Fold: Subtilisin-like

3 layers: a/b/a, parallel beta-sheet of 7 strands, order 2314567; left-handed crossover connection between strands 2 & 3

Lineage:

1. Root: scop
2. Class: Alpha and beta proteins (a/b)
   Mainly parallel beta sheets (beta-alpha-beta units)
3. Fold: Subtilisin-like
   3 layers: a/b/a, parallel beta-sheet of 7 strands, order 2314567; left-handed crossover connection between strands 2 & 3

Superfamilies:

1. Subtilisin-like (2)
   1. Subtilases (12)
      1. Subtilisin
         1. Bacillus subtilis, carlsberg (4)
         2. Bacillus subtilis, E (1)
         3. Bacillus licheniformis (15)
         4. Bacillus lentus, savinase (TM) (1)
         5. Bacillus lentus (7)
         6. Bacillus amyloliquefaciens, Novo/BPN' (30)
      2. Messentericopeptidase
         1. Bacillus mesentericus (1)
      3. M-proteinase
         1. Bacillus sp., strain ksm-k16 (1)
      4. Serine protease PB92
         1. Bacillus alcalophilus (1)
      5. Thermostable serine protease
         1. Bacillus sp., AK.1 (1)
      6. Thermitase
         1. Thermoactinomyces vulgaris (4)
      7. Proteinase K
         1. Fungus (Tritirachium album), strain limber (8)
   2. Serine-carboxyl proteinase PSCP (1)
      elaborated with additional structures
      1. Serine-carboxyl proteinase PSCP
         1. Pseudomonas sp. (3)