Molecular function

Catalysis of the reaction: UDP-N-acetyl-D-galactosamine + glycoprotein-alpha-L-fucosyl-(1,2)-D-galactose = UDP + glycoprotein-N-acetyl-alpha-D-galactosaminyl-(1,3)-(alpha-L-fucosyl-(1,2))-D-galactose.

A transferase activity, A-transferase activity, UDP-GalNAc:Fucalpha1->2Galalpha1->3-N-acetylgalactosaminyltransferase activity, UDP-N-acetyl-D-galactosamine:alpha-L-fucosyl-1,2-D-galactose 3-N-acetyl-D-galactosaminyltransferase activity, UDP-N-acetyl-D-galactosamine:glycoprotein-alpha-L-fucosyl-(1,2)-D-galactose 3-N-acetyl-D-galactosaminyltransferase activity, alpha-3-N-acetylgalactosaminyltransferase activity, blood-group substance A-dependent acetylgalactosaminyltransferase activity, blood-group substance alpha-acetyltransferase activity, fucosylgalactose acetylgalactosaminyltransferase activity, fucosylgalactose alpha-N-acetylgalactosaminyltransferase activity, fucosylglycoprotein alpha-N-acetylgalactosaminyltransferase activity, histo-blood group A glycosyltransferase (Fucalpha1->2Galalpha1->3-N-acetylgalactosaminyltransferase), histo-blood group A transferase activity