Reaction catalyzed by phosphatidylinositol-3,4,5-trisphosphate 5-phosphatase (3.1.3.86)

		+		H2O	=			+
	1D-myo-inositol 1,3,4,5-tetrakisphosphate	+		H2O	=		1-phosphatidyl-1D-myo-inositol 1,3,4-trisphosphate	+		phosphate