Lineage for Family c.23.16.4: Aspartyl dipeptidase PepE

1. Root: SCOPe 2.04

2. Class c: Alpha and beta proteins (a/b) [51349] (148 folds)

3. Fold c.23: Flavodoxin-like [52171] (15 superfamilies) 3 layers, a/b/a; parallel beta-sheet of 5 strand, order 21345

4. Superfamily c.23.16: Class I glutamine amidotransferase-like [52317] (10 families) conserved positions of the oxyanion hole and catalytic nucleophile; different constituent families contain different additional structures

5. Family c.23.16.4: Aspartyl dipeptidase PepE [52331] (1 protein) probable circular permutation in the common core; contains a catalytic Ser-His-Glu triad