Total Syntheses and Chemical Biology Studies of Hymeglusin and Fusarilactone A, Novel Circumventors of beta-Lactam Drug Resistance in Methicillin-Resistant Staphylococcus aureus

ChemMedChem. 2021 Mar 29. doi: 10.1002/cmdc.202100219. Online ahead of print.

ABSTRACT

Hymeglusin, a previously known eukaryotic hydroxymethylglutaryl-CoA (HMG-CoA) synthase inhibitor, was identified as circumventing the β -lactam drug resistance in methicillin-resistant Staphylococcus aureus (MRSA). We describe the concise total syntheses of a series of natural products, which enabled determination of the absolute configuration of fusarilactone A and provided structure-activity relationship information. Based on previous reports, we speculated that the target protein of this circumventing effect may be MRSA mvaS. We found that this enzyme was dose-dependently inhibited by hymeglusin. Furthermore, overexpression of the MRSA mvaS gene and site directed mutagenesis studies suggested its binding site and the mechanism of action.

PMID:33783142 | DOI:10.1002/cmdc.202100219