Fold: Tubulin, GTPase domain

3 layers: a/b/a; parallel beta-sheet of 6 strands, order 321456

Lineage:

1. Root: scop
2. Class: Alpha and beta proteins (a/b)
   Mainly parallel beta sheets (beta-alpha-beta units)
3. Fold: Tubulin, GTPase domain
   3 layers: a/b/a; parallel beta-sheet of 6 strands, order 321456

Superfamilies:

1. Tubulin, GTPase domain (1)
   1. Tubulin, GTPase domain (3)
      1. Cell-division protein FtsZ
         1. Methanococcus jannaschii (1)
      2. Tubulin alpha-subunit
         1. Pig (Sus scrofa) (1)
      3. Tubulin beta-subunit
         1. Pig (Sus scrofa) (1)