Download MendeleyA Stable Ferryl Porphyrin at the Active Site of Y463M BthA.
Rizzolo, K., Weitz, A.C., Cohen, S.E., Drennan, C.L., Hendrich, M.P., Elliott, S.J.(2020) J Am Chem Soc 142: 11978-11982
- PubMed: 32564595
- DOI: https://doi.org/10.1021/jacs.0c04023
- Primary Citation of Related Structures:
6V59 - PubMed Abstract:
BthA is a diheme enzyme that is a member of the bacterial cytochrome c peroxidase superfamily, capable of generating a highly unusual Fe(IV)Fe(IV)═O oxidation state, known to be responsible for long-range oxidative chemistry in the enzyme MauG. Here, we show that installing a canonical Met ligand in lieu of the Tyr found at the heme of MauG associated with electron transfer, results in a construct that yields an unusually stable Fe(IV)═O porphyrin at the peroxidatic heme. This state is spontaneously formed at ambient conditions using either molecular O 2 or H 2 O 2 . The resulting data illustrate how a ferryl iron, with unforeseen stability, may be achieved in biology.
Organizational Affiliation:
Boston University, Department of Chemistry, Boston, Massachusetts 02215, United States.
