Characterization of the Core Ribosomal Binding Region for the Oxazolidone Family of Antibiotics Using Cryo-EM

Alexander Wright, Kieran Deane-Alder, Edward Marschall, Rebecca Bamert, Hari Venugopal, Trevor Lithgow, David W. Lupton, Matthew J. Belousoff

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Linezolid and tedizolid are oxazolidinones with established clinical utility for the treatment of Gram-positive pathogens. Over time it has become apparent that even modest structural changes to the core phenyl oxazolidinone leads to drastic changes in biological activity. Consequently, the structure–activity relationship around the core oxazolidinone is constantly evolving, often reflected with new structural motifs present in nascent oxazolidinones. Herein we describe the use of cryo-electron microscopy to examine the differences in binding of several functionally different oxazolidinones in the hopes of enhanced understanding of their SAR. Tedizolid, radezolid, T145, and contezolid have been examined within the peptidyl transferase center (PTC) of the 50S ribosomal subunit from methicillin resistant Staphylococcus aureus. The ribosome–antibiotic complexes were resolved to a resolution of around 3 Å enabling unambiguous assignment of how each antibiotic interacts with the PTC.
Original languageEnglish
Pages (from-to)425-432
Number of pages8
JournalACS Pharmacology & Translational Science
Volume3
Issue number3
DOIs
Publication statusPublished - 12 Jun 2020

Keywords

  • antibiotics
  • linezolid
  • contezolid
  • oxazolidinones
  • cryo-EM
  • ribosome

Cite this