Class: Coiled coil proteins

Lineage:

1. Root: scop
2. Class: Coiled coil proteins

Folds:

1. Parallel coiled-coil (19)
   this is not a true fold; includes oligomers of shorter identical helices
2. Tetramerization domain of the Mnt repressor (1)
3. Stalk segment of viral fusion proteins (3)
   core: trimeric coiled coil
4. Antiparallel coiled-coil (6)
   this is not a true fold; contains at least two very long antiparallel helices
5. Apolipoprotein A-i (1)
   tetrameric antiparallel coiled coil, closed in a circuit