Functions as an E3 ubiquitin-protein ligase and as an E3 SUMO1-protein ligase. Probable tumor suppressor involved in cell growth, cell proliferation and apoptosis that regulates 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.
E3 ubiquitin-protein ligase Topors; p53-binding protein 3; RING-type E3 ubiquitin transferase Topors; SUMO1-protein E3 ligase Topors; topoisomerase I binding, arginine/serine-rich, E3 ubiquitin protein ligase; Topoisomerase I-binding arginine/serine-rich protein; Topoisomerase I-binding RING finger protein; Tumor suppressor p53-binding protein 3