高効率のフラビン-アデニン・ダイヌクレオチド・グルコース脱水素酵素が最小サイトクロームC領域に融合した
Itay Algov1, Jennifer Grushka1, Raz Zarivach1,2
1Department of Life Sciences and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev , Beer-Sheva 84105, Israel.
Journal of the American Chemical Society
|September 16, 2017
まとめ
研究者達は 改良された生物電気化学の応用のために 融合酵素を設計した. この新しいフラビン・アデニン・ディヌクレオシド (FAD) 依存型グルコース脱水素酵素 (GDH) 融合により,直接の電子伝送が可能になり,グルコース感知能力が向上します.
科学分野:
- 生物化学
- バイオ電気化学
- 酵素工学
背景:
- フラビン・アデニン・ジヌクレオチド (FAD) 依存型グルコース脱水素酵素 (GDH) は,バイオ電気化学システムにとって不可欠な熱安定性のある酸素無感酵素である.
- 酵素の埋められたFADコファクターは,電極による直接の電子転送を阻害し,その適用効率を制限する.
研究 の 目的:
- 電子を直接転送できる 融合酵素を設計し 生物電気化学性能を向上させる
- FAD依存型グルコース脱水素酵素の効率を高め,グルコース検出の応用.
主な方法:
- FAD依存性グルコース脱水素酵素 (GDH) が自然最小サイトクロームドメインのc端に溶解する.
- 核融合酵素の電気化学的性質の特徴,触媒的活動と電子転送効率を含む.
主要な成果:
- 新しい融合酵素は,メディエーターなしで直接の電子移転を容易にする.
- 融合酵素は,ネイティブ酵素より約3倍高いkcatを示します.
- 誘導電流は0. 15VとAg/ AgClの発生ポテンシャルで5〜7倍高く,グルコース検知能力の改善を示した.
結論:
- エンジニアリングされた融合酵素は 優れた活性と直接的な電子転送能力を示しています
- この融合酵素は,先進的な血糖モニタリングおよび他のグルコースベースの生体電気化学システムにとって有望な候補です.
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