mTORは,PGL粒子の相分離を調節し,そのオートファージ分解を調節する
Gangming Zhang1, Zheng Wang1, Zhuo Du2
1National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 100101 Beijing, P.R. China.
Cell
|September 4, 2018
まとめ
C. elegansのフェーズ分離されたPGL粒子はSEPA-1とEPG-2によって調節される. その性質は分解を制御し,mTORC1媒介による変化は熱ストレスへの適応を助長する.
科学分野:
- 細胞生物学
- 発達生物学
- バイオ物理学
背景:
- 段階的に分離された構造は 発達と病気にとって不可欠です
- 生理学的相分離の調節と機能は,まだ十分に理解されていない.
研究 の 目的:
- C. elegansの胚形成における相分離の調節と機能を調査する.
- PGLの粒子の性質が分解とストレス反応にどのように影響するかを決定する.
主な方法:
- モデル生物としてC.エレガンスを利用した.
- 液体液相分離 (LLPS) による研究されたPGL粒子の組立.
- SEPA-1,EPG-2,mTORC1のシグナリングの役割を分析した.
主要な成果:
- PGLの粒子はLLPSで組み立てられ,その大きさと性質は自滅性分解に影響する.
- SEPA-1はPGL-1/-3 LLPSを促進し,EPG-2は粒子のサイズとダイナミクスを調節する.
- mTORC1媒介のリン酸化は,熱ストレス下でのPGL-1/ 3相分離を加速し,分解に対する耐性を付与する.
- PGLの粒子の蓄積は熱ストレスへの適応反応であり,胚の生存能力を維持します.
結論:
- PGL-1/3のmTORC1媒介のLLPSはストレスセンサーとして機能する.
- このメカニズムは,段階分離と自己消化分解と,発達中のストレス適応を結びつけます.
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