UniProt ID: Q7SYM0 |
FUNCTION: Phosphorylates uridine and cytidine to uridine monophosphate and cytidine monophosphate. Does not phosphorylate deoxyribonucleosides or purine ribonucleosides. Can use ATP or GTP as a phosphate donor. {ECO:0000250|UniProtKB:Q9BZX2}. CATALYTIC ACTIVITY: Reaction=ATP + uridine = ADP + H(+) + UMP; Xref=Rhea:RHEA:16825, ChEBI:CHEBI:15378, ChEBI:CHEBI:16704, ChEBI:CHEBI:30616, ChEBI:CHEBI:57865, ChEBI:CHEBI:456216; EC=2.7.1.48; Evidence={ECO:0000250|UniProtKB:Q9BZX2}; CATALYTIC ACTIVITY: Reaction=ATP + cytidine = ADP + CMP + H(+); Xref=Rhea:RHEA:24674, ChEBI:CHEBI:15378, ChEBI:CHEBI:17562, ChEBI:CHEBI:30616, ChEBI:CHEBI:60377, ChEBI:CHEBI:456216; EC=2.7.1.48; Evidence={ECO:0000250|UniProtKB:Q9BZX2}; PATHWAY: Pyrimidine metabolism; CTP biosynthesis via salvage pathway; CTP from cytidine: step 1/3. {ECO:0000250|UniProtKB:Q9BZX2}. PATHWAY: Pyrimidine metabolism; UMP biosynthesis via salvage pathway; UMP from uridine: step 1/1. {ECO:0000250|UniProtKB:Q9BZX2}. SUBUNIT: Homotetramer. {ECO:0000250|UniProtKB:Q9BZX2}. SIMILARITY: Belongs to the uridine kinase family. {ECO:0000305}. |
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