IUBMB Enzyme Nomenclature


Accepted name: GDP-perosamine synthase

Reaction: GDP-α-D-perosamine + 2-oxoglutarate = GDP-4-dehydro-α-D-rhamnose + L-glutamate

Glossary: GDP-α-D-perosamine = GDP-4-amino-4,6-dideoxy-α-D-mannose
GDP-4-dehydro-α-D-rhamnose = GDP-4-dehydro-6-deoxy-α-D-mannose

Other name(s): RfbE; GDP-4-keto-6-deoxy-D-mannose-4-aminotransferase; GDP-perosamine synthetase; PerA; GDP-4-amino-4,6-dideoxy-α-D-mannose:2-oxoglutarate aminotransferase

Systematic name: GDP-α-D-perosamine:2-oxoglutarate aminotransferase

Comments: A pyridoxal 5′-phosphate enzyme. D-Perosamine is one of several dideoxy sugars found in the O-specific polysaccharide of the lipopolysaccharide component of the outer membrane of Gram-negative bacteria. The enzyme catalyses the final step in GDP-α-D-perosamine synthesis.

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


1. Albermann, C. and Piepersberg, W. Expression and identification of the RfbE protein from Vibrio cholerae O1 and its use for the enzymatic synthesis of GDP-D-perosamine. Glycobiology 11 (2001) 655-661. [PMID: 11479276]

2. Zhao, G., Liu, J., Liu, X., Chen, M., Zhang, H. and Wang, P.G. Cloning and characterization of GDP-perosamine synthetase (Per) from Escherichia coli O157:H7 and synthesis of GDP-perosamine in vitro. Biochem. Biophys. Res. Commun. 363 (2007) 525-530. [PMID: 17888872]

3. Albermann, C. and Beuttler, H. Identification of the GDP-N-acetyl-d-perosamine producing enzymes from Escherichia coli O157:H7. FEBS Lett 582 (2008) 479-484. [PMID: 18201574]

4. Cook, P.D., Carney, A.E. and Holden, H.M. Accommodation of GDP-linked sugars in the active site of GDP-perosamine synthase. Biochemistry 47 (2008) 10685-10693. [PMID: 18795799]

[EC created 2013]

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