DNA-processing enzymes

DNA-processing enzymes are a broad and essential class of proteins that catalyze the synthesis, modification, and repair of DNA molecules to ensure genomic integrity and proper cellular function (Dutt, 2024). This category encompasses several key enzyme families, including DNA polymerases, which synthesize new DNA strands; topoisomerases, which manage DNA supercoiling and tangling; helicases, which unwind the double helix; and ligases, which join DNA fragments (Study.com, 2024). These enzymes are critical therapeutic targets in oncology, where inhibitors of topoisomerases (e.g., etoposide) or repair enzymes (e.g., PARP inhibitors) are used to induce lethal DNA damage in rapidly dividing cancer cells (RSC, 2024). Additionally, many antiviral and antibacterial drugs, such as acyclovir and ciprofloxacin, selectively target the DNA-processing machinery of pathogens to halt their replication (PMC, 2024). DNA-processing enzymes also play a role in epigenetic regulation through DNA methyltransferases, which are targeted by drugs like azacitidine to treat myelodysplastic syndromes (PMC, 2024). Because these enzymes are fundamental to all living cells, drugs targeting them must often balance efficacy against potential side effects like myelosuppression and genotoxicity (PMC, 2024). The development of resistance, often through mutations in the target enzymes or upregulation of alternative repair pathways, remains a significant challenge in the clinical use of these agents (RSC, 2024). Overall, this class of enzymes remains a cornerstone of modern pharmacology, providing diverse opportunities for treating hyperproliferative and infectious diseases (PMC, 2024).

Other names

DNA metabolism enzymesDNA modifying enzymesDNA replication and repair enzymesNucleic acid processing enzymes

Inhibition of DNA synthesis, induction of DNA strand breaks, inhibition of DNA repair pathways, or interference with DNA supercoiling.