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首页> 外文期刊>Electroanalysis >Uncovering and Redesigning a Key Amino Acid of Glucose Oxidase for Improved Biotechnological Applications
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Uncovering and Redesigning a Key Amino Acid of Glucose Oxidase for Improved Biotechnological Applications

机译:发现和重新设计葡萄糖氧化酶的关键氨基酸,以改善生物技术应用

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摘要

Here we uncover a key amino acid at the entrance of the active site of glucose oxidase from Penicilium amagasakiense and we successfully redesign it by nonactive site mutations, leading to enzymatic anodes with 2.4 fold higher current densities. The increase in current density could be correlated with a better interaction between the negatively charged amino acid located in position 424 and the positively charged redox mediator. We also demonstrate that this increase in current was not specific to Osmium and that further introduction of negative charges around the active site of glucose oxidase lead to a decrease in current density, illustrating the uniqueness of this amino acid in position 424.
机译:在这里,我们在amagasakiense青霉的葡萄糖氧化酶活性位点的入口处发现了一个关键氨基酸,并通过非活性位点突变成功地对其进行了重新设计,从而产生了具有高2.4倍电流密度的酶阳极。电流密度的增加可能与位置424上带负电荷的氨基酸与带正电荷的氧化还原介体之间更好的相互作用相关。我们还证明了电流的增加并非特定于O,并且在葡萄糖氧化酶活性位点附近进一步引入负电荷会导致电流密度降低,从而说明该氨基酸在位置424中的唯一性。

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