EC - Glucosamine-6-phosphate deaminase

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IntEnz Enzyme Nomenclature


Accepted name:
glucosamine-6-phosphate deaminase
Other names:
aminodeoxyglucosephosphate isomerase
glucosamine phosphate deaminase
glucosaminephosphate isomerase
phosphoglucosamine isomerase
glucosamine-6-phosphate isomerase
GlcN6P deaminase
Systematic name:
2-amino-2-deoxy-D-glucose-6-phosphate aminohydrolase (ketol isomerizing)



Formerly EC Isomerization of the aldose-ketose type converts the -CH(-NH2)-CH=O group of glucosamine 6-phosphate into -C(=NH)-CH2-OH, forming 2-deoxy-2-imino-D-arabino-hexitol, which then hydrolyses to yield fructose 6-phosphate and ammonia. N-Acetyl-D-glucosamine 6-phosphate, which is not broken down, activates the enzyme.

Links to other databases

Enzymes and pathways: NC-IUBMB , BRENDA , DIAGRAM , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , UniPathway
Protein domains and families: PROSITE:PDOC00894
Structural data: CSA , EC2PDB
Gene Ontology: GO:0004342
CAS Registry Number: 9013-10-9
UniProtKB/Swiss-Prot: (295) [show] [UniProt]


  1. Comb, D.G. and Roseman, S.
    Glucosamine metabolism. IV. Glucosamine-6-phosphate deaminase.
    J. Biol. Chem. 232 : 807-827 (1958). [PMID: 13403679]
  2. Pattabiraman, T.N. and Bachhawat, B.K.
    Purification of glucosamine 6-phosphate deaminase from human brain.
    Biochim. Biophys. Acta 54 : 273-283 (1961). [PMID: 13549465]
  3. Wolfe, J.G., Britton, B.B. and Nakada, H.I.
    Glucosamine degradation by Escherichia coli. III. Isolation and studies of "phosphoglucosaminisomerase".
    Arch. Biochem. Biophys. 66 : 333-339 (1957). [PMID: 14484386]
  4. Liu, C., Li, D., Liang, Y. H., Li, L. F., Su, X. D.
    Ring-opening mechanism revealed by crystal structures of NagB and its ES intermediate complex.
    J. Mol. Biol. 379 : 73-81 (2008). [PMID: 18436239]

[EC created 1961 as EC, transferred 2000 to EC]