New inhibitors of the bacterial transferase MraY are described. Their structure is based on an aminoribosyl-O-uridine like scaffold, readily obtained in two key steps. The amino group can be coupled with proline or guanylated. Alternatively, these amino, prolinyl or guanidinyl groups can be introduced through a triazole linker. Biological evaluation of these compounds on MraY from Bacillus subtilis revealed interesting inhibitory activity for both amino compounds.
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http://dx.doi.org/10.1016/j.bmc.2010.04.023 | DOI Listing |
Bacteria can change morphology in response to stressors and changes in their environment, including infection of a host. We previously identified the bacterial species, , which uses nutrient-induced filamentation as a novel mechanism for cell-to-cell spreading in the intestinal epithelial cells of a nematode host. To further investigate the conservation of nutrient-induced filamentation in Bordetellae, we utilized the turkey-infecting species which filaments in vitro when switched from a standard growth media to an enriched media.
View Article and Find Full Text PDFProtein Sci
February 2025
Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada.
Polymyxins are last-resort antimicrobial peptides administered clinically against multi-drug resistant bacteria, specifically in the case of Gram-negative species. However, an increasing number of these pathogens employ a defense strategy that involves a relay of enzymes encoded by the pmrE (ugd) loci and the arnBCDTEF operon. The pathway modifies the lipid-A component of the outer membrane (OM) lipopolysaccharide (LPS) by adding a 4-amino-4-deoxy-l-arabinose (L-Ara4N) headgroup, which renders polymyxins ineffective.
View Article and Find Full Text PDFBiochemistry (Mosc)
December 2024
National Research Centre "Kurchatov Institute", Moscow, 123182, Russia.
Bacterial and viral RNA polymerases are promising targets for the development of new transcription inhibitors. One of the potential blockers of RNA synthesis is 7,8-dihydro-8-oxo-1,-ethenoadenine (oxo-εA), a synthetic compound that combines two adenine modifications: 8-oxoadenine and 1,-ethenoadenine. In this study, we synthesized oxo-εA triphosphate (oxo-εATP) and showed that it could be incorporated by the RNA-dependent RNA polymerase of SARS-CoV-2 into synthesized RNA opposite template residues A and G in the presence of Mn ions.
View Article and Find Full Text PDFToxics
January 2025
Research Group in Community Nutrition and Oxidative Stress (NUCOX), University of Balearic Islands, 07122 Palma de Mallorca, Spain.
Human activities increasingly threaten marine ecosystems through rising waste and temperatures. This study investigated the role of plastics as vectors for bacteria and the effects of temperature on the marine sponge . Samples of plastics and sponges were collected during July, August (high-temperature period), and November (lower-temperature period).
View Article and Find Full Text PDFToxins (Basel)
January 2025
School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
microorganisms play an important role in the zearalenone (ZEA) biotransformation process in natural environments. The phosphotransferase pathway in is both widespread and relatively well conserved. However, the reaction kinetics of these phosphotransferases remain poorly understood, and their catalytic activities are suboptimal.
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