Bacterial DNA synthesis pathway

The bacterial DNA synthesis pathway encompasses the entire coordinated sequence of molecular events required to accurately duplicate the bacterial chromosome prior to cell division[3][7]. This process is mediated by the coordinated action of an array of enzymes and protein complexes commonly referred to as the "replisome," including DNA polymerase III (responsible for the bulk of DNA synthesis), DNA gyrase and topoisomerase IV (resolve topological stress by introducing or removing supercoils), helicase (DnaB), primase (DnaG, for RNA primer synthesis), and several accessory proteins such as single-stranded DNA binding protein, clamp loader, and ligase[5][7]. Drugs targeting this pathway typically block one or more essential enzymatic reactions, resulting in inhibition of bacterial cell proliferation. The pathway is a major antibacterial drug target, although effective therapeutic exploitation requires specificity for bacterial enzymes over their eukaryotic counterparts to minimize host toxicity. Note: For therapeutic development, it is best practice to reference specific molecular targets (e.g., "DNA gyrase") rather than the entire pathway, which is a functional grouping and not a discrete molecule[4][7].

Other names

Bacterial DNA replication pathwayBacterial DNA replication machineryBacterial DNA replication

Inhibition of DNA gyrase/topoisomerase II: blocks supercoiling and uncoiling, halting DNA replication. Inhibition of DNA polymerase III: prevents DNA chain elongation. Inhibition of DNA primase or helicase: blocks primer synthesis or DNA strand separation. Formation of DNA adducts: crosslinks DNA, preventing replication and transcription.