Creatininase is a member of the urease-related amidohydrolases, the family of hydrolases, those acting on carbon-nitrogen bonds other than peptide bonds, specifically in cyclic amides. The systematic name of this enzyme class is creatinine amidohydrolase. This enzyme is also called creatinine hydrolase. This enzyme participates in arginine and proline metabolism.
Creatininase from Pseudomonas putida has a core structure consisting of 3-layers, alpha/beta/alpha.
As of late 2007, 4 structures have been solved for this class of enzymes, with PDB accession codes 1J2T, 1J2U, 1Q3K, and 1V7Z.
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Creatinine Amidohydrolase catalyzes the hydrolytic reaction converting creatinine to creatine. The enzyme is purified from a microorganism. The molecular size of the enzyme is approximately 175,000. The enzyme is useful for the enzy-matic assay of creatinine when coupled with other related enzymes. Creatinine + H2O → Creatine. Creatinine amidohydrolase
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