title: Mechanism of action of the novel aminomethylcycline antibiotic omadacycline.
abstract: Omadacycline is a novel first-in-class aminomethylcycline with potent activity against important skin and pneumonia pathogens, including community-acquired methicillin-resistant Staphylococcus aureus (MRSA), β-hemolytic streptococci, penicillin-resistant Streptococcus pneumoniae, Haemophilus influenzae, and Legionella. In this work, the mechanism of action for omadacycline was further elucidated using a variety of models. Functional assays demonstrated that omadacycline is active against strains expressing the two main forms of tetracycline resistance (efflux and ribosomal protection). Macromolecular synthesis experiments confirmed that the primary effect of omadacycline is on bacterial protein synthesis, inhibiting protein synthesis with a potency greater than that of tetracycline. Biophysical studies with isolated ribosomes confirmed that the binding site for omadacycline is similar to that for tetracycline. In addition, unlike tetracycline, omadacycline is active in vitro in the presence of the ribosomal protection protein Tet(O).
authors.affiliation: Paratek Pharmaceuticals, Inc., Boston, MA, USA.
authors.forename: Michael P
authors.initials: MP
authors.lastname: Draper
authors.forename: S
authors.initials: S
authors.lastname: Weir
authors.forename: A
authors.initials: A
authors.lastname: Macone
authors.forename: J
authors.initials: J
authors.lastname: Donatelli
authors.forename: C A
authors.initials: CA
authors.lastname: Trieber
authors.forename: S K
authors.initials: SK
authors.lastname: Tanaka
authors.forename: Stuart B
authors.initials: SB
authors.lastname: Levy
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects; D014176:Protein Biosynthesis / Q000187:drug effects; D012270:Ribosomes / Q000187:drug effects; D013753:Tetracycline Resistance; D013754:Tetracyclines / Q000494:pharmacology*
chemical_list: D000900:Anti-Bacterial Agents; D013754:Tetracyclines; C000591640:omadacycline
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