Fold: Yest killer toxins

beta-alpha-beta(2)-alpha-beta(2); 2 layers, alpha/beta; left-handed crossover connection

Lineage:

1. Root: scop
2. Class: Alpha and beta proteins (a+b)
   Mainly antiparallel beta sheets (segregated alpha and beta regions)
3. Fold: Yest killer toxins
   beta-alpha-beta(2)-alpha-beta(2); 2 layers, alpha/beta; left-handed crossover connection

Superfamilies:

1. Yest killer toxins (2)
   1. Virally encoded KP4 toxin (1)
   2. SMK toxin (1)