Lineage for Family a.39.1.3: Osteonectin

1. Root: SCOP 1.71

2. Class a: All alpha proteins [46456] (226 folds)

3. Fold a.39: EF Hand-like [47472] (4 superfamilies) core: 4 helices; array of 2 hairpins, opened

4. Superfamily a.39.1: EF-hand [47473] (10 families) Duplication: consists of two EF-hand units: each is made of two helices connected with calcium-binding loop

5. Family a.39.1.3: Osteonectin [47489] (1 protein) 5 helices; two EF-hands plus one of additional helices in the N-terminal part