Scheme 3.
One-pot four-enzyme galactosylation system for the synthesis of T-MUC1 glycopeptide from Tn-MUC1. Enzymes used: EcGalK, Escherichia coli galactokinase; BLUSP, Bifidobacterium longum UDP-sugar pyrophosphorylase; PmPpA, Pasteurella multocida inorganic pyrophosphatase; CjCgtBΔ30-His6) mutant, Campylobacter jejuni β1–3-galactosyltransferase mutant.