Fold: alpha/alpha toroid

multihelical; up to seven alpha-hairpins are arranged in closed circular array

Lineage:

1. Root: scop
2. Class: All alpha proteins
3. Fold: alpha/alpha toroid
   multihelical; up to seven alpha-hairpins are arranged in closed circular array

Superfamilies:

1. Six-hairpin glycosyltransferases (3)
2. Seven-hairpin glycosyltransferases (1)
3. Chondroitin AC/alginate lyase (2)
   incoplete toroid
4. Terpenoid cylases/Protein prenyltransferases (4)