タイムスケールの無偏の分子ダイナミクス 薬物の解き放たれ 移行状態の安定化相互作用を明らかにする
1Michigan State University , East Lansing, Michigan 48823, United States.
Journal of the American Chemical Society
|January 6, 2018
まとめ
この研究は,WExploreアルゴリズムを使用して,薬理学的に関連する時間スケールでの薬剤解約の最初の完全なシミュレーションを提示します. この発見は複数の解き放つ経路を明らかにし,動力学を通して薬の有効性を最適化するための洞察を提供します.
科学分野:
- 計算化学と分子ダイナミクス
- 薬理学と薬剤発見
背景:
- リガンド結合運動は,薬剤の特異性と有効性にとって極めて重要です.
- 薬物解約をシミュレートすることは,熱力学的計算と比較して計算的に困難です.
- 溶解性エポキシードヒドローラゼ (sEH) は,臨床的に有効な酵素標的である.
研究 の 目的:
- 薬理学的に重要な時間スケールで,バイアスする力なしに,薬物の解き放つ最初の完全なシミュレーションを実行する.
- 溶性エポキシド水酸化物 (sEH) から阻害剤TPPUの解き放出過程を調査する.
- 解き放つ経路と希少な出来事を分析するためにコンファメーション空間ネットワークを開発し,適用する.
主な方法:
- 偏りのないシミュレーションを WExplore と称する重み付けアンサンブルベースのアルゴリズムを使用した.
- 薬理学的に重要な時間スケールでsEHからTPPUの解き放たれをシミュレートした.
- 水素結合,溶解,非均衡の自由エネルギーを分析するために,コンファメーション空間ネットワークを使用した.
主要な成果:
- 結合空間ネットワークを使用して,リガンドの方向転換を含む複数の解き放つ経路と希少なイベントが観察されました.
- トランジション状態を予測し,それを安定させる重要なタンパク質-リガンド相互作用を特定した.
- シミュレーションから42秒の滞在時間を計算し (誤差の範囲は広い),実験の11分に近似した.
結論:
- コンフォーム空間ネットワークは,解き放つような複雑な分子プロセスを視覚化および分析するための強力なツールを提供します.
- この研究は,より広範なアクセシビリティのために,複雑な分子プロセスを数分間のスケールでシミュレートする可能性を実証しています.
- 発見は,sEH阻害剤の運動最適化に関する洞察を提供し,薬物改変戦略のための新しい仮説を生成します.
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