Mediates E3-dependent ubiquitination and proteasomal degradation of target proteins, including p53/TP53, HDAC1 and p27Kip1. Preferentially acts on tetrameric p53/TP53. Contributes to the regulation of p27Kip1 and p53/TP53 levels, and thereby contributes to the regulation of the cell cycle progression. Increases AR transcription factor activity. Monomer and homodimer. Interacts with AR, p53/TP53, MDM2, HDAC1, KAT5, PLAG1, PLAGL2, p27Kip1, COPE, UBE2D2 and GORAB/NTKLBP1. Up-regulated during the S phase of the cell cycle. Expressed at low levels during G phase. 3 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Molecular Function: p53 binding; protein binding; protein homodimerization activity; ubiquitin-protein ligase activity; zinc ion binding
Biological Process: positive regulation of proteasomal ubiquitin-dependent protein catabolic process; positive regulation of protein ubiquitination; protein ubiquitination; protein ubiquitination during ubiquitin-dependent protein catabolic process