HS3ST1 is a symbol for the gene, Heparan sulfate-glucosamine 3-sulfotransferase 1, in humans. Other names include: Heparan sulfate glucosamine 3-O-sulfotransferase 1; Heparan sulfate D-glucosaminyl 3-O-sulfotransferase 1; 3-OST-1; Heparan sulfate 3-O-sulfotransferase 1; h3-OST-1; Heparan sulfate glucosamine 3-O-sulfotransferase 1 ; 3OST; 3OST1; heparan sulfate (glucosamine) 3-O-sulfotransferase 1. The encoded protein is an enzyme with an amino acid length of 307 and a mass of 35.8 kDa. Other isoforms may exist. HS3ST1 is a member of the Sulfotransferase 1 family. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.