The Enzyme Database

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Accepted name: lipopolysaccharide core heptose(I) kinase
Reaction: ATP + an α-Hep-(1→3)-α-Hep-(1→5)-[α-Kdo-(2→4)]-α-Kdo-(2→6)-[lipid A] = ADP + an α-Hep-(1→3)-4-O-phospho-α-Hep-(1→5)-[α-Kdo-(2→4)]-α-Kdo-(2→6)-[lipid A]
Glossary: Lipid A is a lipid component of the lipopolysaccharides (LPS) of Gram-negative bacteria. It usually consists of two glucosamine units connected by a β(1→6) bond and decorated with four to seven acyl chains and up to two phosphate groups.
Hep = L-glycero-β-D-manno-heptose
Other name(s): WaaP; RfaP
Systematic name: ATP:an α-Hep-(1→3)-α-Hep-(1→5)-[α-Kdo-(2→4)]-α-Kdo-(2→6)-[lipid A] heptoseI 4-O-phosphotransferase
Comments: The enzyme catalyses the phosphorylation of L-glycero-D-manno-heptose I (the first heptose added to the lipid, Hep I) in the biosynthesis of the inner core oligosaccharide of the lipopolysaccharide (endotoxin) of some Gram-negative bacteria.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
1.  Yethon, J.A. and Whitfield, C. Purification and characterization of WaaP from Escherichia coli, a lipopolysaccharide kinase essential for outer membrane stability. J. Biol. Chem. 276 (2001) 5498–5504. [DOI] [PMID: 11069912]
2.  Zhao, X. and Lam, J.S. WaaP of Pseudomonas aeruginosa is a novel eukaryotic type protein-tyrosine kinase as well as a sugar kinase essential for the biosynthesis of core lipopolysaccharide. J. Biol. Chem. 277 (2002) 4722–4730. [DOI] [PMID: 11741974]
3.  Kreamer, N.NK., Chopra, R., Caughlan, R.E., Fabbro, D., Fang, E., Gee, P., Hunt, I., Li, M., Leon, B.C., Muller, L., Vash, B., Woods, A.L., Stams, T., Dean, C.R. and Uehara, T. Acylated-acyl carrier protein stabilizes the Pseudomonas aeruginosa WaaP lipopolysaccharide heptose kinase. Sci. Rep. 8:14124 (2018). [DOI] [PMID: 30237436]
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