Lineage for Superfamily a.24.19: Flagellar export chaperone FliS

1. Root: SCOP 1.69

2. Class a: All alpha proteins [46456] (218 folds)

3. Fold a.24: Four-helical up-and-down bundle [47161] (23 superfamilies) core: 4 helices; bundle, closed or partly opened, left-handed twist; up-and-down

4. Superfamily a.24.19: Flagellar export chaperone FliS [101116] (1 family) can form closed, open and helix-swapped bundles