Targeting Bacillosamine Biosynthesis in Bacterial Pathogens: Development of Inhibitors to a Bacterial Amino-Sugar Acetyltransferase from Campylobacter Jejuni
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Author(s)
Ciulli, Alessio
De Schutter, Joris
Morrison, James P.
Morrison, Michael James
Imperiali, Barbara
Date Issued
March 2017
Journal
Journal of Medicinal Chemistry
Publisher
American Chemical Society (ACS)
Citation
De Schutter, Joris W. et al. “Targeting Bacillosamine Biosynthesis in Bacterial Pathogens: Development of Inhibitors to a Bacterial Amino-Sugar Acetyltransferase from Campylobacter Jejuni.” Journal of Medicinal Chemistry 60, 5 (February 2017): 2099–2118 © 2017 American Chemical Society
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Author's final manuscript
Abstract
The glycoproteins of selected microbial pathogens often include highly modified carbohydrates such as 2,4-diacetamidobacillosamine (diNAcBac). These glycoconjugates are involved in host-cell interactions and may be associated with the virulence of medically significant Gram-negative bacteria. In light of genetic studies demonstrating the attenuated virulence of bacterial strains in which modified carbohydrate biosynthesis enzymes have been knocked out, we are developing small molecule inhibitors of selected enzymes as tools to evaluate whether such compounds modulate virulence. We performed fragment-based and high-throughput screens against an amino-sugar acetyltransferase enzyme, PglD, involved in biosynthesis of UDP-diNAcBac in Campylobacter jejuni. Herein we report optimization of the hits into potent small molecule inhibitors (IC 50 < 300 nM). Biophysical characterization shows that the best inhibitors are competitive with acetyl coenzyme A and an X-ray cocrystal structure reve als that binding is biased toward occupation of the adenine subpocket of the AcCoA binding site by an aromatic ring.
MIT Department
Massachusetts Institute of Technology. Department of Biology
Massachusetts Institute of Technology. Department of Chemistry
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DOI of Published Version
https://doi.org/10.1021/ACS.JMEDCHEM.6B01869
