N-acetylglucosaminyltransferase, MurG (IPR006009)

Short name: GlcNAc_MurG

Overlapping homologous superfamilies


Family relationships



The murG gene of Escherichia coli encodes the N-acetylglucosaminyltransferase, UDP-N-acetylglucosamine--N-acetylmuramyl-(pentapeptide) pyrophosphoryl-undecaprenol N-acetylglucosamine transferase, responsible for the final step in the formation of the lipid-linked disaccharide-pentapeptide subunit of peptidoglycan [PMID: 12455415]. 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. The enzyme is peripherally associated with the inner face of the cytoplasmic membrane. Therefore, the peptidoglycan subunit is completely assembled before it traverses the cytoplasmic membrane [PMID: 8449890].

MurG belongs to the GT-B structural superfamily of glycoslytransferases, which have characteristic N- and C-terminal domains, each containing a typical Rossmann fold [PMID: 10892798]. The two domains have high structural homology despite minimal sequence homology. The large cleft that separates the two domains includes the catalytic centre and permits a high degree of flexibility.

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

GO:0050511 undecaprenyldiphospho-muramoylpentapeptide beta-N-acetylglucosaminyltransferase activity

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.