Biology:Uridine kinase
| uridine kinase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 Uridine-cytidine kinase 2, tetramer, Human | |||||||||
| Identifiers | |||||||||
| EC number | 2.7.1.48 | ||||||||
| CAS number | 9026-39-5 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
| |||||||||
In enzymology, an uridine kinase (EC 2.7.1.48) is an enzyme that catalyzes the chemical reaction
- ATP + uridine [math]\displaystyle{ \rightleftharpoons }[/math] ADP + UMP
Thus, the two substrates of this enzyme are ATP and uridine, whereas its two products are ADP and UMP.
This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing groups (phosphotransferases) with an alcohol group as acceptor. The systematic name of this enzyme class is ATP:uridine 5'-phosphotransferase. Other names in common use include pyrimidine ribonucleoside kinase, uridine-cytidine kinase, uridine kinase (phosphorylating), and uridine phosphokinase. This enzyme participates in pyrimidine metabolism.
Structural studies
As of late 2007, 8 structures have been solved for this class of enzymes, with PDB accession codes 1UDW, 1UEI, 1UEJ, 1UFQ, 1UJ2, 1XRJ, 2JEO, and 2UVQ.
References
- "Regulation of enzymic activity by metabolites. I. Uridine-cytidine kinase of Novikoff ascites rat tumor". The Journal of Biological Chemistry 244 (8): 2204–9. April 1969. PMID 5782006.
- "Uridine kinase from Erlich ascites tumor: purification and properties". J. Biol. Chem. 235: 3273–3279. 1960.
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