Glycosyltransferase family 28 N-terminal domain. The glycosyltransferase family 28 includes monogalactosyldiacylglycerol synthase (EC 2.4.1.46) and UDP-N-acetylglucosamine transferase (EC 2.4.1.-). This N-terminal domain contains the acceptor binding site and likely membrane association site. This family also contains a large number of proteins that probably have quite distinct activities.

undecaprenyldiphospho-muramoylpentapeptide beta-N-acetylglucosaminyltransferase. RM 8449890 RT The final step of peptidoglycan subunit assembly in Escherichia coli occurs in the cytoplasm. RA Bupp K, van Heijenoort J. RL J Bacteriol 1993 Mar;175(6):1841-3 [Cell envelope, Biosynthesis and degradation of murein sacculus and peptidoglycan].

UDP-N-acetylglucosamine:LPS N-acetylglucosamine transferase [Cell envelope biogenesis, outer membrane]

undecaprenyldiphospho-muramoylpentapeptide beta-N- acetylglucosaminyltransferase; Provisional

MurG is an N-acetylglucosaminyltransferase, the last enzyme involved in the intracellular phase of peptidoglycan biosynthesis. It transfers N-acetyl-D-glucosamine (GlcNAc) from UDP-GlcNAc to the C4 hydroxyl of a lipid-linked N-acetylmuramoyl pentapeptide (NAM). The resulting disaccharide is then transported across the cell membrane, where it is polymerized into NAG-NAM cell-wall repeat structure. MurG belongs to the GT-B structural superfamily of glycoslytransferases, which have characteristic N- and C-terminal domains, each containing a typical Rossmann fold. The two domains have high structural homology despite minimal sequence homology. The large cleft that separates the two domains includes the catalytic center and permits a high degree of flexibility.