ガンマチューブリン (Gamma-tubulin) は,細胞周期に依存するマイクロチューブルの核形成に必要なセンターソーマルタンパク質です
H C Joshi1, M J Palacios, L McNamara
1Department of Anatomy and Cell Biology, Emory University School of Medicine, Atlanta, Georgia 30322.
Nature
|March 5, 1992
まとめ
ガンマチューブリンは,哺乳類の細胞におけるマイクロチューブルの核形成に不可欠である. このタンパク質は,細胞分裂中のセンターソーム機能と適切なスパインドルの組み立てのために必要です.
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.
- 細胞骨格のダイナミクス
背景:
- ガンマチューブリン (Gamma-tubulin) は,チューブリン族に属する保存されたタンパク質です.
- 微小管の組織センターに局所する.
- ガンマチューブリンにおける突然変異は,真菌におけるミトスの停止を引き起こします.
研究 の 目的:
- 哺乳類の細胞におけるガンマチューブリンのインビボ機能を調査する.
- マイクロチューブルの核形成と細胞サイクル進行におけるガンマチューブリンの役割を決定する.
主な方法:
- ガンマチューブリン保存セグメントに対するポリクローン抗体を生成した.
- 培養された哺乳類の細胞に抗体をマイクロ注入した.
- 免疫光を用いて,ガンマチューブリンを局所化し,マイクロチューブルの再生とスパインドル形成を評価した.
主要な成果:
- 抗体は,細胞サイクル全体を通して,ネイティブセンターソームに成功的に結合します.
- 微小管の再生は,抗体の存在でデポリメリゼーション後に抑制されました.
- ミトーシス前またはミトーシス中に注入された細胞では,スパインドルの組み立てが失敗しました.
結論:
- ガンマチューブリンは,哺乳類の細胞における微小管内核形成に不可欠である.
- セントロソーム機能とミトスのスパインドル形成において重要な役割を果たします.
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