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Updated: Jun 23, 2026

Intracellular Refolding Assay

Intracellular Refolding Assay

Published on: January 24, 2012

プリフォルディン (Prefoldin) は,細胞性チャペロニンに展開されたタンパク質を供給するチャペロンである

I E Vainberg¹, S A Lewis, H Rommelaere

¹Department of Biochemistry, New York University Medical Center, New York 10016, USA.

|June 18, 1998

まとめ

研究者らは,シェパロンタンパク質が正しく折り畳まれるのを助けるタンパク質であるプレフォルディンを発見した. プリフォルディンは,展開されたタンパク質をチャペロニンに導いて,細胞骨格の維持などの細胞機能に不可欠です.

科学分野:

分子生物学は分子生物学である.
タンパク質の折りたたみ
セルラーチャペロネスセルラーチャペロネス

背景:

サイトソリックチャペロニン (c-cpn) は,タンパク質の折り畳みに不可欠です.
アクチンやチューブリンなどの細胞骨格タンパク質は,機能するために適切な折りたたみを必要とします.

研究の目的:

タンパク質の折りたたみに関与する新しいタンパク質を特定し,特徴づけること.
プレフォルディンがチャペロニンと相互作用するメカニズムを解明する.

主な方法:

タンパク質の浄化と特徴付け.
S. cerevisiae. の遺伝子解析について
アーカイアにおけるホモロジーの検索.

主要な成果:

ヘテロヘクサミクロンチャペロンタンパク質であるプレフォルディンの発見.
プリフォルディンは,展開されたアクチンをc-cpnに特異的に結合し,転送します.
S. cerevisiaeにおけるプレフォルディン遺伝子の削除は,c-cpn変異のフェノタイプを模倣し,アクチンとチューブリン細胞骨格に影響を与える.
古代生物で発見されたプレフォルディンの同類体は,チャペロニン媒介の折り畳みにおける保存された役割を示唆しています.

結論:

プレフォルディンは,特殊なコチャペロンとして作用し,サブストラットをチャペロニンに誘導することによって,タンパク質の折り畳みを促進します.
この相互作用は,アクチンとチューブリン細胞骨格の維持に不可欠です.
プレフォルディンは,様々な生物における細胞タンパク質の恒常性において,根本的な役割を果たします.

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Coupled Assays for Monitoring Protein Refolding in Saccharomyces cerevisiae

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