DNA polymerase (for the principal catalytic enzyme; the class may include DNA helicase, primase, DNA ligase, topoisomerase, etc., but DNA polymerase is most central)

Enzymes involved in cell replication and DNA synthesis are a diverse set of proteins essential for copying cellular genomes during division. The core components include DNA polymerases (which add nucleotides and proofread), DNA helicases (which unwind double helix), primases (which synthesize RNA primers), DNA ligases (which join DNA fragments), topoisomerases (which relieve torsional strain), and single-strand binding proteins (which stabilize unwound DNA)[1][3][4][5][7][9]. Each class contains multiple isoforms or families functioning in distinct roles, such as leading/lagging strand synthesis, proofreading, or repair. Because rapid DNA replication is a hallmark of cancer and infection, these enzymes are major therapeutic targets for anticancer chemotherapy, antiviral agents, and biochemical research tools. Inhibitors interfere at various replication stages, causing cell cycle arrest or apoptosis, but selectivity and toxicity remain primary clinical challenges. If a clinical or research application requires specific drug targeting or biomarker use, it is advisable to specify the precise enzyme (e.g., DNA polymerase δ, DNA topoisomerase IIα) rather than this broad category, which encompasses many unrelated proteins.

Other names

DNA replication enzymesDNA synthesis enzymesDNA replicase complexreplication enzymes

Inhibit nucleotide incorporation (nucleoside/nucleotide analogs); Interfere with chain elongation (chain terminators); Trap or poison enzyme-DNA complexes (topoisomerase poisons); Block unwinding of DNA (helicase inhibitors, theoretical/experimental); Inhibit RNA primer synthesis (primase inhibitors, experimental)