DNA damage response protein (DDR protein (generic; specific proteins like ATM, ATR, BRCA1, p53, etc., have established abbreviations))

DNA damage response proteins are a large class of cellular proteins engaged in recognizing, signaling, and repairing DNA lesions to maintain genome stability. The collective "DNA damage response" (DDR) includes damage sensors (e.g., ATM, ATR), signal transducers (e.g., CHK1, CHK2), repair effectors (e.g., BRCA1, RAD51), and cell fate regulators (e.g., p53), orchestrating pathways such as cell cycle arrest, DNA repair, apoptosis, and immune signaling. DDR proteins are central to cancer biology, since their dysfunction predisposes to tumorigenesis, and they are major therapeutic targets, especially in oncology, where drugs targeting DDR pathways (e.g., PARP inhibitors) exploit synthetic lethality in deficient tumor cells[1][4][5]. Because the term covers a vast protein network rather than a single root entity, it is a functional classification but not a singular, specific drug target.

Other names

DNA damage response factorDDR componentDNA repair proteingenome integrity maintenance protein

Inhibition of DNA repair (synthetic lethality, particularly with PARP inhibitors in BRCA1/2-deficient tumors); Blockade of checkpoint activation to sensitize cancer cells to DNA-damaging treatments; Induction of DNA damage to trigger apoptosis in tumor cells