SCOP 1.75: Fold a.23: Open three-helical up-and-down bundle

Lineage for Fold a.23: Open three-helical up-and-down bundle

1. Root: SCOP 1.75

2. Class a: All alpha proteins [46456] (284 folds)

3. Fold a.23: Open three-helical up-and-down bundle [47143] (7 superfamilies)
   core: 3 helices; bundle, open

Superfamilies:

1. a.23.1: HSC20 (HSCB), C-terminal oligomerisation domain [47144] (1 family)

2. a.23.2: Diol dehydratase, gamma subunit [47148] (1 family)
   contains irregular N-terminal subdomain

3. a.23.3: Methane monooxygenase hydrolase, gamma subunit [47152] (1 family)
   duplication: consists of two domains of this fold

4. a.23.4: Mitochondrial import receptor subunit Tom20 [47157] (1 family)

5. a.23.5: Hemolysin expression modulating protein HHA [68989] (1 family)

6. a.23.6: EF2458-like [140404] (1 family)
   N-terminal helix swapped dimer; interrupted antiparallel coiled coil

7. a.23.7: YvfG-like [158388] (1 family)

More info for Fold a.23: Open three-helical up-and-down bundle

Timeline for Fold a.23: Open three-helical up-and-down bundle:

• Fold a.23: Open three-helical up-and-down bundle first appeared (with stable ids) in SCOP 1.55
  
• Fold a.23: Open three-helical up-and-down bundle appears in SCOP 1.73
  
• Fold a.23: Open three-helical up-and-down bundle appears in SCOPe 2.01
  
• Fold a.23: Open three-helical up-and-down bundle appears in the current release, SCOPe 2.08