Fold: His-Me finger endonucleases

core: (alpha)-beta-omega_loop-beta-alpha; embeded in larger different structures

Lineage:

1. Root: scop
2. Class: Alpha and beta proteins (a+b)
   Mainly antiparallel beta sheets (segregated alpha and beta regions)
3. Fold: His-Me finger endonucleases
   core: (alpha)-beta-omega_loop-beta-alpha; embeded in larger different structures

Superfamilies:

1. His-Me finger endonucleases (4)
   common motif contains conserved histidine residue and metal-binding site
   1. HNH-motif (2)
   2. Sm endonuclease (1)
      the core motif is inserted in a six-stranded meander beta-sheet domain
   3. Cys-His box (1)
   4. Recombination endonuclease VII (1)