Journal
ACCOUNTS OF CHEMICAL RESEARCH
Volume 40, Issue 7, Pages 554-562Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ar600046a
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- Grants-in-Aid for Scientific Research [19105004] Funding Source: KAKEN
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A series of myoglobin mutants, in which distal sites are modified by site-directed mutagenesis, are able to catalyze peroxidase, catalase, and P450 reactions even though their proximal histidine ligands are intact. More importantly, reactions of P450, catalase, and peroxidase substrates and compound I of myoglobin mutants can be observed spectroscopically. Thus, detailed oxidation mechanisms were examined. On the basis of these results, we suggest that the different reactivities of P450, catalase, and peroxidase are mainly caused by their active site structures, but not the axial ligand. We have also prepared compound 0 under physiological conditions by employing a mutant of cytochrome c(552). Compound 0 is not able to oxidize ascorbic acid.
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