IUBMB Enzyme Nomenclature


Accepted name: IMP dehydrogenase

Reaction: IMP + NAD+ + H2O = XMP + NADH + H+

For diagram click here.

Glossary: IMP = inosine 5'-phosphate
XMP = xanthosine 5'-phosphate

Other name(s): inosine-5'-phosphate dehydrogenase; inosinic acid dehydrogenase; inosinate dehydrogenase; inosine 5'-monophosphate dehydrogenase; inosine monophosphate dehydrogenase; IMP oxidoreductase; inosine monophosphate oxidoreductase

Systematic name: IMP:NAD+ oxidoreductase

Comments: The enzyme acts on the hydroxy group of the hydrated derivative of the substrate. Formerly EC

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 9028-93-7


1. Magasanik, B., Moyed, H.S. and Gehring, L.B. Enzymes essential for the biosynthesis of nucleic acid guanine; inosine 5'-phosphate dehydrogenase of Aerobacter aerogenes. J. Biol. Chem. 226 (1957) 339-350.

2. Turner, J.F. and King, J.E. Inosine 5-phosphate dehydrogenase of pea seeds. Biochem. J. 79 (1961) 147.

[EC created 1961 as EC, transferred 1984 to EC]

Return to EC 1.1.1 home page
Return to EC 1.1 home page
Return to EC 1 home page
Return to Enzymes home page
Return to IUBMB Biochemical Nomenclature home page