Heparan sulfate glucosamine 3-O-sulfotransferase 3B1 (HS3ST3B1)

Sulfotransferase that utilizes 3'-phospho-5'-adenylyl sulfate (PAPS) to catalyze the transfer of a sulfo group into an N- unsubstituted glucosamine connected to a 2-O-sulfo iduronic acid unit on heparan sulfate. Catalyzes the O-sulfation of glucosamine in IdoUA2S-GlcNS and also in IdoUA2S-GlcNH2.

The substrate-specific O-sulfation creates an enzyme-modified heparan sulfate which acts as a binding receptor into Herpes simplex virus-1 (HSV-1) and allows its entrance. Unlike 3-OST-1, does not convert non- anticoagulant heparan sulfate to anticoagulant heparan sulfate.