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二重特異性キナーゼDYRK3カップル ストレス粒子の凝縮/溶解からmTORC1のシグナル伝達
Frank Wippich1, Bernd Bodenmiller, Maria Gustafsson Trajkovska
1Institute of Molecular Life Sciences, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
Cell
|February 19, 2013
まとめ
細胞のストレスはDYRK3キナーゼを誘発し,P粒子の安定性とmTORC1の信号伝達を制御する. アクティブなDYRK3は,隔離されたmTORC1を放出し,液相移行を細胞信号伝達経路と結びつける.
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.
- バイオケミストリー バイオケミストリー
背景:
- RNAの粒子の形成のように,液体-液体分離による細胞分裂は,細胞のプロセスと信号伝達に影響します.
- 液体-液体の分離と信号伝導を結びつける正確な分子機構は完全に理解されていません.
研究 の 目的:
- 細胞のストレス中に液体-液体分離と信号伝導を結びつける分子メカニズムを解明する.
- 双重特異性キナーゼDYRK3がP粒子のような構造とmTORC1シグナル伝達を調節する役割を調査する.
主な方法:
- ストレス粒子のダイナミクスとmTORC1シグナル伝達におけるDYRK3の役割を調査した.
- DYRK3のN端の低複雑性ドメインとキナーゼ活性を使用して,ストレス粒子とサイトゾールの間の周期的な分割を分析した.
- DYRK3の活性状態がストレス粒子の溶解,mTORC1の放出,PRAS40のリン酸化に及ぼす影響を調べました.
主要な成果:
- DYRK3は,細胞のストレス中にP粒状の構造とmTORC1のシグナル伝達の安定性を調節する.
- DYRK3は,N端の低複雑性ドメインとキナーゼ活性によって媒介される,ストレス粒子とサイトゾール間の周期的な分割を示します.
- 不活性なDYRK3は,ストレス粒子を安定させ,mTORC1を吸収する;活性なDYRK3は,PRAS40.0をリン酸化することによって,ストレス粒子の溶解,mTORC1の放出,mTORC1の活性を促進する.
結論:
- DYRK3は,液相移行と細胞シグナル伝達を通じた細胞プラズマの区画化との間の重要なリンクとして機能します.
- このメカニズムは,細胞分割のダイナミックな変化が,mTORC1.1.のような信号伝達経路をどのように直接調節できるかを強調しています.
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