ID   3.5.2.17
DE   Hydroxyisourate hydrolase.
AN   5-hydroxyisourate hydrolase.
AN   HIUHase.
CA   5-hydroxyisourate + H(2)O = 5-hydroxy-2-oxo-4-ureido-2,5-dihydro-
CA   1H-imidazole-5-carboxylate.
CC   -!- The reaction is the first stage in the conversion of
CC       5-hydroxyisourate into (S)-allantoin.
CC   -!- This reaction will also occur spontaneously, but more slowly.
DR   Q21882, HIUH1_CAEEL;  Q92VB9, HIUH1_RHIME;  O44578, HIUH2_CAEEL;
DR   Q92UG5, HIUH2_RHIME;  Q9KET9, HIUH_BACHD ;  O32142, HIUH_BACSU ;
DR   Q8YFU1, HIUH_BRUME ;  Q8G228, HIUH_BRUSU ;  Q9A545, HIUH_CAUCR ;
DR   Q06S87, HIUH_DANRE ;  Q9RV69, HIUH_DEIRA ;  Q8XB75, HIUH_ECO57 ;
DR   P76341, HIUH_ECOLI ;  Q9CRB3, HIUH_MOUSE ;  Q9I3J5, HIUH_PSEAE ;
DR   Q8XXJ7, HIUH_RALSO ;  Q98CI7, HIUH_RHILO ;  Q4VYA5, HIUH_SALDU ;
DR   Q8Z7Q6, HIUH_SALTI ;  Q8ZQ52, HIUH_SALTY ;  O74492, HIUH_SCHPO ;
DR   Q8S3J3, HIUH_SOYBN ;  Q9LVM5, TTHL_ARATH ;
//