,その規制メカニズムが,Aurora-AとDlg.を巻き込んだことを発見しました.
- 精密なスパインドル指向の達成におけるPinsドメインの異なる協力的な役割が明らかになった.
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