フォスファティド酸媒介によるmTOR信号伝達のミトゲン活性化
Y Fang1, M Vilella-Bach, R Bachmann
1Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, 601 South Goodwin Avenue, B107, Urbana, IL 61801, USA.
Science (New York, N.Y.)
|December 1, 2001
まとめ
リン酸 (PA) は,ラパミシン (mTOR) 信号伝達の哺乳類のターゲット,細胞の成長とタンパク質合成の制御に不可欠です. この脂質はmTORと直接相互作用し,ミトゲンを細胞成長と結びつけ,ラパミシンを説明する.
科学分野:
- 分子生物学は分子生物学である.
- 細胞シグナル伝達 細胞信号伝達
- バイオケミストリー バイオケミストリー
背景:
- 哺乳類のラパミシン (mTOR) 経路の標的は,成長,増殖,タンパク質合成などの基本的な細胞過程を調節する.
- mTORはミトゲンと栄養素からの信号を統合して,メッセンジャーRNA翻訳を含む下流の細胞活動を制御します.
研究 の 目的:
- 哺乳類のラパミシン (mTOR) 信号伝達のターゲットに関与する重要な成分を特定する.
- mTORの活性化と調節におけるリン酸 (PA) の役割を明らかにする.
- ミトゲン刺激,PA,mTOR活動とのメカニズム的な関連性を探求する.
主な方法:
- 哺乳類の細胞におけるミトゲン刺激を研究した.
- 測定された細胞のフォスファティド酸 (PA) の蓄積は,フォスフォリファーゼDに依存する.
- PAとmTORのラパミシン結合ドメインの相互作用を評価した.
- mTORのダウンストリーム効果因子の活性化に対するPAの影響を評価した.
主要な成果:
- ミトゲン刺激により,細胞のフォスファティジ酸 (PA) がフォスフォリパゼDに依存して増加した.
- 蓄積されたPAは,mTORのダウンストリームシグナル伝達経路の活性化に不可欠でした.
- リン酸 (PA) は,mTORのラパミシン感受ドメインに直接結合し,下流活性化と相関しています.
結論:
- リン酸 (PA) は,ラパミシン (mTOR) 信号伝達の哺乳類のターゲットにおける重要な脂質媒介体である.
- PAはミトゲンシグナルをmTOR活性化と結びつけ,タンパク質合成と細胞成長に影響を与えます.
- この発見は,PA-mTOR相互作用による免疫抑制剤ラパミシンの作用のメカニズムを示唆しています.
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