MetaCyc Reaction:

Superclasses: Reactions Classified By Conversion TypeSimple ReactionsChemical Reactions
Reactions Classified By SubstrateSmall-Molecule Reactions

EC Number:

The direction shown, i.e. which substrates are on the left and right sides, is in accordance with the direction in which it was curated.

Mass balance status: Balance undetermined; a substrate lacks a chemical formula

Instance reaction:
CMP + H2O → cytosine + D-ribofuranose 5-phosphate (

Enzyme Commission Primary Name: pyrimidine-5′-nucleotide nucleosidase

Enzyme Commission Synonyms: pyrimidine nucleotide N-ribosidase, Pyr5N

Enzyme Commission Summary:
Also acts on dUMP, dTMP and dCMP.

Citations: [Imada67]

Unification Links: KEGG:R02171

Relationship Links: BRENDA:EC:, ENZYME:EC:, IUBMB-ExplorEnz:EC:


Imada67: Imada, A. (1967). "Degradation of pyrimidine nucleotides by enzyme systems of Streptomyces. II. Pyrimidine 5-nucleotide phosphoribo(deoxyribo) hydrolase of Streptomyces virginiae." J. Gen. Appl. Microbiol.

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Please cite the following article in publications resulting from the use of MetaCyc: Caspi et al, Nucleic Acids Research 42:D459-D471 2014
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