Bacterial resistance to sulfonamide antibiotics (sulfas) is mediated by acquisition of sul genes, which encode sulfa-insensitive versions of the target enzyme, dihydropteroate synthase. Here, Venkatesan et al. study Sul enzymes using biochemical, structural, mutational and functional analyses, revealing the molecular basis for Sul-mediated drug resistance.
- Meenakshi Venkatesan
- Michael Fruci
- Alexei Savchenko