Resonance Raman Spectroscopic Studies of Peroxo and Hydroperoxo Intermediates in Lauric Acid (LA)-Bound Cytochrome P450 119

Authors

Remigio Usai, Marquette University
Daniel Kaluka, Marquette University
Piotr J. Mak, Marquette UniversityFollow
Yilin Liu, Marquette UniversityFollow
James R. Kincaid, Marquette UniversityFollow

Document Type

Article

Language

eng

Publication Date

7-2020

Publisher

Elsevier

Source Publication

Journal of Inorganic Biochemistry

Source ISSN

0162-0134

Abstract

Cytochromes P450 bind and cleave dioxygen to generate a potent intermediate compound I, capable of hydroxylating inert hydrocarbon substrates. Cytochrome P450 119, a bacterial cytochrome P450 that serves as a good model system for the study of the intermediate states in the P450 catalytic cycle. CYP119 is found in high temperature and sulfur rich environments. Though the natural substrate and redox partner are still unknown, a potential application of such thermophilic P450s is utilizing them as biocatalysts in biotechnological industry; e.g., the synthesis of organic compounds otherwise requiring hostile environments like extremes of pH or temperature. In the present work the oxygenated complex of this enzyme bound to lauric acid, a surrogate substrate known to have a good binding affinity, was studied by a combination of cryoradiolysis and resonance Raman spectroscopy, to trap and characterize active site structures of the key fleeting enzymatic intermediates, including the peroxo and hydroperoxo species.

Comments

Accepted version. Journal of Inorganic Biochemistry, Vol. 208, (2020, July): 111084. DOI. © 2020 Elsevier. Used with permission.

Recommended Citation

Usai, Remigio; Kaluka, Daniel; Mak, Piotr J.; Liu, Yilin; and Kincaid, James R., "Resonance Raman Spectroscopic Studies of Peroxo and Hydroperoxo Intermediates in Lauric Acid (LA)-Bound Cytochrome P450 119" (2020). Chemistry Faculty Research and Publications. 1026.
https://epublications.marquette.edu/chem_fac/1026