GroESの機能的に重要なモバイルドメインの特徴付け
S J Landry1, J Zeilstra-Ryalls, O Fayet
1University of Texas Southwestern Medical Center, Dallas 75235-9041.
Nature
|July 15, 1993
まとめ
GroELのコチャペロンは,GroELの機能に不可欠なモバイルループを持っています. このループは,GroESがGroELと結合すると不動になり,タンパク質の折り畳みを調節する重要なメカニズムを示唆します.
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
- バイオケミストリー バイオケミストリー
背景:
- GroESは,分子チャペロンであるGroELの完全な機能に不可欠です.
- GroESは,GroELによってATP結合/水解と基板放出/折り畳みを調節する.
- GroESとGroELの間の正確な分子相互作用メカニズムは不明である.
研究 の 目的:
- GroES-GroEL相互作用の分子詳細を解明する.
- GroELの機能におけるGroESの構造ダイナミクスの役割を調査する.
- 複合形成中のGroESの結合部位と形状を特定するために.
主な方法:
- GroESポリペプチドループの移動性とアクセシビリティの分析.
- groES遺伝子の変異を特定の領域にマッピングする.
- 合成GroESペプチドとGroELを用いた生化学的研究.
主要な成果:
- ネイティブGroESは,高度に移動し,アクセス可能なポリペプチドループを示しています.
- このループは,GroES/GroEL複合体の形成時に移動性とアクセシビリティを失います.
- groESの変異は,この移動ループでクラスタリングされ,GroELの相互作用に影響を与えます.
- GroESループペプチドは,GroELを特定の部位でヘアピン状に結合する.
結論:
- GroESのモバイルループは,GroELとの相互作用にとって非常に重要です.
- ループの柔軟性は,複数のGroELサブユニットに同時に結合するために不可欠です.
- この相互作用は,GroEL / 基板親和性とタンパク質の折りたたみ効率をアロステリックに調節します.
関連する概念動画
Eukaryotic Compartmentalizations
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For example, lysosomes in the animal cells...
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Gap Junctions
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Gap Junctions
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Protein Domains
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Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the anterior...
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Eukaryotic flippases are type-IV P-type ATPases or P4-ATPases belonging to P-type ATPase family proteins that are membrane-bound pumps involved in the ATP-mediated transport of ions and molecules across the membrane. Flippases flip specific phospholipids from the outer to the inner leaflet of a membrane. All P4-ATPases have one...
Flippase
Eukaryotic flippases are type-IV P-type ATPases or P4-ATPases belonging to P-type ATPase family proteins that are membrane-bound pumps involved in the ATP-mediated transport of ions and molecules across the membrane. Flippases flip specific phospholipids from the outer to the inner leaflet of a membrane. All P4-ATPases have one...


