DNA and DNA-associated proteins

DNA and DNA-associated proteins, collectively known as chromatin, represent the structural and functional framework for genetic inheritance and gene expression in eukaryotic cells (StatPearls, 2023). This complex consists of the deoxyribonucleic acid (DNA) molecule itself and a diverse array of proteins, including histones that package DNA, topoisomerases that manage torsional strain, and polymerases responsible for replication and transcription (Nature Education, 2014). In many pathological states, especially oncology, the DNA-protein complex is a primary site of intervention; for instance, DNA damage response pathways are often exploited to induce apoptosis in rapidly dividing cancer cells (NIH, 2022). Drugs targeting this system include alkylating agents that form covalent bonds with DNA, intercalators that wedge between base pairs, and inhibitors of DNA-modifying enzymes like PARP or HDACs (PubChem, 2024). While these therapies are cornerstones of cancer treatment, they are frequently associated with significant side effects such as myelosuppression and the risk of secondary malignancies due to their non-specific effects on the genome of healthy cells (American Cancer Society, 2023).

Other names

ChromatinDeoxyribonucleic acid and associated proteinsNucleoprotein complexDNA-protein complex

Drugs targeting this complex act through DNA alkylation, DNA intercalation, inhibition of DNA synthesis, inhibition of topoisomerase enzymes, inhibition of DNA repair mechanisms (e.g., PARP inhibition), and epigenetic modification of histones (PubChem, 2024; NIH, 2022).