Lineage for Superfamily c.8.4: PA domain
- Root: SCOPe 2.05
Class c: Alpha and beta proteins (a/b) [51349] (148 folds) 
Fold c.8: The "swivelling" beta/beta/alpha domain [52008] (10 superfamilies)
3 layers: b/b/a; the central sheet is parallel, and the other one is antiparallel; there are some variations in topology
this domain is thought to be mobile in most multi-domain proteins known to contain it
Superfamily c.8.4: PA domain [52025] (1 family) 
Family:
c.8.4.1: PA domain [52026] (2 proteins)
More info for Superfamily c.8.4: PA domain
Timeline for Superfamily c.8.4: PA domain:
- Superfamily c.8.4: PA domain first appeared (with stable ids) in SCOP 1.55, called Superfamily c.8.4: Transferrin receptor ectodomain, apical domain
- Superfamily c.8.4: PA domain appears in SCOPe 2.04
- Superfamily c.8.4: PA domain appears in SCOPe 2.06
- Superfamily c.8.4: PA domain appears in the current release, SCOPe 2.08