Download MendeleyRational Design of an Artificial Metalloenzyme by Constructing a Metal-Binding Site Close to the Heme Cofactor in Myoglobin.
Nie, L.S., Liu, X.C., Yu, L., Liu, A.K., Sun, L.J., Gao, S.Q., Lin, Y.W.(2024) Inorg Chem 63: 18531-18535
- PubMed: 39311200 Search on PubMed
- DOI: https://doi.org/10.1021/acs.inorgchem.4c03093
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9IJO - PubMed Abstract:
In this study, we constructed a metal-binding site close to the heme cofactor in myoglobin (Mb) by covalently attaching a nonnative metal-binding ligand of bipyridine to Cys46 through the F46C mutation in the heme distal site. The X-ray structure of the designed enzyme, termed F46C-mBpy Mb, was solved in the Cu(II)-bound form, which revealed the formation of a heterodinuclear center of Cu-His-H 2 O-heme. Cu(II)-F46C-mBpy Mb exhibits not only nitrite reductase reactivity but also cascade reaction activity involving both hydrolysis and oxidation. Furthermore, F46C-mBpy Mb displays Mn-peroxidase activity by the oxidation of Mn 2+ to Mn 3+ using H 2 O 2 as an oxidant. This study shows that the construction of a nonnative metal-binding site close to the heme cofactor is a convenient approach to creating an artificial metalloenzyme with a heterodinuclear center that confers multiple functions.
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China.
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