人間の wee1は,細胞核を細胞質活性化Cdc2キナーゼから保護することによって,ミトスのタイミングを維持する
R Heald1, M McLoughlin, F McKeon
1Department of Cellular and Molecular Physiology, Harvard Medical School, Boston, Massachusetts 02115.
Cell
|August 13, 1993
まとめ
人間の wee1キナーゼは,細胞プラズマ的に活性化されたcdc2キナーゼから核を保護し,ミトーシス前にDNA複製の完了を保証します. これは,壊滅的なミトスの侵入を防止し,細胞サイクル進行を調整します.
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.
- バイオケミストリー バイオケミストリー
背景:
- 分裂酵母ウィー1とcdc25は,cdc2を介して対抗的にミトーシスを調節する.
- 細胞サイクル制御におけるヒト wee1-のようなチロシンキナーゼの役割が調査されています.
研究 の 目的:
- 細胞循環の調節におけるヒト wee1-のようなチロシンキナーゼの機能を明らかにする.
- ミトスのエントリーにおける wee1,cdc25C,cdc2の相互作用を理解する.
主な方法:
- wee1,cdc25C,およびサイクリンB1.1の局所化研究
- DNA複製とミトーシスに関連したcdc2キナーゼ活性分析.
主要な成果:
- ヒューマンウィー1は,活性化されたcdc2.2を阻害することによって早発ミトーシスを防止する核タンパク質です.
- cdc25CとサイクリンB1は,G2/M移行時に核に局所する.
- cdc2の活性化は,核に入る前に細胞質で起こるようです.
結論:
- 人間の Wee1は,細胞核を細胞プラズマの cdc2 活性化から守ることによって,S-M 移行を調整する.
- 活性化されたcdc2の核の局所化は,ミトーシスイベントの開始に不可欠です.
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