Lineage for Family a.4.5.49: Archaeal DNA-binding protein

1. Root: SCOP 1.69

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

3. Fold a.4: DNA/RNA-binding 3-helical bundle [46688] (13 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] (55 families) contains a small beta-sheet (wing)

5. Family a.4.5.49: Archaeal DNA-binding protein [109677] (1 protein) contains long helix in the C-terminal extension; forms dimer similar to the RTP and LysR dimers