Mechanisms of fusidic acid resistance.

ABSTRACT: Fusidic acid (FA) is an antibiotic used to treat staphylococcal infections, particularly Staphylococcus aureus. It acts by inhibiting protein synthesis through locking elongation factor G (EF-G) to the ribosome. In S. aureus, there are three mechanisms of resistance. Mutations in the antibiotic target, EF-G (fusA), are common. These mutations affect the FA binding or the stability of the FA-locked state of EF-G but, due to effects on the normal function of EF-G, impose a fitness cost for the pathogen. The most common mechanism, FusB-type, involves expression of a resistance protein, FusB or FusC (FusD or FusF in other staphylococci), that provides target protection. The resistance protein binds to EF-G in its FA-locked state and mediates its release from the ribosome. An uncommon resistanc

SUBMITTER: Gonzalez-Lopez A 

PROVIDER: S-EPMC12493156 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature