Predicted to enable ubiquitin protein ligase activity. Predicted to be involved in positive regulation of proteasomal ubiquitin-dependent protein catabolic process; proteasome-mediated ubiquitin-dependent protein catabolic process; and response to ionizing radiation. Located in Golgi membrane. Orthologous to human COP1 (COP1 E3 ubiquitin ligase). [provided by Alliance of Genome Resources, Apr 2022]