Enables ubiquitin-protein transferase activity. Predicted to be involved in proteasome-mediated ubiquitin-dependent protein catabolic process; protein K48-linked ubiquitination; and protein K63-linked ubiquitination. Predicted to act upstream of or within cellular protein catabolic process. Orthologous to human UBE2G1 (ubiquitin conjugating enzyme E2 G1). [provided by Alliance of Genome Resources, Apr 2022]