Fold: Cell cycle regulatory proteins

beta(2)-alpha(2)-beta(2); 2 layers: alpha/beta; antiparallel sheet 1243
can form strand-exchange dimers

Lineage:

1. Root: scop
2. Class: Alpha and beta proteins (a+b)
   Mainly antiparallel beta sheets (segregated alpha and beta regions)
3. Fold: Cell cycle regulatory proteins
   beta(2)-alpha(2)-beta(2); 2 layers: alpha/beta; antiparallel sheet 1243
   can form strand-exchange dimers

Superfamilies:

1. Cell cycle regulatory proteins (1)
   1. Cell cycle regulatory proteins (4)
      1. suc1
         1. Fission yeast (Schizosaccharomyces pombe) (2)
            in hexamer, the beta-sheets of three dimers form a barrel, closed: n=12, S=12
      2. cks1
         1. Baker's yeast (Saccharomyces cerevisiae) (1)
      3. CksHs2
         1. Human (Homo sapiens) (1)
      4. CksHs1
         1. Human (Homo sapiens) (3)