Fold: Fe-only hydrogenase

consist of two intertwined domains; contains partial duplication

Lineage:

1. Root: scop
2. Class: Alpha and beta proteins (a/b)
   Mainly parallel beta sheets (beta-alpha-beta units)
3. Fold: Fe-only hydrogenase
   consist of two intertwined domains; contains partial duplication

Superfamilies:

1. Fe-only hydrogenase (1)
   1. Fe-only hydrogenase (2)
      1. Fe-only hydrogenase, catalytic domain
         includes C-terminal region homologous to the smaller subunit of Desulfovidrio hydrogenase
         1. Clostridium pasteurianum (3)
      2. Fe-only hydrogenase larger subunit, C-domain
         1. Desulfovibrio desulfuricans (1)