Is predicted to encode a protein with the following domains: Ubiquitin-conjugating enzyme; Ubiquitin-conjugating enzyme E2; and Ubiquitin-conjugating enzyme/RWD-like. Is an ortholog of C. elegans ubc-18. In C. elegans, ubc-18 is involved in several processes, including determination of adult lifespan; embryonic digestive tract morphogenesis; and ubiquitin-dependent protein catabolic process.