NO2−-mediated nitrosylation of ferrous microperoxidase-11

Microperoxidase-11 (MP11) is an undecapeptide derived from cytochrome c playing a primary role for dissecting the distinct contributions of the protein moiety and of the metal catalytic center. In fact, ferrous penta-coordinated MP11 catalyzes the conversion of NO2− to NO, followed by heme-Fe(II) nitrosylation, whereas hexa-coordinated cytochrome c is unreactive.82