IUBMB Enzyme Nomenclature


Accepted name: 5'-deoxynucleotidase

Reaction: a 2'-deoxyribonucleoside 5'-monophosphate + H2O = a 2'-deoxyribonucleoside + phosphate

Other name(s): yfbR (gene name)

Systematic name: 2'-deoxyribonucleoside 5'-monophosphate phosphohydrolase

Comments: The enzyme, characterized from the bacterium Escherichia coli, shows strict specificity towards deoxyribonucleoside 5'-monophosphates and does not dephosphorylate 5'-ribonucleotides or ribonucleoside 3'-monophosphates. A divalent metal cation is required for activity, with cobalt providing the highest activity.

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


1. Proudfoot, M., Kuznetsova, E., Brown, G., Rao, N.N., Kitagawa, M., Mori, H., Savchenko, A. and Yakunin, A.F. General enzymatic screens identify three new nucleotidases in Escherichia coli. Biochemical characterization of SurE, YfbR, and YjjG. J. Biol. Chem. 279 (2004) 54687-54694. [PMID: 15489502]

2. Zimmerman, M.D., Proudfoot, M., Yakunin, A. and Minor, W. Structural insight into the mechanism of substrate specificity and catalytic activity of an HD-domain phosphohydrolase: the 5'-deoxyribonucleotidase YfbR from Escherichia coli. J. Mol. Biol. 378 (2008) 215-226. [PMID: 18353368]

[EC created 2013]

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