In enzymology, a blasticidin-S deaminase () is an enzyme that catalyzes the chemical reaction blasticidin S + H2O deaminohydroxyblasticidin S + NH3 Thus, the two substrates of this enzyme are blasticidin S and H2O, whereas its two products are deaminohydroxyblasticidin S 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 blasticidin-S aminohydrolase. Structural studies As of late 2007, two structures have been solved for this class of enzymes, with PDB accession codes and . References EC 3.5.4 Enzymes of known structure