IUBMB Enzyme Nomenclature


Accepted name: GalNAc-α-(1→4)-GalNAc-α-(1→3)-diNAcBac-PP-undecaprenol α-1,4-N-acetyl-D-galactosaminyltransferase

Reaction: 3 UDP-N-acetyl-α-D-galactosamine + GalNAc-α-(1→4)-GalNAc-α-(1→3)-diNAcBac-PP-tritrans,heptacis-undecaprenol = 3 UDP + [GalNAc-α-(1→4)]4-GalNAc-α-(1→3)-diNAcBac-PP-tritrans,heptacis-undecaprenol

For diagram of reaction click here.

Glossary: diNAcBac = N,N'-diacetyl-D-bacillosamine = 2,4-diacetamido-2,4,6-trideoxy-D-glucopyranose

Other name(s): PglH

Systematic name: UDP-N-acetyl-α-D-galactosamine:GalNAc-α-(1→4)-GalNAc-α-(1→3)-diNAcBac-PP-tritrans,heptacis-undecaprenol 4-α-N-acetyl-D-galactosaminyltransferase

Comments: Isolated from Campylobacter jejuni. Part of a bacterial N-linked glycosylation pathway.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number:


1. Glover, K.J., Weerapana, E. and Imperiali, B. In vitro assembly of the undecaprenylpyrophosphate-linked heptasaccharide for prokaryotic N-linked glycosylation. Proc. Natl. Acad. Sci. USA 102 (2005) 14255-14259. [PMID: 16186480]

2. Troutman, J.M. and Imperiali, B. Campylobacter jejuni PglH is a single active site processive polymerase that utilizes product inhibition to limit sequential glycosyl transfer reactions. Biochemistry 48 (2009) 2807-2816. [PMID: 19159314]

3. Borud, B., Viburiene, R., Hartley, M.D., Paulsen, B.S., Egge-Jacobsen, W., Imperiali, B. and Koomey, M. Genetic and molecular analyses reveal an evolutionary trajectory for glycan synthesis in a bacterial protein glycosylation system. Proc. Natl. Acad. Sci. USA 108 (2011) 9643-9648. [PMID: 21606362]

[EC created 2012]

Return to EC 2.4.1 home page
Return to EC 2.4 home page
Return to EC 2 home page
Return to Enzymes home page
Return to IUBMB Biochemical Nomenclature home page