A functional nitric oxide reductase model.
A functional heme/nonheme nitric oxide reductase (NOR) model is presented. The fully reduced diiron compound reacts with two equivalents of NO leading to the formation of one equivalent of N(2)O and the bis-ferric product. NO binds to both heme Fe and nonheme Fe complexes forming individual ferrous nitrosyl species. The mixed-valence species with an oxidized heme and a reduced nonheme Fe(B) does not show NO reduction activity. These results are consistent with a so-called "trans" mechanism for the reduction of NO by bacterial NOR.
Department of Chemistry, Stanford University, Stanford, CA 94305, USA. jpc@stanford.edu
James P
JP
Collman
Ying
Y
Yang
Abhishek
A
Dey
Richard A
RA
Decréau
Somdatta
S
Ghosh
Takehiro
T
Ohta
Edward I
EI
Solomon
D001426:Bacterial Proteins / Q000737:chemistry*; D001665:Binding Sites; D006418:Heme / Q000737:chemistry*; D007501:Iron; D008024:Ligands; D008958:Models, Molecular; D009569:Nitric Oxide; D010088:Oxidoreductases / Q000737:chemistry*; D011487:Protein Conformation; D013057:Spectrum Analysis
D001426:Bacterial Proteins; D008024:Ligands; D009569:Nitric Oxide; D006418:Heme; D007501:Iron; D010088:Oxidoreductases; C034747:nitric-oxide reductase