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"Plugging into Enzymes": Nanowiring of Redox Enzymes by a Gold Nanoparticle
Science, 2003The reconstitution of an apo-flavoenzyme, apo–glucose oxidase, on a 1.4-nanometer gold nanocrystal functionalized with the cofactor flavin adenine dinucleotide and integrated into a conductive film yields a bioelectrocatalytic system with exceptional electrical contact with the electrode support. The electron transfer turnover rate of the reconstituted
Yi, Xiao +4 more
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Enzymic redox reactions of cytochromes c
Biochemical and Biophysical Research Communications, 1972Abstract The two cytochromes c for which detailed tertiary structures have been obtained recently—cytochrome c from mammalian mitochondria and cytochrome c2 from Rhodospirillum rubrum—have been compared in reactivity in the physiologic redox systems for which the former is the natural substrate.
K A, Davis +3 more
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Protein Engineering of Redox-Active Enzymes
Antioxidants & Redox Signaling, 2009Redox-active enzymes perform many key biological reactions. The electron transfer process is complex, not only because of its versatility, but also because of the intricate and delicate modulation exerted by the protein scaffold on the redox properties of the catalytic sites.
Gloria, Saab-Rincón, Brenda, Valderrama
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Bioelectrocatalysis by redox enzymes at modified electrodes
Reviews in Molecular Biotechnology, 2002Self-assembled monolayers of thiolated compounds are used as promoters for protein-electrode reactions. They provide an anchor group based on thiol chemisorptions and also a functional group for effective interaction with the protein. These interactions are often governed by electrostatic attraction.
Scheller, Frieder W. (Prof. Dr.) +7 more
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Electrical Wiring of Redox Enzymes
Accounts of Chemical Research, 1990In a redox enzyme the functional electron transfer center, normally surrounded by an insulating protein matrix, can be electrically connected to an external source of current through a path of fast electron-relaying redox couples. Such “wiring” is achieved through electrostatically or covalently binding to the enzyme-proteins high molecular weight ...
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Nanowiring of a redox enzyme by metallized peptides
Biosensors and Bioelectronics, 2005A molecular assembly consisting of a redox enzyme, NADH peroxidase, a metallized double-helical peptide, and a gold nanoparticle immobilized onto a gold wire derivatized with a benzenedithiol compound, initiated and conducted redox signals in the presence of H(2)O(2) and NADH.
Joanne I, Yeh +2 more
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Recent preparative applications of redox enzymes
Current Opinion in Chemical Biology, 2019Redox enzymes offer many powerful transformations for the efficient industrial-scale synthesis of diverse chemicals desired by society. Here we survey recent preparative applications of redox enzymes, highlighting both mature enzyme platforms and promising technologies for future applications.
Christopher K Prier, Birgit Kosjek
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The Lifespan-Regulator p66Shc in Mitochondria: Redox Enzyme or Redox Sensor?
Antioxidants & Redox Signaling, 2010Mitochondria contribute to various diseases and aging phenotypes. Reactive oxygen species (ROS), mainly formed by the respiratory chain, were long thought to cause these effects by damaging proteins, DNA, and lipids. The emerging understanding that ROS act not only destructively but also as dedicated signaling molecules, and that aging processes are ...
Melanie, Gertz, Clemens, Steegborn
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Redox and redox-coupled processes of heme proteins and enzymes at electrochemical interfaces
Physical Chemistry Chemical Physics, 2005Modern bioelectrochemical methods rely upon the immobilisation of redox proteins and enzymes on electrodes coated with biocompatible materials to prevent denaturation. However, even when protein denaturation is effectively avoided, heterogeneous protein electron transfer is often coupled to non-Faradaic processes like reorientation, conformational ...
Daniel H, Murgida, Peter, Hildebrandt
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Polyacrylamide-Based Redox Polymer for Connecting Redox Centers of Enzymes to Electrodes
Analytical Chemistry, 1995Enzyme electrodes based on complexing a water-soluble copolymer of acrylamide and vinylimidazole with [Os(dmebpy)2C1]+/2+ (dmebpy = 4,4'-dimethyl-2,2'-bipyridine) and cross-linking with oxidases by water-soluble cross-linkers are described. The potential of the polyacrylamide-based redox polymer is +55 mV (SCE), a typical electron diffusion coefficient
T, de Lumley-Woodyear +5 more
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