E3 ubiquitin-protein ligase that mediates ubiquitination of p53/
TP53, leading to its degradation by the proteasome. Inhibits p53/
TP53- and p73/
TP73-mediated cell cycle arrest and apoptosis by binding its transcriptional activation domain. Also acts as a ubiquitin ligase E3 toward itself and
ARRB1. Permits the nuclear export of p53/
TP53. Promotes proteasome-dependent ubiquitin-independent degradation of retinoblastoma
RB1 protein. Inhibits
DAXX-mediated apoptosis by inducing its ubiquitination and degradation. Component of the
TRIM28/KAP1-
MDM2-p53/
TP53 complex involved in stabilizing p53/
TP53. Also component of the
TRIM28/KAP1-
ERBB4-
MDM2 complex which links growth factor and DNA damage response pathways. Mediates ubiquitination and subsequent proteasome degradation of
DYRK2 in nucleus. Ubiquitinates
IGF1R and
SNAI1 and promotes them to proteasomal degradation (PubMed:12821780, PubMed:15053880, PubMed:15195100, PubMed:15632057, PubMed:16337594, PubMed:17290220, PubMed:19098711, PubMed:19219073, PubMed:19837670, PubMed:19965871, PubMed:20173098, PubMed:20385133, PubMed:20858735, PubMed:22128911). Ubiquitinates
DCX, leading to
DCX degradation and reduction of the dendritic spine density of olfactory bulb granule cells (By similarity). Ubiquitinates
DLG4, leading to proteasomal degradation of
DLG4 which is required for AMPA receptor endocytosis.
UniProt