関連する実験動画
Updated: Apr 28, 2026
10:24
Visualization of Endoplasmic Reticulum Localized mRNAs in Mammalian Cells
Published on: December 17, 2012
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エンドプラズマ網膜のレジデントタンパク質をコードする遺伝子の転写誘導には,トランスメブランタンパク質キナーゼが必要です
1Department of Biochemistry and Biophysics, University of California Medical School, San Francisco 94143-0448.
Cell
|June 18, 1993
まとめ
研究者らは,発現したタンパク質のストレス下での細胞生存に不可欠な酵母中のIRE1遺伝子を特定しました. この遺伝子はトランスメブランキナーゼとして作用し,タンパク質の折りたたみと細胞の活性を調節するために,エンドプラズマ網膜から核に信号を送信します.
科学分野:
- 細胞生物学 細胞生物学
- 分子遺伝学 分子遺伝学
- シグナルトランスデュークション.
背景:
- エンドプラズマ網膜 (ER) に展開されたタンパク質の蓄積が遺伝子転写を誘発する.
- 細胞内信号伝達経路は,ER光と核の間の通信のために必要である.
研究 の 目的:
- ERストレス反応経路に関与する遺伝子を特定する.
- ERのストレスシグナル伝達と細胞活性を媒介するIRE1の役割を調査する.
主な方法:
- S. cerevisiae変異体の遺伝子解析について.
- KAR2 と PDI1.1 の遺伝子発現分析
- ERストレス条件下における細胞生存力の評価.
主要な成果:
- 特定された遺伝子,IRE1は,ERのレジデントタンパク質BiPとタンパク質二硫化イソメラーゼの転写を活性化するために不可欠です.
- ire1-変異体は,KAR2とPDI1.1の転写が損なわれている.
- IRE1は,ERストレス中の細胞生存に不可欠です.
- IRE1は信号伝送に関与するトランスメブランセリン/スレオニンキナーゼです.
- IRE1は,イノシトールプロトトロフィーに必要であり,ERタンパク質誘導とER膜バイオゲネシスを結びつける.
結論:
- IRE1は酵母における展開タンパク質応答経路の重要な構成要素である.
- IRE1は,ERのストレス信号のセンサーとトランスデューサーとして機能します.
- ERストレス反応は,ER膜合成の調節と結びついています.
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