ExplorEnz: EC 2.4.2.3

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2.4.2.3

Accepted name:

uridine phosphorylase

Reaction:

uridine + phosphate = uracil + α-D-ribose 1-phosphate

Other name(s):

pyrimidine phosphorylase; UrdPase; UPH; UPase

Systematic name:

uridine:phosphate α-D-ribosyltransferase

Comments:

The enzyme participates the the pathways of pyrimidine ribonucleosides degradation and salvage. The mammalian enzyme also accepts 2′-deoxyuridine.

Links to other databases:

BRENDA, EXPASY, GTD, KEGG, MetaCyc, PDB, CAS registry number: 9030-22-2

References:

1.	Canellakis, E.S. Pyrimidine metabolism. II. Enzymatic pathways of uracil anabolism. J. Biol. Chem. 227 (1957) 329–338. [PMID: 13449076]
2.	Paege, L.M. and Schlenk, F. Bacterial uracil riboside phosphorylase. Arch. Biochem. Biophys. 40 (1952) 42–49. [DOI] [PMID: 12997187]
3.	Leer, J.C., Hammer-Jespersen, K. and Schwartz, M. Uridine phosphorylase from Escherichia coli. Physical and chemical characterization. Eur. J. Biochem. 75 (1977) 217–224. [DOI] [PMID: 16751]
4.	Pontis, H., Degerstedt, G. and Reichard, P. Uridine and deoxyuridine phosphorylases from Ehrlich ascites tumor. Biochim. Biophys. Acta 51 (1961) 138–147. [DOI] [PMID: 13737038]
5.	Watanabe, S. and Uchida, T. Cloning and expression of human uridine phosphorylase. Biochem. Biophys. Res. Commun. 216 (1995) 265–272. [DOI] [PMID: 7488099]
6.	Liu, M., Cao, D., Russell, R., Handschumacher, R.E. and Pizzorno, G. Expression, characterization, and detection of human uridine phosphorylase and identification of variant uridine phosphorolytic activity in selected human tumors. Cancer Res. 58 (1998) 5418–5424. [PMID: 9850074]

[EC 2.4.2.3 created 1961]