SUMO-conjugating enzyme UBC9 is an alias for the gene, Ubiquitin conjugating enzyme E2I, in humans. Other names include: SUMO-conjugating enzyme UBC9; Ubiquitin carrier protein I; Ubiquitin-conjugating enzyme E2 I; Ubiquitin-protein ligase I ; SUMO-protein ligase; Ubiquitin carrier protein 9; C358B7.1; UBC9; ubiquitin-conjugating enzyme E2I. The encoded protein is an enzyme with an amino acid length of 158 and a mass of 18.0 kDa. Other isoforms may exist. SUMO-conjugating enzyme UBC9 is a member of the Ubiquitin-conjugating enzyme family. This gene shares homology with other species, including: Fly, Yeast, Arabidopsis, Zebrafish, Frog.