Lineage for Family a.43.1.4: Omega transcriptional repressor

1. Root: SCOP 1.71

2. Class a: All alpha proteins [46456] (226 folds)

3. Fold a.43: Ribbon-helix-helix [47597] (1 superfamily) core: 4 helices; array of 2 hairpins, opened

4. Superfamily a.43.1: Ribbon-helix-helix [47598] (4 families) formerly Met repressor-like; dimeric proteins; the N-termini form a small beta-sheet ribbon

5. Family a.43.1.4: Omega transcriptional repressor [100971] (1 protein) plasmid-encoded, similar to the phage repressor family