Predicted to enable ubiquitin conjugating enzyme binding activity and ubiquitin protein ligase activity. Predicted to be involved in ubiquitin-dependent protein catabolic process. Predicted to act upstream of or within protein ubiquitination. Predicted to be part of ubiquitin ligase complex. Predicted to be active in cytoplasm. Orthologous to human ARIH2 (ariadne RBR E3 ubiquitin protein ligase 2).