Transcriptional activator (PubMed:1547944). May play a role in keratinocyte differentiation (By similarity). Epididymis and brain. Sumoylated; enhanced upon ERK/MAP kinase pathway activation it positively regulates the transcriptional activator capacity. Sumoylation at Lys-95 probably requires phosphorylation at Ser-100. Transiently polysumoylated and desumoylated by SENP1. Sumoylation is a prerequisite to polyubiquitination which in turn increases proteasomal-mediated degradation. Probably polyubiquitinated by RNF4 and deubiquitinated by USP2. Belongs to the ETS family.