Deoxyuridine phosphorylase

In enzymology, a deoxyuridine phosphorylase is an enzyme that catalyzes the chemical reaction

deoxyuridine phosphorylase
Identifiers
EC no.2.4.2.23
CAS no.37277-77-3
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
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NCBIproteins
2'-deoxyuridine + phosphate uracil + 2-deoxy-alpha-D-ribose 1-phosphate

Thus, the two substrates of this enzyme are 2'-deoxyuridine and phosphate, whereas its two products are uracil and 2-deoxy-alpha-D-ribose 1-phosphate.

No enzyme is known to be specific for this reaction, hence the EC number originally assigned to this enzyme function (EC 2.4.2.23) was deleted by the IUBMB in 2013.[1] The reaction is catalysed by EC 2.4.2.2, pyrimidine-nucleoside phosphorylase, EC 2.4.2.3, uridine phosphorylase, and EC 2.4.2.4, thymidine phosphorylase.

These enzymes belong to the family of glycosyltransferases, specifically the pentosyltransferases. They participate in pyrimidine metabolism.

References

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  1. ^ "ExplorEnz: EC 2.4.2.23".
  • Soukhova-O'Hare GK, Roberts AM, Gozal D (2006). "Impaired control of renal sympathetic nerve activity following neonatal intermittent hypoxia in rats". Neurosci. Lett. 399 (3): 181–5. doi:10.1016/j.neulet.2006.01.054. PMID 16495004.
  • Yamada EW (1964). "The effect of cortisol administration on the activities of uridine and deoxyuridine phosphorylases of normal and regenerating rat liver". Can. J. Biochem. 42: 317–325.