Probably involved in the breakdown of mucin-type O-linked glycans. Specifically removes the T-antigen disaccharide (Gal-beta-1,3-GalNAc-alpha) from extracellular host glycoproteins. H2O + O(3)-[beta-D-galactosyl-(1->3)-N-acetyl-alpha-D-galactosaminyl]-L-threonyl-[protein] = beta-D-galactosyl-(1->3)-N-acetyl-D-galactosamine + L-threonyl-[protein] H2O + O(3)-[beta-D-galactosyl-(1->3)-N-acetyl-alpha-D-galactosaminyl]-L-seryl-[protein] = beta-D-galactosyl-(1->3)-N-acetyl-D-galactosamine + L-seryl-[protein] The hydrolysis reaction proceeds with retention of the anomeric configuration. Belongs to the glycosyl hydrolase 101 family. A subfamily. The sequence shown here is a temptative reconstruction from the four submitted CDS; the exact positions of the frameshifts are unsure. Produces separate ORFs. Produces separate ORFs. Produces separate ORFs. Extended N-terminus. Produces separate ORFs.