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Literature summary for 1.7.2.1 extracted from

  • Isoda, N.; Yokoyama, H.; Nojiri, M.; Suzuki, S.; Yamaguchi, K.
    Electroreduction of nitrite to nitrogen oxide by a copper-containing nitrite reductase model complex incorporated into collagen film (2009), Bioelectrochemistry, 77, 82-88.
    View publication on PubMed
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Organism

Organism UniProt Comment Textmining
synthetic construct
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Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
additional information electrocatalytic reduction of nitrite to NO by CuMe2bpaCl2, as a model for the active site of copper containing nitrite reductase. The 77-K EPR spectrum of CuMe2bpaCl2 in the collagen matrix reveals the typical axial signals of a tetragonal Cu2+ chromophore. The redox potential is -63 mV at pH 5.5. In the presence of nitrite, an increase in the cathodic current is observed in the cyclic voltammogram of CuMe2bpaCl2 in the collagen matrix. Upon reaching -300 mV, a linear generation of NO is observed for the CuMe2bpaCl2/collagen film-coated electrode. The relationship between the rate of NO generation and the nitrite concentration in solution using the Michaelis-Menten equation, results in Vmax 3.16 nM per s and Km 1.1 mM at pH 5.5. The current increase and the reaction rate are dependent on the pH of the solution. The mechanism of nitrite reduction by the copper complex in the collagen matrix is the same mechanism as that of the enzyme in aqueous solution synthetic construct ?
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