bws1+でコードされた1型タンパク質フォスファタゼの関与が,分裂酵母菌のミトーシス制御に含まれる
Cell
|June 16, 1989
まとめ
研究者らは,分裂酵母細胞分裂における wee1+ の必要性を回避する新しい遺伝子,bws1+ を特定した. このバイパスはタンパク質フォスファタゼによって達成され,ミトの制御におけるフォスファタゼの役割を示唆しています.
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.
- 遺伝学 遺伝学とは
背景:
- 分裂酵母細胞分裂は,cdc25+のようなミトーシス活性化剤とwee1+のような阻害剤の相互作用によって調節されます.
- cdc25+はミトーシスに不可欠ですが,この要件は wee1-変異体では回避できます.
研究 の 目的:
- 分裂酵母ミトーシスにおけるcdc25+の必須要件を回避できる遺伝子を特定する.
- 細胞分裂の調節における新種の遺伝子の役割を調査する.
主な方法:
- 分裂酵母変異体の遺伝子スクリーニング.
- プラズミドに由来する遺伝子の分離と特徴付け.
- 核酸配列とタンパク質ホモロジー分析.
主要な成果:
- 新しい遺伝子であるbws1+が分離され,cdc25ts wee1-ダブルミュータントの温度に敏感なフェノタイプを救うことができました.
- また,bws1+は,cdc25機能喪失変異体に対するcdc2wアレルの抑制効果を回避する.
- 予測されたBws1+タンパク質は,哺乳類の1型タンパク質フォスファターゼの触媒子ユニットと高いアミノ酸同一性を共有しています.
結論:
- bws1+遺伝子は,ミトーシス制御経路に関与するタンパク質フォスファタゼをコードする.
- この発見は, wee1+のようなタンパク質キナーゼに加えて,タンパク質フォスファタゼが,分裂酵母における細胞分裂を調節する上で重要な役割を果たしていることを示唆しています.
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