Author/Authors :
Ting-Bo Jiang، نويسنده , , Deming Xu، نويسنده , , John Allocco، نويسنده , , Craig Parish، نويسنده , , John Davison، نويسنده , , Karynn Veillette، نويسنده , , Susan Sillaots، نويسنده , , Wenqi Hu، نويسنده , , Roberto Rodriguez-Suarez، نويسنده , , Steve Trosok، نويسنده , , Li Zhang، نويسنده , , Yang Li، نويسنده , , Fariba Rahkhoodaee، نويسنده , , Tara Ransom، نويسنده , , Nick Martel، نويسنده , , Hao Wang، نويسنده , , Daniel Gauvin، نويسنده , , Judyann Wiltsie، نويسنده , , D، نويسنده ,
Abstract :
Natural products provide an unparalleled source of chemical scaffolds with diverse biological activities and have profoundly impacted antimicrobial drug discovery. To further explore the full potential of their chemical diversity, we survey natural products for antifungal, target-specific inhibitors by using a chemical-genetic approach adapted to the human fungal pathogen Candida albicans and demonstrate that natural-product fermentation extracts can be mechanistically annotated according to heterozygote strain responses. Applying this approach, we report the discovery and characterization of a natural product, parnafungin, which we demonstrate, by both biochemical and genetic means, to inhibit poly(A) polymerase. Parnafungin displays potent and broad spectrum activity against diverse, clinically relevant fungal pathogens and reduces fungal burden in a murine model of disseminated candidiasis. Thus, mechanism-of-action determination of crude fermentation extracts by chemical-genetic profiling brings a powerful strategy to natural-product-based drug discovery.
