| Class d: Alpha and beta proteins (a+b) [53931] (260 folds) |
| Fold d.96: T-fold [55619] (1 superfamily) beta(2)-alpha(2)-beta(2); 2 layers: alpha/beta; antiparallel sheet 1234 tunnel-shaped: its known members form wide oligomeric barrels different sizes |
Superfamily d.96.1: Tetrahydrobiopterin biosynthesis enzymes-like [55620] (4 families) ![]() bind purine or pterin in topologically similar sites between subunits |
| Family d.96.1.1: GTP cyclohydrolase I [55621] (1 protein) |
| GTP cyclohydrolase I [55622] (3 species) beta-sheets of five subunits form a barrel, closed: n=20, S=20 |
| Species Escherichia coli [TaxId:562] [55623] (7 PDB entries) |
| Species Human (Homo sapiens) [TaxId:9606] [55624] (1 PDB entry) |
| Species Rat (Rattus norvegicus) [TaxId:10116] [69790] (2 PDB entries) |
Timeline for Family d.96.1.1: GTP cyclohydrolase I: