Fold: Leucine-rich repeat, LRR (right-handed beta-alpha superhelix)

2 curved layers, a/b; parallel beta-sheet; order 1234...N

Lineage:

1. Root: scop
2. Class: Alpha and beta proteins (a/b)
   Mainly parallel beta sheets (beta-alpha-beta units)
3. Fold: Leucine-rich repeat, LRR (right-handed beta-alpha superhelix)
   2 curved layers, a/b; parallel beta-sheet; order 1234...N

Superfamilies:

1. RNI-like (3)
   regular structure consisting of similar repeats
2. L domain-like (5)
   less regular structure consisting of variable repeats