Genetic analysis of epistasis between nucleotide excision repair and homologous recombination in the recovery of persisters after fluoroquinolone treatment.

Deletion of recA, uvrA, uvrB, mfd, uvrD, recB, and recC genes reveals complex epistatic interactions in fluoroquinolone persister recovery in Escherichia coli.

• Why it matters: Understanding how DNA repair pathways contribute to bacterial persistence after antibiotic treatment is crucial for developing strategies to combat persistent infections and antibiotic resistance.
• What they did: The study used gene deletions of DNA repair enzymes interacting with RecA or UvrD to investigate their roles in persister recovery, focusing on epistatic interactions and specific functional domains.
• The result: Findings show that HR and NER pathways contribute to persister recovery, with RecA and UvrD playing key roles through their recombination and helicase functions, respectively.