Lineage for Superfamily a.25.4: PE/PPE dimer-like
- Root: SCOPe 2.01
Class a: All alpha proteins [46456] (284 folds) 
Fold a.25: Ferritin-like [47239] (6 superfamilies)
core: 4 helices; bundle, closed, left-handed twist; 1 crossover connection
Superfamily a.25.4: PE/PPE dimer-like [140459] (2 families) 
(hetero)dimer of alpha-hairpin subunits similar to that of the half-ferritin family; no bound metals inside the bundle
Families:
a.25.4.1: PE [140460] (1 protein)
Pfam PF00934; pairs with with the N-terminal hairpin of PPE
a.25.4.2: PPE [140463] (1 protein)
Pfam PF00823; contains extra C-terminal alpha-hairpin, unlike the PE family subunit
More info for Superfamily a.25.4: PE/PPE dimer-like
Timeline for Superfamily a.25.4: PE/PPE dimer-like:
- Superfamily a.25.4: PE/PPE dimer-like first appeared in SCOP 1.73
- Superfamily a.25.4: PE/PPE dimer-like appears in SCOP 1.75
- Superfamily a.25.4: PE/PPE dimer-like appears in SCOPe 2.02
- Superfamily a.25.4: PE/PPE dimer-like appears in the current release, SCOPe 2.08