Probing the nitrite and nitric oxide reductase activity of cbb3 oxidase: resonance Raman detection of a six-coordinate ferrous heme–nitrosyl species in the binuclear b3/CuB center†
Abstract
In this work we report the first spectroscopic evidence demonstrating that cbb3 oxidase catalyzes the reduction of nitrite to nitrous oxide under reducing anaerobic conditions. The reaction proceeds through the formation of a ferrous six-coordinate heme b3–nitrosyl species that has been characterized by resonance Raman spectroscopy.