E3 ubiquitin-protein ligase Topors (TOPORS)

Functions as an E3 ubiquitin-protein ligase as Well as an E3 SUMO1-protein ligase.

Probable tumor suppressor involved in cell growth, cell proliferation and apoptosis that modulates p53/TP53 stability through ubiquitin-dependent degradation.

May regulate chromatin modification through sumoylation of several chromatin modification-associated proteins. May be involved in DNA damage- induced cell death through IKBKE sumoylation.