Fold: alpha/beta-Hammerhead

core: beta-BETA-alpha-beta-BETA-beta-alpha; contains a beta-hammerhead motif similar to that in barrel-sandwich hybrids

Lineage:

1. Root: scop
2. Class: Alpha and beta proteins (a+b)
   Mainly antiparallel beta sheets (segregated alpha and beta regions)
3. Fold: alpha/beta-Hammerhead
   core: beta-BETA-alpha-beta-BETA-beta-alpha; contains a beta-hammerhead motif similar to that in barrel-sandwich hybrids

Superfamilies:

1. CO dehydrogenase molybdoprotein N-domain-like (1)
2. Quinolinic acid phosphoribosyltransferase, N-terminal domain (1)
3. Pyrimidine nucleoside phosphorylase C-terminal domain (1)
4. Ribosomal protein L10e (1)
5. Molybdopterin synthase subunit MoaE (1)