Small-molecule targeting of a diapophytoene desaturase inhibits S. aureus virulence

Nature Chemical Biology
Feifei ChenLefu Lan

Abstract

The surge of antibiotic resistance in Staphylococcus aureus has created a dire need for innovative anti-infective agents that attack new targets, to overcome resistance. In S. aureus, carotenoid pigment is an important virulence factor because it shields the bacterium from host oxidant killing. Here we show that naftifine, a US Food and Drug Administration (FDA)-approved antifungal drug, blocks biosynthesis of carotenoid pigment at nanomolar concentrations. This effect is mediated by competitive inhibition of S. aureus diapophytoene desaturase (CrtN), an essential enzyme for carotenoid pigment synthesis. We found that naftifine attenuated the virulence of a variety of clinical S. aureus isolates, including methicillin-resistant S. aureus (MRSA) strains, in mouse infection models. Specifically, we determined that naftifine is a lead compound for potent CrtN inhibitors. In sum, these findings reveal that naftifine could serve as a chemical probe to manipulate CrtN activity, providing proof of concept that CrtN is a druggable target against S. aureus infections.

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Citations

Jul 28, 2016·ACS Applied Materials & Interfaces·Ming YuJingye Li
Jul 4, 2019·Medicinal Research Reviews·Shuaishuai NiJian Li
Jun 18, 2020·International Journal of Molecular Sciences·Paweł KwiatkowskiBarbara Dołęgowska
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