DNA synthesis and associated enzymes

DNA synthesis and associated enzymes represent the collective molecular machinery required for the accurate replication and repair of cellular DNA. This group includes critical enzymes such as DNA polymerases, which catalyze the addition of nucleotides; helicases, which unwind the double helix; and topoisomerases, which manage DNA supercoiling during replication (StatPearls, NBK536946). These enzymes are fundamental to cell proliferation and are frequently exploited as therapeutic targets in oncology and infectious diseases (National Cancer Institute, Chemotherapy). In cancer therapy, drugs like antimetabolites (e.g., 5-fluorouracil) and topoisomerase inhibitors (e.g., etoposide) disrupt these processes to induce apoptosis in rapidly dividing cells (PubChem, CID 3385). Similarly, many antiviral and antibacterial agents function by selectively inhibiting the DNA synthesis machinery of pathogens (NCBI, PMC7150111). However, the lack of absolute specificity for diseased cells often leads to side effects in healthy, rapidly dividing tissues like the bone marrow and gut (StatPearls, NBK536946). This target class remains a cornerstone of chemotherapy despite the emergence of more targeted biologics.

Other names

DNA replication machineryDNA metabolic enzymesReplisomeDNA synthesis pathway

Inhibition of nucleotide precursor synthesis, direct inhibition of DNA polymerases, induction of DNA strand breaks via topoisomerase poisoning, and incorporation of fraudulent nucleotides leading to chain termination.