APE Proteins and Enzymes

Apurinic/Apyrimidinic Endonuclease (APE), also known as redox factor 1 (Ref-1), is a multifunctional enzyme involved in both DNA repair and transcription factor binding. The C-terminal region is responsible for base excision repair activities. This repair activity, however, is suppressed by phosphorylation. The N-terminal region of APE may regulate the DNA binding capabilities of a variety of transcription factors through redox stimulation.