In enzymology, a 4-methyleneglutaminase () is an enzyme that catalyzes the chemical reaction 4-methylene-L-glutamine + H2O 4-methylene-L-glutamate + NH3 Thus, the two substrates of this enzyme are 4-methylene-L-glutamine and H2O, whereas its two products are 4-methylene-L-glutamate and NH3. This enzyme belongs to the family of hydrolases, those acting on carbon-nitrogen bonds other than peptide bonds, specifically in linear amides. The systematic name of this enzyme class is 4-methylene-L-glutamine amidohydrolase. Other names in common use include 4-methyleneglutamine deamidase, and 4-methyleneglutamine amidohydrolase. This enzyme participates in c5-branched dibasic acid metabolism. References EC 3.5.1 Enzymes of unknown structure