Folds:

1. h.1: Parallel coiled-coil [57943] (28 superfamilies) this is not a true fold; includes oligomers of shorter identical helices

2. h.2: Tetramerization domain of the Mnt repressor [58058] (1 superfamily)

3. h.3: Stalk segment of viral fusion proteins [58063] (3 superfamilies) core: trimeric coiled coil

4. h.4: Antiparallel coiled-coil [58086] (16 superfamilies) this is not a true fold; contains at least two very long antiparallel helices

5. h.5: Apolipoprotein A-I [58112] (1 superfamily) tetrameric antiparallel coiled coil, closed in a circuit

6. h.6: Apolipoprotein A-II [82935] (1 superfamily) segmented tetrameric parallel coiled coil

More info for Class h: Coiled coil proteins

Timeline for Class h: Coiled coil proteins:

• Class h: Coiled coil proteins first appeared (with stable ids) in SCOP 1.55
  
• Class h: Coiled coil proteins appears in SCOP 1.67
  
• Class h: Coiled coil proteins appears in SCOP 1.71
  
• Class h: Coiled coil proteins appears in the current release, SCOPe 2.08