新しいタンパク質キナーゼホモログは,酵母ライソソームのような真空球にタンパク質を分類するために不可欠です
P K Herman1, J H Stack, J A DeModena
1Division of Biology, California Institute of Technology, Pasadena 91125.
Cell
|January 25, 1991
まとめ
Vps15タンパク質キナーゼは酵素を酵母真空球に誘導するために重要である. そのキナーゼ活性に影響する変異は,このプロセスを破壊し,リン酸化がタンパク質の分類を調節することを示す.
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:
- イーストの真空球は,細胞のプロセスに不可欠です.
- ハイドロラーゼを真空球に効率的に送ることは非常に重要です.
- 真空タンパク質分類における特定のタンパク質キナーゼの役割は完全に理解されていません.
研究 の 目的:
- VPS15遺伝子とその暗号化されたタンパク質の機能を調査するために,Vps15p.
- 酵母真空球へのタンパク質の分類におけるVps15pキナーゼ活動の役割を決定する.
- Vps15pが真空タンパク質配送を媒介するメカニズムを解明する.
主な方法:
- Vps15pキナーゼドメインのサイト指向型変異.
- 変異株における真空ヒドロラーゼ分泌の分析.
- In vivoフォスフォリレーションアッセイ.
- サブセルラー分断と生化学的関連研究.
主要な成果:
- Vps15pキナーゼドメインの点変異は,真空タンパク質酵素の分泌につながる.
- Vps15pのインビボリン酸化は,キナーゼドメイン変異体において障害がある.
- Vps15pは,末期のゴルギまたは膀部と周辺的に関連しています.
- Vps15pにはコンセンサスミリストイレーション信号が含まれており,脂質の改変を示唆しています.
結論:
- Vps15pキナーゼの活動は,効率的な真空タンパク質分類に不可欠です.
- Vps15pが媒介するタンパク質のリン酸化は,細胞内輸送における規制スイッチとして作用する可能性が高い.
- Vps15pは,ゴルギまたはバシキュラ媒介のトランスポートで,真空球に機能する可能性があります.
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