IUBMB Enzyme Nomenclature


Accepted name: UDP-2,3-diacylglucosamine diphosphatase

Reaction: UDP-2-N,3-O-bis[(3R)-3-hydroxytetradecanoyl]-α-D-glucosamine + H2O = 2-N,3-O-bis[(3R)-3-hydroxytetradecanoyl ]-α-D-glucosaminyl 1-phosphate + UMP

For diagram of reaction click here.

Glossary: tetradecanoyl = myristoyl

Other name(s): UDP-2,3-diacylglucosamine hydrolase; UDP-2,3-diacylglucosamine pyrophosphatase; ybbF (gene name); lpxH (gene name); UDP-2,3-bis[(3R)-3-hydroxymyristoyl]-α-D-glucosamine 2,3-bis[(3R)-3-hydroxymyristoyl]-β-D-glucosaminyl 1-phosphate phosphohydrolase (incorrect)

Systematic name: UDP-2-N,3-O-bis[(3R)-3-hydroxytetradecanoyl]-α-D-glucosamine 2-N,3-O-bis[(3R)-3-hydroxytetradecanoyl]-α-D-glucosaminyl 1-phosphate phosphohydrolase

Comments: The enzyme catalyses a step in the biosynthesis of lipid A.

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


1. Babinski, K.J., Ribeiro, A.A. and Raetz, C.R. The Escherichia coli gene encoding the UDP-2,3-diacylglucosamine pyrophosphatase of lipid A biosynthesis. J. Biol. Chem. 277 (2002) 25937-25946. [PMID: 12000770]

2. Babinski, K.J., Kanjilal, S.J. and Raetz, C.R. Accumulation of the lipid A precursor UDP-2,3-diacylglucosamine in an Escherichia coli mutant lacking the lpxH gene. J. Biol. Chem. 277 (2002) 25947-25956. [PMID: 12000771]

[EC created 2010]

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