Lineage for Family a.4.5.9: Transcription factor MotA, activation domain

1. Root: SCOP 1.73

2. Class a: All alpha proteins [46456] (258 folds)

3. Fold a.4: DNA/RNA-binding 3-helical bundle [46688] (14 superfamilies) core: 3-helices; bundle, closed or partly opened, right-handed twist; up-and down

4. Superfamily a.4.5: "Winged helix" DNA-binding domain [46785] (68 families) contains a small beta-sheet (wing)

5. Family a.4.5.9: Transcription factor MotA, activation domain [46813] (1 protein) The N- and C-terminal helical extensions to the common fold form the dimer interface (distinct from that of ArsR-like family)