_EC 3.5.2.- In cyclic amides. 2,272 PDB entries  
EC 3.-.-.- Hydrolases. [52,127 PDB entries]
EC 3.5.-.- Acting on carbon-nitrogen bonds, other than peptide bonds. [4,894 PDB entries]
EC 3.5.2.- In cyclic amides. [2,272 PDB entries]
EC 3.5.2.1 barbiturase. [4 PDB entries]
EC 3.5.2.2 dihydropyrimidinase. [20 PDB entries]
EC 3.5.2.3 dihydroorotase. [97 PDB entries]
EC 3.5.2.4 carboxymethylhydantoinase. [-]
EC 3.5.2.5 allantoinase. [6 PDB entries]
EC 3.5.2.6 beta-lactamase. [2,082 PDB entries]
EC 3.5.2.7 imidazolonepropionase. [6 PDB entries]
EC 3.5.2.8 Transferred entry: 3.5.2.6. [-]
EC 3.5.2.9 5-oxoprolinase (ATP-hydrolyzing). [7 PDB entries]
EC 3.5.2.10 creatininase. [12 PDB entries]
EC 3.5.2.11 L-lysine-lactamase. [-]
EC 3.5.2.12 6-aminohexanoate-cyclic-dimer hydrolase. [2 PDB entries]
EC 3.5.2.13 2,5-dioxopiperazine hydrolase. [-]
EC 3.5.2.14 N-methylhydantoinase (ATP-hydrolyzing). [-]
EC 3.5.2.15 cyanuric acid amidohydrolase. [14 PDB entries]
EC 3.5.2.16 maleimide hydrolase. [-]
EC 3.5.2.17 hydroxyisourate hydrolase. [18 PDB entries]
EC 3.5.2.18 enamidase. [1 PDB entries]
EC 3.5.2.19 streptothricin hydrolase. [1 PDB entries]
EC 3.5.2.20 isatin hydrolase. [2 PDB entries]

[-] signifies that there are no PDB entries for the given enzyme subclass