Bacterial deoxyribonucleic acid (Bacterial DNA) (DNA)

Bacterial deoxyribonucleic acid (DNA) is the primary carrier of genetic information in bacteria, typically organized as a single circular chromosome located in the nucleoid region, often accompanied by extrachromosomal plasmids (National Center for Biotechnology Information [NCBI], 2023). It serves as the template for DNA replication and RNA transcription, processes essential for bacterial growth, metabolism, and reproduction (StatPearls, Physiology, Bacteria, 2023). As a therapeutic target, bacterial DNA is exploited by several classes of antibiotics that achieve selective toxicity by targeting bacterial-specific enzymes or through the metabolic activation of prodrugs within the bacterial cell (PubMed, PMID: 25813469). For instance, fluoroquinolones inhibit DNA gyrase and topoisomerase IV, preventing the relaxation of supercoiled DNA and halting replication (StatPearls, Fluoroquinolones, 2023). Other agents, such as metronidazole, are reduced to reactive radicals that cause direct oxidative damage and strand scission of the DNA molecule (StatPearls, Metronidazole, 2023). While highly effective, drugs targeting bacterial DNA face significant challenges, including the rapid emergence of resistance through mutations in target enzymes or efflux pumps, and potential side effects such as the disruption of the host's healthy microbiome (Nature Reviews Microbiology, 2017).

Other names

Bacterial genomeBacterial chromosomeBacterial nucleic acidsPlasmid DNA

Inhibition of DNA topoisomerases (DNA gyrase and Topoisomerase IV) which prevents DNA supercoiling and replication, and the generation of reactive oxygen species or nitroso radicals that cause direct DNA strand scission (StatPearls, 2023; PubMed, PMID: 25813469).