Beta-1,3-N-acetylglucosaminyltransferase that synthesizes the core 3 structure of the O-glycan, an important precursor in the biosynthesis of mucin-type glycoproteins. Plays an important role in the synthesis of mucin-type O-glycans in digestive organs.
Subcellular locations: Golgi apparatus membrane
Present in stomach and colon (at protein level). Restricted in the stomach, colon and small intestine, where core 3 structure is present.