Lineage for Fold f.17: Transmembrane helix hairpin
- Root: SCOP 1.75
Class f: Membrane and cell surface proteins and peptides [56835] (58 folds) 
Fold f.17: Transmembrane helix hairpin [81334] (5 superfamilies)
two antiparallel transmembrane helices
Superfamilies:
f.17.1: F1F0 ATP synthase subunit C [81333] (1 family) 
f.17.2: Cytochrome c oxidase subunit II-like, transmembrane region [81464] (1 family) 
f.17.3: Magnesium transport protein CorA, transmembrane region [144083] (1 family)
forms homopentameric channel
f.17.4: Htr2 transmembrane domain-like [158212] (1 family) 
f.17.5: PsbZ-like [161055] (1 family)
More info for Fold f.17: Transmembrane helix hairpin
Timeline for Fold f.17: Transmembrane helix hairpin:
- Fold f.17: Transmembrane helix hairpin first appeared in SCOP 1.63
- Fold f.17: Transmembrane helix hairpin appears in SCOP 1.73
- Fold f.17: Transmembrane helix hairpin appears in SCOPe 2.01
- Fold f.17: Transmembrane helix hairpin appears in the current release, SCOPe 2.08