UMP kinase

In enzymology, an UMP kinase (EC 2.7.4.22) is an enzyme that catalyzes the chemical reaction

ATP + UMP ${\displaystyle \rightleftharpoons }$ ADP + UDP

UMP kinase
Identifiers
EC no.	2.7.4.22
CAS no.	9036-23-1
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
Search PMC articles PubMed articles NCBI proteins

Thus, the two substrates of this enzyme are ATP and UMP, whereas its two products are ADP and UDP.

This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing groups (phosphotransferases) with a phosphate group as acceptor. The systematic name of this enzyme class is ATP:UMP phosphotransferase. Other names in common use include uridylate kinase, UMPK, uridine monophosphate kinase, PyrH, UMP-kinase, and SmbA. This enzyme participates in pyrimidine metabolism.

Structural studies

As of March 2010, 19 structures have been solved for this class of enzymes, and are deposited in the PDB. All have a 3-layer (aba) sandwich) architecture (CATH code 3.40.1160.10). These include accession codes 2J4J, 2J4K, 2J4L, and 2VA1.

Search for all UMP Kinases in the PDB using the enzyme Browser at PDBe. (input the EC number)