IUBMB Enzyme Nomenclature


Accepted name: UDP-4-amino-4-deoxy-L-arabinose aminotransferase

Reaction: UDP-4-amino-4-deoxy-β-L-arabinopyranose + 2-oxoglutarate = UDP-β-L-threo-pentapyranos-4-ulose + L-glutamate

For diagram of reaction click here.

Other name(s): UDP-(β-L-threo-pentapyranosyl-4"-ulose diphosphate) aminotransferase; UDP-4-amino-4-deoxy-L-arabinose—oxoglutarate aminotransferase; UDP-Ara4O aminotransferase; UDP-L-Ara4N transaminase

Systematic name: UDP-4-amino-4-deoxy-β-L-arabinose:2-oxoglutarate aminotransferase

Comments: A pyridoxal 5'-phosphate enzyme.

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


1. Breazeale, S.D., Ribeiro, A.A. and Raetz, C.R. Origin of lipid A species modified with 4-amino-4-deoxy-L-arabinose in polymyxin-resistant mutants of Escherichia coli. An aminotransferase (ArnB) that generates UDP-4-deoxyl-L-arabinose. J. Biol. Chem. 278 (2003) 24731-24739. [PMID: 12704196]

2. Noland, B.W., Newman, J.M., Hendle, J., Badger, J., Christopher, J.A., Tresser, J., Buchanan, M.D., Wright, T.A., Rutter, M.E., Sanderson, W.E., Muller-Dieckmann, H.J., Gajiwala, K.S. and Buchanan, S.G. Structural studies of Salmonella typhimurium ArnB (PmrH) aminotransferase: a 4-amino-4-deoxy-L-arabinose lipopolysaccharide-modifying enzyme. Structure 10 (2002) 1569-1580. [PMID: 12429098]

[EC created 2010]

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