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首页> 外文期刊>Langmuir: The ACS Journal of Surfaces and Colloids >Electroactive Nanobiomolecular Architectures of Laccase and Cytochrome c on Electrodes: Applying Silica Nanoparticles as Artificial Matrix
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Electroactive Nanobiomolecular Architectures of Laccase and Cytochrome c on Electrodes: Applying Silica Nanoparticles as Artificial Matrix

机译:漆酶和细胞色素c在电极上的电活性纳米生物分子体系结构:应用二氧化硅纳米粒子作为人工基质

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摘要

Fully electroactive multilayer architectures combining the redox protein cytochrome c and the enzyme laccase by the use of silica nanoparticles as artificial matrix have been constructed on gold electrodes capable of direct dioxygen reduction. Laccase form Trametes versicolor and cytochrome c from horse heart were electrostatically coimmobilized by alternate deposition with interlayers of silica nanoparticles in a multilayer fashion. The layer formation has been monitored by quartz crystal microbalance. The electrochemical properties and performance of the nanobiomolecular entities were investigated by cyclic voltammetry, indicating, that a multistep electron transfer cascade, from the electrode via cytochrome c in the layered system toward the enzyme laccase, and here to molecular dioxygen was achieved. The response of the novel architecture is based on direct electron exchange between immobilized proteins and can be tuned by the assembly process.
机译:通过使用二氧化硅纳米粒子作为人工基质,将氧化还原蛋白细胞色素c和酶漆酶结合在一起的完全电活性多层体系结构已经构建在能够直接还原双氧的金电极上。通过交替沉积与二氧化硅纳米颗粒的中间层以多层方式静电沉积来自马心脏的漆酶形式的杂色Trametes和细胞色素c静电共固定化。通过石英晶体微量天平监测层的形成。通过循环伏安法研究了纳米生物分子实体的电化学性质和性能,表明从电极通过分层系统中的细胞色素c到酶漆酶,再到分子双氧,实现了多步电子转移级联。新型结构的响应基于固定蛋白质之间的直接电子交换,并且可以通过组装过程进行调节。

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