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. Metalloprotease, C-terminal domain (1)
   duplication: halfturs of beta-helix are sequence and structural repeats
   1. Metalloprotease, C-terminal domain (2)
      1. Metalloprotease, C-terminal domain
         The catalitic N-terminal domain belong to "zincin" superfamily
         1. Pseudomonas aeruginosa, alkaline protease (2)
         2. Serratia marcescens (4)