Predicted to enable ubiquitin protein ligase activity and ubiquitin protein ligase binding activity. Predicted to be involved in positive regulation of vasculogenesis and protein autoubiquitination. Predicted to be part of Cul2-RING ubiquitin ligase complex and Cul5-RING ubiquitin ligase complex. Orthologous to human ASB4 (ankyrin repeat and SOCS box containing 4). [provided by Alliance of Genome Resources, Apr 2022]