膜のない活性滴の移動を駆動する化学反応
Mirco Dindo1, Alessandro Bevilacqua1, Giovanni Soligo2
1Protein Engineering and Evolution Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0412, Japan.
Journal of the American Chemical Society
|April 15, 2024
まとめ
生物学的な化学反応を模倣した 細胞サイズの滴を作りました これらの液滴は 化学的グラデーションに沿って移動し 集合的に相互作用し 代謝経路を再構成し 新しい生物学的素材と 合成生物学ツールを提供できます
科学分野:
- バイオミメティック素材
- 合成生物学
- 化学工学
背景:
- 細胞の化学反応が 自然界の集団行動に 影響を及ぼします
- 細胞の複雑さにより,in vitro 化学反応を再現することは困難です.
- 既存の方法は 微生物規模の 細胞の特徴を模倣するのに苦労しています
研究 の 目的:
- 細胞の大きさのドロップルを設計して 自動運動と集団的相互作用を可能にします
- 指示されたドロップレットの移動のためのpHグラデントの使用を調査する.
- プロトメタボリック経路を再構成する 可能性を示そう
主な方法:
- 細胞サイズの酵素活性な膜のないドロップルの生成
- 内部の酵素活性を利用して外部の pH グラデーションを作り出す.
- 自分で生成した化学的グラデーションに沿ってドロップレットの移動を観察し制御する.
- 酵素の活性を調節して 液滴の移動速度を調整する
主要な成果:
- 酵素活性滴は,pHグラデーションに沿って指向された移動を示した.
- ドロップレットの移動は 選択的に隣接するドロップレットに 向けられ 集団的行動を示した.
- 内部の酵素活性を変えることで 移行速度を調整することができました
- 単純なプロトメタボリック経路の復元を促進し,製品生成を促進しました.
結論:
- 単純で安定した 膜のないドロップルは 化学反応のような複雑な生物学的現象を 再現できます
- バイオインスパイアされた素材や 合成生物学の 汎用的なプラットフォームとして機能します
- この発見により プログラム可能な行動を持つ 活性軟質系を設計する 新しい道が開かれました
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