ユカリオットチャペロニンTRiCによるアクチン折り畳みの経路
David Balchin1, Goran Miličić1, Mike Strauss2
1Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany.
Cell
|August 14, 2018
まとめ
ユカリオットのチャペロニンTRiC (TCP-1環複合体) は,細菌のGroEL/GroESとは異なり,アクチンの折り畳みを促進する. TRiCはダイナミックなアクチン中間物質を結合し,ATPに依存するコンファメーション変化を通じてそのネイティブコンファメーションを促進します.
科学分野:
- 分子生物学
- 生物化学
- 構造生物学
背景:
- チャペロニンTRiC (TCP-1環複合体) は,アクチンのような真核細胞骨格タンパク質の折り畳みに不可欠である.
- バクテリアのチャペロニン (GroEL/GroES) はアクチンを折りたたむのに無効であり,チャペロニンシステムの違いを強調しています.
研究 の 目的:
- TRiCがアクチンの原発状態への形状の進行を促進するメカニズムを解明する.
- アクチンを基質として使用したTRiCとGroEL/GroESの折り畳みメカニズムを比較する.
主な方法:
- スペクトロスコーピック技術
- 構造分析
- 生化学的測定法
主要な成果:
- アクチンは運動的に閉じ込められた ダイナミックな状態で 自発的な折り畳みに抵抗します
- TRiCは,このアクチン中間体を結合し,ネイティブのような二次構造を持つ拡張型構造を安定させます.
- GroEL/GroESは,展開状態のアクチンを安定させます.
- TRiCへのATP結合は非対称な形状変化を誘導し,ATPの水解によって部分的なアクチン放出と,その後の折りたたみをもたらす.
結論:
- TRiCの独特の構造と機能は,その必須の真核基質であるアクチンの折り畳みを制御するために不可欠です.
- このメカニズムは,生産的な折りたたみを促進するために,折りたたみの中間およびATP駆動型ダイナミクスの特定の結合を含みます.
キーワード:
CCT についてFCS についてグロエルグロエスH/DX についてトリックスアクチンチャペロニンクリオ電子顕微鏡dcFCCS についてダブルカラー光クロス相関スペクトロスコーピー光相関スペクトロシー水素-デウテリウム交換フォト誘発電子移転 (PET) -FCSさらに関連する動画
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