    1.7.2.5 | nitrous oxide + 2 ferricytochrome c + H2O = 2 nitric oxide + 2 ferrocytochrome c + 2 H+ |
the reaction is nonelectrogenic, generation of a free energy profile for the entire catalytic cycle by hybrid density functional calculations. The energy profile shows that the reduction steps are endergonic and that the entire process is rate-limited by high proton uptake barriers during the reduction steps. Catalytic cycle and mechanism involving 2 different Fe atoms, modelling, detailed overview. Electrons and protons are taken from the same side of the membrane. The catalytic cycle can be divided into two parts. One part starts from the oxidized resting state with an oxo-bridge state 1, includes the two proton coupled reduction steps and results in the formation of a water molecule and the two-electron-reduced binuclear active site, states 3 and 4. The second part starts from the reduced state 4 and includes the main chemistry, that is, the reaction of two NO molecules with the reduced binuclear active site, formation and release of the nitrous oxide (N2O) molecule and ending up with the reformation of the oxidized state 1 |
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