label: SUMO conjugating enzyme activity
label_lc: sumo conjugating enzyme activity
description: "Isoenergetic transfer of SUMO from one protein to another via the reaction X-SUMO + Y = Y-SUMO + X, where both the X-SUMO and Y-SUMO linkages are thioester bonds between the C-terminal amino acid of SUMO and a sulfhydryl side group of a cysteine residue."