ubiquitin-like protein transferase activity ubiquitin-like protein conjugating enzyme activity Isoenergetic transfer of a ubiquitin-like protein (ULP) from one protein to another molecule, usually another protein, via the reaction X-SCP + Y = Y-SCP + X, where both the X-SCP and Y-SCP linkages are thioester bonds between the C-terminal amino acid of SCP and a sulfhydryl side group of a cysteine residue. small conjugating protein conjugating enzyme activity E2 GO:0061650 dph 2014-11-06T13:15:27Z molecular_function