mTORは,リンソームのATPに敏感な二孔Na (((+) チャンネルを調節し,代謝状態に適応させます
Chunlei Cang1, Yandong Zhou1, Betsy Navarro2
1Department of Biology, University of Pennsylvania, 415 S. University Ave., Philadelphia, Pennsylvania 19104, USA.
Cell
|February 12, 2013
まとめ
研究者らは,ライソソソームの新型ATP感受性ナトリウムチャネルであるライソナ (lysoNa) と呼ばれるATPを発見し,これは,断食中の栄養素検出と身体的耐久性にとって極めて重要です.
科学分野:
- 細胞生物学 細胞生物学
- 生理学 生理学とは
- 分子生物学は分子生物学である.
背景:
- エンドソームとリソソームは,細胞の栄養と代謝を細胞の反応と結びつける重要な臓器である.
- これらの臓器細胞が細胞内ATPレベルを感知する正確なメカニズムは,ほとんど不明のままである.
研究 の 目的:
- エンドリゾソームの新しいATP感受性イオンチャネルを特定し,特徴づけること.
- 栄養素感知と代謝適応におけるこれらのチャネルの役割を明らかにする.
主な方法:
- 電子生理学では,イオンチャネル活動を特徴付けます.
- タンパク質複合体の形成と局所化を研究するための生化学分析.
- マウスの遺伝子操作で,in vivoの機能を評価する.
主要な成果:
- TPC1,TPC2,mTORで構成される新しいエンドリソソームのATP感受性Na(+) チャンネル複合体 (lysNa(ATP)) の特定.
- ライソナ (((ATP) が栄養状態を検知し,栄養欠乏時に構成的に開くことを示す.
- ライソソーム膜ポテンシャル,pH,およびアミノ酸ホメオスタシスを調節する.
結論:
- TPCはイオンチャネルファミリーを形成し,細胞の代謝状態とエンドリソソームの機能を結びつける.
- LysoNa (ATP) は,食物制限の期間中に身体的耐久性を維持するために不可欠です.
- この発見は,細胞代謝の調節と栄養素の利用可能性に対する生物の適応に関する新しい洞察を提供します.
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