Nucleoside-triphosphatase

nucleoside-triphosphatase
Identifiers
EC number	3.6.1.15
CAS number	9075-51-8
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 / EGO
Search PMC articles PubMed articles NCBI proteins

In enzymology, a nucleoside-triphosphatase (EC 3.6.1.15) is an enzyme that catalyzes the chemical reaction

NTP + H₂O $\rightleftharpoons$ NDP + phosphate

Thus, the two substrates of this enzyme are NTP and H₂O, whereas its two products are NDP and phosphate.

This enzyme belongs to the family of hydrolases, specifically those acting on acid anhydrides in phosphorus-containing anhydrides. The systematic name of this enzyme class is unspecific diphosphate phosphohydrolase. Other names in common use include nucleoside triphosphate phosphohydrolase, nucleoside-5-triphosphate phosphohydrolase, and nucleoside 5-triphosphatase. This enzyme participates in purine metabolism and thiamine metabolism.

Structural studies

As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code 2I3B.

References

• Brightwell R, Tappel AL (1968). "Lysosomal acid pyrophosphatase and acid phosphatase". Arch. Biochem. Biophys. 124 (1): 333–43. doi:10.1016/0003-9861(68)90335-4. PMID 5661608.
• LEWIS M, WEISSMAN S (1965). "PROPERTIES OF A SOLUBLE NUCLEOSIDE TRIPHOSPHATASE ACTIVITY IN MAMMALIAN LIVER". Arch. Biochem. Biophys. 109 (3): 490–8. doi:10.1016/0003-9861(65)90393-0. PMID 14320490.
• Matsushita S, Raacke ID (1968). "Purification of nucleoside triphosphatases from pea seedling ribosomes". Biochim. Biophys. Acta 166 (3): 707–10. doi:10.1016/0005-2787(68)90380-8. PMID 4301913.