InterPro domain: IPR017593

This protein catalyzes the conversion of allantoin (5-ureidohydantoin) to allantoic acid by hydrolytic cleavage of the five-member hydantoin ring [ 1 , 2 ]. The proteins in this family are all in the vicinity of other genes involved in the processes of xanthine/urate/allantoin catabolism.

1. Genetic analysis of a chromosomal region containing genes required for assimilation of allantoin nitrogen and linked glyoxylate metabolism in Escherichia coli. J. Bacteriol. 181, 7479-84
2. Functional expression and characterization of the two cyclic amidohydrolase enzymes, allantoinase and a novel phenylhydantoinase, from Escherichia coli. J. Bacteriol. 182, 7021-8