“…While Class B enzymes can only catalyze transpeptidation, Class A enzymes have an N-terminal transglycosylation site as well, making them capable of catalyzing both reactions. 4,14,15 Besides PBPs, monofunctional glycosyl transferases (MGTs), enzymes with non-PBP-related transglycosylation activity, have been discovered in several Gram-positive and -negative organisms. 16 However, because of their high degree of similarity, they are likely to be sensitive to the same inhibitors.…”