Here, the authors show that delafloxacin, a respiratory antibacterial fluoroquinolone, binds the Streptococcus pneumoniae topoisomerase IV-DNA cleavage complex in a distinct tilted-ring conformation involving multiple Mg2 + , K+ and water links. Intrinsic target affinity likely contributes to activity against quinolone-resistant bacteria.
- Shabir Najmudin
- Xiao-Su Pan
- Mark R. Sanderson