Dataset Information


The C7-aminomethylpyrrolidine group rescues the activity of a thio-fluoroquinolone.

ABSTRACT: A Mg2+-water bridge between the C-3, C-4 diketo moiety of fluoroquinolones and the conserved amino acid residues in the GyrA/ParC subunit is critical for the binding of a fluoroquinolone to a topoisomerase-DNA covalent complex. The fluoroquinolone UING-5-249 (249) can bind to the GyrB subunit through its C7-aminomethylpyrrolidine group. This interaction is responsible for enhanced activities of 249 against the wild type and quinolone-resistant mutant topoisomerases. To further evaluate the effects of the 249-GyrB interaction on fluoroquinolone activity, we examined the activities of decarboxy- and thio-249 against DNA gyrase and conducted docking studies using the structure of a gyrase-ciprofloxacin-DNA ternary complex. We found that the 249-GyrB interaction rescued the activity of thio-249 but not that of decarboxy-249. A C7-group that binds more strongly to the GyrB subunit may allow for modifications at the C-4 position, leading to a novel compound that is active against the wild type and quinolone-resistant pathogens.

PROVIDER: S-EPMC6462232 | BioStudies |

REPOSITORIES: biostudies

Similar Datasets

| S-EPMC4007428 | BioStudies
| S-EPMC3147658 | BioStudies
| S-EPMC3318379 | BioStudies
| S-EPMC3299416 | BioStudies
| S-EPMC3318526 | BioStudies
| S-EPMC4763791 | BioStudies
| S-EPMC4538543 | BioStudies
| S-EPMC7366635 | BioStudies
1996-01-01 | S-EPMC163415 | BioStudies
| S-EPMC4273985 | BioStudies