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Literature summary for 1.7.2.5 extracted from

  • Blomberg, M.R.; Siegbahn, P.E.
    Why is the reduction of NO in cytochrome c dependent nitric oxide reductase (cNOR) not electrogenic? (2013), Biochim. Biophys. Acta, 1827, 826-833.
    View publication on PubMed

Organism

Organism UniProt Comment Textmining
Pseudomonas aeruginosa
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Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
additional information quantumchemical calculations show that the reduction of the NO molecules by the enzyme and the formation of N2O are very exergonic steps, making the rereduction of the enzyme endergonic and rate-limiting for the entire catalytic cycle. Therefore the NO reduction cannot be electrogenic, i.e. cannot take electrons and protons from the opposite sides of the membrane, since it would increase the endergonicity of the rereduction when the gradient is present, thereby increasing the rate-limiting barrier, and the reaction would become too slow. It also means that proton pumping coupled to electron transfer is not possible in cytochrome c-dependent nitric oxide reductase Pseudomonas aeruginosa ?
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