Introduction: B3GlcNAcT is a β-1,3-N-acetylglucosaminyltransferase that transfers glucosamine from UDP-glucosamine to the Galactosyl termini of acceptor molecules such as Lactose (Galβ1→4Glc), Lactosamine (Galβ1→4GlcNAc), O-glycans (Galβ1→3GalNAc), Lacto-N-biose (Galβ1→3GlcNAc), Galβ1→6GlcNAc, Galβ1→4Xylβ-o-Bn or Biantennary, Triantennary and Tetraantennary N-Glycans. It can function also as a Beta-(1,3)-N-Acetylgalactosaminyltransferase
Activity: Overnight incubation with 4 µL of this enzyme will produce 1 mg of product. If higher amount of product is needed the enzyme will continuously add GlcNAc for at least one week. Reaction conditions are: Donor: UDP-GLcNAc, substrate: pNP-Lactose, product: pNP-Lactose-GlcNAc, reaction temperature: 23 ºC , incubation time: 18 hours. The specific activity is 975.7 pmol/min/μg
Source: E. coli cells with a cloned bacterial B3GlcNAc Transferase gene.
Storage Buffer: The enzyme is provided as lyophilized powder solution containing Tris buffer and NaCl
Milliunit Definition: One milliUnit (mU) is defined as the amount of enzyme that catalyzes the formation of 1 nanomol of 4-Nitrophenyl β -D-lactopyranoside-GlcNAc from UDP-GlcNAc (Uridine diphosphate N-acetylglucosamine) and Galβ1→4Glcβ-O-pNP (4-Nitrophenyl β -D-lactopyranoside) per min at 25 °C and at pH 7.5.
Storage: Store at -20 °C >1 year. Avoid repeated freeze-thaw cycles, which decrease protein stability.