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機械学習は酵素触媒を促進する化学的特性を特定する
Brian M Bonk1,2, James W Weis2,3,4, Bruce Tidor1,2,3,4
1Department of Biological Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States.
Journal of the American Chemical Society
|February 15, 2019
まとめ
研究者は触媒速度を劇的に増加させる特定の酵素構造を特定しました ケトール酸還元異合酶 (KARI) のこの発見は,工業的な応用を促進する酵素工学の新しい戦略を提供します.
科学分野:
- 酵素触媒と工学
- 計算式生体物理学
- 生物化学
背景:
- 酵素構造-動力学-機能関係は完全に理解されていません.
- 現在の酵素工学の能力は 産業の需要を満たしていません
研究 の 目的:
- ケトル酸還元異合酶 (KARI) の触媒を駆動する構造的および動的要因を調査する.
- 反応性を高める酵素基板複合体の構造を特定する.
- 酵素反応運動の予測モデルを開発する.
主な方法:
- 移行インターフェイスサンプリングを用いた計算統計力学.
- 機能選択と予測モデリングのための機械学習
- 形状と動的記述子の分析
主要な成果:
- コンフォーマーション・ディスクリプタだけでは,反応性を85%以上の正確さ (90%AUC) で予測できます.
- キーディスクリプターには,基板の形状,結合の極化,金属の調整が含まれます.
- 特定の形状領域に軌道を制限すると,計算された反応性が著しく増加します.
結論:
- 反応性促進領域は,酵素基板構成空間内に存在する.
- これらの地域を特定し,検証するために開発された方法論.
- 酵素を再設計することで これらの領域を埋めることで 率を大幅に向上させることができます
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