Biology:Ribosylpyrimidine nucleosidase
| ribosylpyrimidine nucleosidase | |||||||||
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| Identifiers | |||||||||
| EC number | 3.2.2.8 | ||||||||
| CAS number | 37288-60-1 | ||||||||
| 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 | ||||||||
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In enzymology, a ribosylpyrimidine nucleosidase (EC 3.2.2.8) is an enzyme that catalyzes the chemical reaction
- a pyrimidine nucleoside + H2O [math]\displaystyle{ \rightleftharpoons }[/math] 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
As of late 2007, two structures have been solved for this class of enzymes, with PDB accession codes 1Q8F and 1YOE.
References
- "Purification and properties of nucleoside hydrolase from Pseudomonas fluorescens". J. Biol. Chem. 242 (23): 5578–85. 1967. PMID 12325375.
- "The RihA, RihB, and RihC ribonucleoside hydrolases of Escherichia coli. Substrate specificity, gene expression, and regulation". J. Biol. Chem. 276 (2): 884–94. 2001. doi:10.1074/jbc.M008300200. PMID 11027694.
- "Cloning, purification, crystallization and X-ray analysis of the Escherichia coli pyrimidine nucleoside hydrolase YeiK". Acta Crystallogr. D 60 (Pt 3): 524–7. 2004. doi:10.1107/S0907444903028488. PMID 14993681.
- "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. 2004. doi:10.1016/j.str.2004.03.018. PMID 15130467.
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