Fold: Flavodoxin-like

3 layers, a/b/a; parallel beta-sheet of 5 strand, order 21345

Lineage:

1. Root: scop
2. Class: Alpha and beta proteins (a/b)
   Mainly parallel beta sheets (beta-alpha-beta units)
3. Fold: Flavodoxin-like
   3 layers, a/b/a; parallel beta-sheet of 5 strand, order 21345

Superfamilies:

1. CheY-like (3)
2. Toll/Interleukin receptor TIR domain (1)
3. Hypothetical protein MTH538 (1)
4. Succinyl-CoA synthetase domains (1)
5. Flavoproteins (3)
6. Cobalamin (vitamin B12)-binding domain (1)
7. Ornithine decarboxylase N-terminal "wing" domain (1)
8. N5-carboxyaminoimidazole ribonucleotide (N5-CAIR) mutase PurE (1)
9. Cutinase-like (1)
10. Esterase/acetylhydrolase (4)
11. Beta-D-glucan exohydrolase, C-terminal domain (1)
12. Formate/glycerate dehydrogenase catalytic domain-like (3)
13. Type II 3-dehydroquinate dehydratase (1)
14. Nucleoside 2-deoxyribosyltransferase (1)
15. Ribosomal protein S2 (1)
    fold elaborated with additional structures
16. Class I glutamine amidotransferase-like (4)
    cornserved positions of the oxyanion hole and catalytic nucleophile; different costituent families contain different additional structures