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Visualization of Endoplasmic Reticulum Localized mRNAs in Mammalian Cells
Published on: December 17, 2012
粗末なエンドプラズマ網膜におけるリボソーム受容体の特定
1Department of Biological Chemistry, UCLA School of Medicine 90024.
Nature
|August 9, 1990
まとめ
研究者らは,リボソームがエンドプラズマの網膜膜に結合することを媒介する重要なタンパク質を特定した. このタンパク質は,
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.
- タンパク質の輸送
背景:
- リボソームがエンドプラズマ網膜 (ER) の膜に付着することは,哺乳類の細胞におけるタンパク質分泌に不可欠である.
- このプロセスは,特定の統合膜タンパク質によって媒介されます.
研究 の 目的:
- リボソームと膜の結合に起因するタンパク質を特定し,特徴づけること.
- リボソーム結合におけるこの受容体の細胞領域の役割を調査する.
主な方法:
- ER膜からサイトゾールドメインのプロテオリスティック分離.
- 180Kの統合膜タンパク質の分離,浄化,および特徴付け.
- 浄化された受容体を脂質ベジクルに機能的に再構成する.
主要な成果:
- 180,000相対分子量 (Mr 180K) の統合膜タンパク質がリボソーム受容体として特定されました.
- このタンパク質の大きな細胞塩基領域 (少なくとも160K) は,ライボソーム結合を競争的に抑制する.
- 隔離された受容体は,脂質小胞に成功裏に再構成され,その機能性を実証しました.
結論:
- 180Kタンパク質は,リボソームがER膜に結合することを媒介する主要な受容体である.
- サイトゾールドメインは,リボソーム結合を調節する上で重要な役割を果たします.
- 機能的復元は,タンパク質の輸送におけるタンパク質の役割を検証する.
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Ribosomes are composed of ribosomal RNA (rRNA) and proteins. In eukaryotes, rRNA is transcribed from genes in the nucleolus—a part of the nucleus that specializes in ribosome production. Within...
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