ペリセントリン (pericentrin) は,微小管の組織に関与する高度に保存されたセンターソームタンパク質です
1Department of Biochemistry and Biophysics, University of California Medical School, San Francisco 94143.
Cell
|February 25, 1994
まとめ
研究者らは,微小管の組織化に不可欠な新しいセンターソーマルタンパク質であるペリセントリンを特定しました. ペリセントリンに対する抗体は細胞分裂を妨害し,マイクロチューブル配列の確立におけるその役割を強調する.
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.
- タンパク質生化学 タンパク質生化学
背景:
- セントロソームは,動物細胞における重要な微小管組織センター (MTOC) である.
- 周心地物質のタンパク質の組成と機能は,まだ完全に理解されていません.
研究 の 目的:
- マイクロチューブル組織に関与する新しいセンターソーマルタンパク質を特定し,特徴づけること.
- "ペリセントリン"と名付けられた,新たに発見されたセンターソーマルタンパク質の機能を調査する.
主な方法:
- 新型セントロソーマタンパク質をコードするcDNAを,硬化性硬化症患者の抗血清を用いて分離した.
- タンパク質の構造を決定するための核酸配列決定.
- 免疫光顕微鏡で,センターソーム内のタンパク質を局所化する.
- 抗ペリセントリン抗体を用いた機能的測定は,体内および体外 (Xenopus抽出物) で行われる.
主要な成果:
- 7kBのmRNAで,大きなコイルドコイルドドメインで暗号化された新しいセンターソーマルタンパク質,ペリセントリンが特定されました.
- ペリセントリンは,センターソームとアセントリオラMTOCのペリセントリオラ物質に局限する.
- 抗ペリセントリン抗体はミトーシスとメヨシス分裂を妨害し,マイクロチューブルアスター形成を阻害しました.
- ペリセントリンの機能は,成熟したセンターソームからのガンマチューブリンアセンブリとマイクロチューブルの核形成の上流にある.
結論:
- ペリセントリンは,センターソームの繊維状マトリックスに保存され,不可欠な成分です.
- 組織化されたマイクロチューブル配列の初期確立において重要な役割を果たします.
- ペリセントリンは,適切な細胞分裂プロセスに不可欠です.
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