Lineage for Species: African clawed frog (Xenopus laevis) [TaxId: 8355]

1. Root: SCOP 1.73

2. Class d: Alpha and beta proteins (a+b) [53931] (334 folds)

3. Fold d.294: EndoU-like [142876] (1 superfamily) comprises several helices and two three-stranded antiparallel beta-sheets; similar architecture to the RNase A-like fold (scop_cf 54075)

4. Superfamily d.294.1: EndoU-like [142877] (2 families) similarity to the RNase A-like superfamily (scop_sf 54076) extends to the active site location and architecture; the two structural cores of the RNase A and EndoU superfamilies are interrelated by a topological permutation - transposition of two pereferial beta-strands, suggesting possible distant homology of the two superfamilies (and their unification in a hyperfamily)

5. Family d.294.1.1: Eukaryotic EndoU ribonuclease [142878] (1 protein) PfamB 010233; common fold decorated with additional structures

6. Protein EndoU [142879] (1 species)

7. Species African clawed frog (Xenopus laevis) [TaxId:8355] [142880] (1 PDB entry)