Reaction catalyzed by ubiquitinyl hydrolase 1 (3.4.19.12)

	ubiquitin C-terminal-4-methyl-7-amido-coumarin	+		H2O	=			+
	ubiquitin C-terminal-4-methyl-7-amido-coumarin	+		H2O	=		ubiquitin	+		4-methyl-7-amino-coumarin