Cytosine deaminase

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cytosine deaminase
Identifiers
ExPASy
NiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO
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PMCarticles
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NCBIproteins

In

enzymology, a cytosine deaminase (EC 3.5.4.1) is an enzyme that catalyzes the chemical reaction

cytosine + H2O uracil + NH3

Thus, the two

substrates of this enzyme are cytosine[1] and H2O, whereas its two products are uracil and NH3
.

This enzyme belongs to the family of hydrolases, those acting on carbon-nitrogen bonds other than peptide bonds, specifically in cyclic amidines. The systematic name of this enzyme class is cytosine aminohydrolase. This enzyme is also called isocytosine deaminase. This enzyme participates in pyrimidine metabolism.

Structural studies

As of late 2007, 13

structures have been solved for this class of enzymes, with PDB accession codes 1K6W, 1K70, 1OX7, 1P6O, 1R9X, 1R9Y, 1RA0, 1RA5, 1RAK, 1RB7, 1UAQ, 1YSB, and 1YSD
.

References