Abstract
The adenovirus E2 promoter-binding factor-1 (E2F1) induces apoptosis in response to DNA damage and serum starvation. After DNA damage, E2F1 is phosphorylated by ataxia telangiectasia-mutated (ATM) kinase to promote apoptosis. However, precisely how serum starvation stimulates E2F1-induced apoptosis is unclear. We recently found that serum starvation reduces E2F1 poly(ADP-ribosyl)ation, thereby releasing a proapoptotic protein, bridging integrator-1 (BIN1), into the cytoplasm.