Predicted to enable ubiquitin protein ligase activity. Predicted to be involved in positive regulation of JNK cascade; positive regulation of proteasomal ubiquitin-dependent protein catabolic process; and protein autoubiquitination. Is expressed in several structures, including central nervous system; lung; metanephros; retina; and vibrissa. Orthologous to human SH3RF3 (SH3 domain containing ring finger 3). [provided by Alliance of Genome Resources, Apr 2022]