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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Evernimicin (SCH27899) inhibits both translation and 50S ribosomal subunit formation in Staphylococcus aureus cells.

The effects of the everninomicin antibiotic evernimicin (SCH27899) on growing Staphylococcus aureus cells were investigated. Cellular growth rates and viable cell numbers decreased with increasing antibiotic concentrations. The rate of protein synthesis, measured as (35)S-amino acid incorporation, declined in parallel with the growth rate. Significantly, the formation of the 50S ribosomal subunit was inhibited in a dose-dependent fashion as well. 30S ribosomal subunit synthesis was not affected over the same concentration range. Evernimicin did not stimulate the breakdown of mature ribosomal subunits. Pulse-chase labeling experiments revealed a reduced rate of 50S subunit formation in drug-treated cells. Two erythromycin-resistant strains of S. aureus that carried the ermC gene were as sensitive as wild-type cells to antibiotic inhibition. In addition, two methicillin-resistant S. aureus organisms, one sensitive to erythromycin and one resistant to the macrolide, showed similar sensitivities to evernimicin. These results suggest a use for this novel antimicrobial agent against antibiotic-resistant bacterial infections.[1]


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