Lineage for Superfamily a.29.16: IVS-encoded protein-like

1. Root: SCOP 1.75

2. Class a: All alpha proteins [46456] (284 folds)

3. Fold a.29: Bromodomain-like [47363] (15 superfamilies) 4 helices; bundle; minor mirror variant of up-and-down topology

4. Superfamily a.29.16: IVS-encoded protein-like [158446] (1 family) IVS: Intervening sequence with conserved ORF in eubacterial 23S rRNA genes; forms a homopentamer with a toroid-shaped structure containing a tapered central channel