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Ribosylpyrimidine nucleosidase

From Wikipedia, the free encyclopedia
ribosylpyrimidine nucleosidase
Identifiers
EC no.3.2.2.8
CAS no.37288-60-1
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO
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PMCarticles
PubMedarticles
NCBIproteins

In enzymology, a ribosylpyrimidine nucleosidase (EC 3.2.2.8) is an enzyme that catalyzes the chemical reaction

a pyrimidine nucleoside + H2O D-ribose + a pyrimidine base

Thus, the two substrates of this enzyme are pyrimidine nucleoside and H2O, whereas its two products are D-ribose and pyrimidine base.

This enzyme belongs to the family of hydrolases, specifically those glycosylases that hydrolyse N-glycosyl compounds. The systematic name of this enzyme class is pyrimidine-nucleoside ribohydrolase. Other names in common use include N-ribosylpyrimidine nucleosidase, pyrimidine nucleosidase, N-ribosylpyrimidine ribohydrolase, pyrimidine nucleoside hydrolase, RihB, YeiK, and nucleoside ribohydrolase. This enzyme participates in purine metabolism and pyrimidine metabolism.

Structural studies

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As of late 2007, two structures have been solved for this class of enzymes, with PDB accession codes 1Q8F and 1YOE.

References

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  • Terada M, Tatibana M, Hayaishi O (1967). "Purification and properties of nucleoside hydrolase from Pseudomonas fluorescens". J. Biol. Chem. 242 (23): 5578–85. doi:10.1016/S0021-9258(18)99396-8. PMID 12325375.
  • Petersen C, Moller LB (2001). "The RihA, RihB, and RihC ribonucleoside hydrolases of Escherichia coli. Substrate specificity, gene expression, and regulation". J. Biol. Chem. 276 (2): 884–94. doi:10.1074/jbc.M008300200. PMID 11027694.
  • Giabbai B, Degano M (2004). "Cloning, purification, crystallization and X-ray analysis of the Escherichia coli pyrimidine nucleoside hydrolase YeiK". Acta Crystallogr. D. 60 (Pt 3): 524–7. doi:10.1107/S0907444903028488. PMID 14993681.
  • Giabbai B, Degano M (2004). "Crystal structure to 1.7 a of the Escherichia coli pyrimidine nucleoside hydrolase YeiK, a novel candidate for cancer gene therapy". Structure. 12 (5): 739–49. doi:10.1016/j.str.2004.03.018. PMID 15130467.