静電結合がチロシンキナーゼの形状的な可塑性を可能にする方法
Cheng-Chieh Tsai1, Zhi Yue1, Jana Shen1
1Department of Pharmaceutical Sciences , University of Maryland School of Pharmacy , Baltimore , Maryland 21201 , United States.
Journal of the American Chemical Society
|September 4, 2019
まとめ
陽子結合ダイナミクスはキナーゼ構成の変化を誘導し,選択的なキナーゼ阻害剤の設計のための新しい戦略を明らかにします. これらのプロトネーションに依存する動きを理解することは 将来の薬の発見の鍵です
科学分野:
- 生物化学
- 構造生物学
- コンピュータ生物学
背景:
- タンパク質キナーゼは細胞シグナル伝達と疾患において重要な役割を果たし,複雑な形状の柔軟性を表している.
- ターゲットを絞った治療法の開発には,キナーゼの構成ダイナミクスを理解することが不可欠です.
- 現在の薬剤発見方法は この固有の可塑性によって 課題に直面しています
研究 の 目的:
- 分子ダイナミクスを用いてc-Srcキナーゼの構造図を探求する.
- キナーゼの構成変化におけるプロトネーション状態の役割を調査する.
- 薬の設計のための新しい中間状態を特定する.
主な方法:
- c-Srcキナーゼでプロトン結合分子ダイナミクスシミュレーションを行った.
- シミュレーションでは 既定のターゲット,変異,バイアスなしに 構成状態を調査した.
- 主要な残基のプロトネーション状態とその形状への影響が分析された.
主要な成果:
- 非活性および活性形態を含むすべての主要なキナーゼ構成状態が捕捉されました.
- 主要な残留物 (DFG-Asp,αC-Glu,HRD-Asp) のプロトネーション状態は形状に依存していることが判明した.
- 新しいDFG-out/α-C中間状態が特定され,触媒のLysと塩のブリッジが関与しました.
結論:
- 陽子結合はキナーゼの形状的な可塑性を裏付ける重要なメカニズムである.
- 特定された中間状態は,選択的阻害剤設計のための新しい機会を提供します.
- 陽子結合ダイナミクスを考慮すると 計算式キナーゼ研究と 薬物の発見に革命が起こります
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