Sequence-specific DNA-binding protein that interacts with inducible viral and cellular enhancer elements to regulate transcription of selected genes. AP-2 factors bind to the consensus sequence 5'-GCCNNNGGC-3' and activate genes involved in a large spectrum of important biological functions. Binds DNA as a dimer. Can form homodimers or heterodimers with other AP-2 family members (By similarity). Belongs to the AP-2 family.