Reaction: 5-hydroxyisourate + H2O = 5-hydroxy-2-oxo-4-ureido-2,5-dihydro-1H-imidazole-5-carboxylate
For diagram click here.
Other name(s): HIUHase; 5-hydroxyisourate hydrolase
Systematic name: 5-hydroxyisourate amidohydrolase
Comments: The reaction is the first stage in the conversion of 5-hydroxyisourate into S-allantoin. This reaction will also occur spontaneously but more slowly.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 255885-20-2
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