Poly [ADP-ribose] polymerase 4 is an enzyme that in humans is encoded by the PARP4gene.[5][6]
This gene encodes poly(ADP-ribosyl)transferase-like 1 protein, which is capable of catalyzing a poly(ADP-ribosyl)ation reaction. This protein has a catalytic domain which is homologous to that of poly (ADP-ribosyl) transferase, but lacks an N-terminal DNA binding domain which activates the C-terminal catalytic domain of poly (ADP-ribosyl) transferase. Since this protein is not capable of binding DNA directly, its transferase activity may be activated by other factors such as protein-protein interaction mediated by the extensive carboxyl terminus.[6]
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Liu TJ, Lin SY, Chau YP (2002). "Inhibition of poly(ADP-ribose) polymerase activation attenuates beta-lapachone-induced necrotic cell death in human osteosarcoma cells". Toxicol. Appl. Pharmacol. 182 (2): 116–25. doi:10.1006/taap.2002.9438. PMID12140175.
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