Reaction catalyzed by [heparan sulfate]-glucosamine 3-sulfotransferase 1 (2.8.2.23), [heparan sulfate]-glucosamine 3-sulfotransferase 2 (2.8.2.29), [heparan sulfate]-glucosamine 3-sulfotransferase 3 (2.8.2.30)

		+			=			+
	3'-phosphoadenylyl sulfate	+		[heparan sulfate]-glucosamine	=		adenosine 3',5'-bisphosphate	+		[heparan sulfate]-glucosamine 3-sulfate