Protein: Subtilisin from Bacillus subtilis, carlsberg

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
4. Superfamily: Subtilisin-like
5. Family: Subtilases
6. Protein: Subtilisin
7. Species: Bacillus subtilis, carlsberg

PDB Entry Domains:

1. 1cse
   complexed with ca
   1. chain e
2. 2sec
   complexed with ca
   1. chain e
3. 1sel
   complexed with ca, sec; mutant
   1. chain a
   2. chain b
4. 1sbc
   complexed with ca