In enzymology, a 5-oxoprolinase (ATP-hydrolysing) () is an enzyme that catalyzes the chemical reaction ATP + 5-oxo-L-proline + 2 H2O ADP + phosphate + L-glutamate The 3 substrates of this enzyme are ATP, 5-oxo-L-proline, and H2O, whereas its 3 products are ADP, phosphate, and L-glutamate. This enzyme belongs to 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 5-oxo-L-proline amidohydrolase (ATP-hydrolysing). Other names in common use include pyroglutamase (ATP-hydrolysing), oxoprolinase, pyroglutamase, 5-oxoprolinase, pyroglutamate hydrolase, pyroglutamic hydrolase, L-pyroglutamate hydrolase, 5-oxo-L-prolinase, and pyroglutamase. This enzyme participates in glutathione metabolism. References EC 3.5.2 Enzymes of unknown structure