Reaction catalyzed by tRNA 2-selenouridine synthase (2.9.1.3)

	5-methylaminomethyl-2-(Se-phospho)selenouridine34 in tRNA	+		H2O	=		5-methylaminomethyl-2-selenouridine34 in tRNA	+
	5-methylaminomethyl-2-(Se-phospho)selenouridine34 in tRNA	+		H2O	=		5-methylaminomethyl-2-selenouridine34 in tRNA	+		phosphate