Recombinant Human CHST2 Protein, CF

The CHST family is comprised of 14 genes in both human and mouse. All members of this family are Golgi-localized type II membrane proteins. Only the luminal and enzymatic domain is expressed in each of our recombinant CHST proteins. These enzymes transfer sulfate (i.e., sulfonate) onto the 6-O or 4-O positions of GalNAc, Gal and GlcNAc residues on glycoproteins, proteoglycans and glycolipids (1). This sulfation often creates specific epitopes that can be recognized by extracellular matrix proteins, cell surface receptors and viruses (2). Human CHST2, also known as N-acetylglucosamine-6-O-sulfotransferase 1 (GlcNAc6ST-1) and Gal/GalNAc/GlcNAc 6-O-sulfotransferase (GST-2), was previously shown to act on non-reducing GlcNAc residues (3). The enzyme is known to be involved in biosynthesis of L-selectin ligand sialyl 6-sulfo Lewis X (4) and therefore plays a role in lymphocyte homing (5).The enzymatic activity of the recombinant human CHST2 was measured using a phosphatase-coupled assay (6).