Fold: beta-clip

double-stranded ribbon sharply bent in two places; the ribbon ends form incomplete barrel; jelly-roll

Lineage:

1. Root: scop
2. Class: All beta proteins
3. Fold: beta-clip
   double-stranded ribbon sharply bent in two places; the ribbon ends form incomplete barrel; jelly-roll

Superfamilies:

1. Type III antifreeze protein (1)
   duplication: consists of two structural repeats related by pseudodyad
2. Head decoration protein D (gpD, major capsid protein D) (1)
3. Urease, beta-subunit (1)
4. Deoxyuridine 5'-triphosphate nucleotidohydrolase (dUTPase) (1)
   forms tight trimer through an additional beta-sheet in each subunit
   subunit beta-sheets are orthogonally packed around the three-fold axis
5. ACMNPV telokin-like protein (1)
   similar to dUTPase in fold and trimeric assembly