Bifunctional heparan sulfate N-deacetylase/N-sulfotransferase 3 (NDST3)

Essential bifunctional enzyme that catalyzes both the N- deacetylation and the N-sulfation of glucosamine (GlcNAc) of the glycosaminoglycan in heparan sulfate. Modifies the GlcNAc-GlcA disaccharide repeating sugar backbone to make N-sulfated heparosan, a prerequisite substrate for later alterations in heparin biosynthesis.

Has high deacetylase activity but low sulfotransferase activity. .