Fold: T-fold [55619]
beta(2)-alpha(2)-beta(2); 2 layers: alpha/beta; antiparallel sheet 1234 tunnel-shaped: its known members form wide oligomeric barrels different sizes
Protein: Urate oxidase (uricase) [55634]
duplication: one subunit consists of two domains of this fold; beta-sheets of two subunits form a barrel, closed: n=16, S=16