メタル・オーガニック・フレームワークに酵素を埋め込み,デ・ノボアプローチによる展開に対するシールド
Fu-Siang Liao1,2, Wei-Shang Lo2, Yu-Shen Hsu2
1School of Physical Science and Technology, ShanghaiTech University , Shanghai 201210, China.
Journal of the American Chemical Society
|May 2, 2017
まとめ
メタル・オーガニック・フレームワーク (MOF) に埋め込まれた酵素は,厳しい条件下で安定性と機能が向上します. このMOF封入は,カタラーゼ (CAT) のような酵素を尿素と熱による変性から保護する.
科学分野:
- 生物化学
- 材料科学
- ナノテクノロジー
背景:
- 酵素は重要な生物学的触媒です
- 酵素の安定性はしばしば環境条件によって制限される.
- メタル・オーガニック・フレームワーク (MOF) は,カプセル化のために調節可能な多孔構造を提供します.
研究 の 目的:
- MOFで封じ込められた酵素の安定性を研究する.
- デナチュレーション条件下で埋め込まれたカタラゼ (CAT) の機能的保存を評価する.
- 酵素の構造的整合性における MOF 閉じ込めの役割を理解する.
主な方法:
- ゼオリティイイミダゾラートフレームワーク (ZIF-90とZIF-8) にカタラーゼ (CAT) の新規封じ込み
- 埋め込まれたCATと自由CATをデナチュレーション条件 (6M尿素,80°C) に晒す.
- 酵素機能を測定するための活性測定と,構造的形状を評価するための光スペクトロスコーピー.
主要な成果:
- 埋め込まれたCATは6M尿素 (1.30 × 10−3s−1) と80 °C (1.05 × 10−3s−1) で有意な活性を維持した.
- フリーCATは同じデナチュレーション条件下で検出不能な活性を示した.
- 光スペクトロスコピーは,自由のCATと比較して埋め込まれたCATの構造変化の減少を示した.
結論:
- MOF内の酵素封入は,安定性と機能的長寿を著しく高めます.
- MOFのマイクロクリスタルの閉じ込めは酵素の移動性を制限し,構造と活性を維持します.
- このアプローチは,要求の高い応用のための堅固な生物触媒を開発するための有望な戦略です.
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