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Wright A, Deane-Alder K, Marschall E, Bamert R, Venugopal H, Lithgow T, Lupton DW, Belousoff MJ. Characterization of the Core Ribosomal Binding Region for the Oxazolidone Family of Antibiotics Using Cryo-EM. ACS Pharmacol Transl Sci 2020; 3:425-432. [PMID: 32566908 DOI: 10.1021/acsptsci.0c00041] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Indexed: 01/02/2023]
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.
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Affiliation(s)
- Alexander Wright
- School of Chemistry, Monash University, Wellington Road, Clayton, 3800 Victoria, Australia
| | - Kieran Deane-Alder
- Drug and Development Biology, Monash Institute of Pharmaceutical Sciences, Monash University, 399 Royal Parade, Parkville, 3052 Victoria, Australia
| | - Edward Marschall
- Department of Biochemistry and Molecular Biology, Monash University, Wellington Road, Clayton, 3800 Victoria, Australia
| | - Rebecca Bamert
- Infection & Immunity Program, Monash Biomedicine Discovery Institute and Department of Microbiology, Monash University, Wellington Road, Clayton, 3800 Victoria, Australia
| | - Hari Venugopal
- Ramaciotti Center for Cryo-Electron Microscopy, Monash University, Wellington Road, Clayton, 3800 Victoria, Australia
| | - Trevor Lithgow
- Infection & Immunity Program, Monash Biomedicine Discovery Institute and Department of Microbiology, Monash University, Wellington Road, Clayton, 3800 Victoria, Australia
| | - David W Lupton
- School of Chemistry, Monash University, Wellington Road, Clayton, 3800 Victoria, Australia
| | - Matthew J Belousoff
- Drug and Development Biology, Monash Institute of Pharmaceutical Sciences, Monash University, 399 Royal Parade, Parkville, 3052 Victoria, Australia
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