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 let-70. In C. elegans, let-70 is involved in programmed cell death involved in cell development; protein ubiquitination; and ubiquitin-dependent protein catabolic process.