Fold: Nucleoplasmin/PNGase F-like

sandwich; 8 strands in 2 sheets; jelly-roll

Lineage:

1. Root: scop
2. Class: All beta proteins
3. Fold: Nucleoplasmin/PNGase F-like
   sandwich; 8 strands in 2 sheets; jelly-roll

Superfamilies:

1. Nucleoplasmin core (1)
   oligomerises into a pentameric ring structure
2. PHM/PNGase F (2)
   members of this superfamily bind peptide substrates
   duplication: consists of two domains of this fold packed togethe like the adjacent nucleoplasmin subunits
3. Viral proteins (3)
   duplication: consists of two domains of this fold packed together like the nucleoplasmin subunits, form ring structures of six rather than five domains