Journal
CHEMISTRY & BIODIVERSITY
Volume 18, Issue 4, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cbdv.202000910
Keywords
P450s; capsaicin; bioconversion; hydroxylation; epoxidation; dehydrogenation
Funding
- Natural Science Foundation of Zhejiang Province, China [LGJ20C010001]
- Research Start-Up Fund of Zhejiang Sci-Tech University [18042236-Y]
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CYP105D7 enzyme catalyzes hydroxylation, epoxidation, and dehydrogenation of the pharmaceutical agent capsaicin, demonstrating its functional diversity. This study is the first to illustrate that capsaicin can be catalyzed by prokaryotic P450 enzymes.
Cytochrome P450 enzymes (P450s) are versatile biocatalysts, which insert a molecular oxygen into inactivated C-H bonds under mild conditions. CYP105D7 from Streptomyces avermitilis has been reported as a bacterial substrate-promiscuous P450 which catalyzes the hydroxylation of 1-deoxypentalenic acid, diclofenac, naringenin, compactin and steroids. In this study, CYP105D7 catalyzes hydroxylation, epoxidation and dehydrogenation of capsaicin, a pharmaceutical agent, revealing its functional diversity. The kinetic parameters of the CYP105D7 oxidation of capsaicin were determined as K-m=311.60 +/- 87.30 mu M and k(cat)=2.01 +/- 0.33 min(-1). In addition, we conducted molecular docking, mutagenesis and substrate binding analysis, indicating that Arg81 plays crucial role in the capsaicin binding and catalysis. To our best knowledge, this study presents the first report to illustrate that capsaicin can be catalyzed by prokaryotic P450s.
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