Fold: beta-Roll

contains a parallel beta-helix that binds calcium ions between its turns

Lineage:

1. Root: scop
2. Class: All beta proteins
3. Fold: beta-Roll
   contains a parallel beta-helix that binds calcium ions between its turns

Superfamilies:

1. Serralysin-like metalloprotease, C-terminal domain (1)
   duplication: halfturs of beta-helix are sequence and structural repeats
   1. Serralysin-like metalloprotease, C-terminal domain (4)
      1. Metalloprotease
         The catalitic N-terminal domain belong to the "zincin" superfamily
         1. Pseudomonas aeruginosa (3)
            alkaline protease
         2. Serratia marcescens (4)
            serralysin
         3. Erwinia chrysanthemi (5)
            protease C
         4. Pseudomonas sp., tac ii 18 (2)
            psychrophilic alkaline protease