Family: Osteonectin

5 helices; two EF-hands plus one of additional helices in the N-terminal part

Lineage:

1. Root: scop
2. Class: All alpha proteins
3. Fold: EF Hand-like
   core: 4 helices; array of 2 hairpins, opened
4. Superfamily: EF-hand
   Duplication: consists of two EF-hand units: each is made of two helices connected with calcium-binding loop
5. Family: Osteonectin
   5 helices; two EF-hands plus one of additional helices in the N-terminal part

Protein Domains:

1. C-terminal (EC) domain of BM-40/SPARC/osteonectin
   1. Human (Homo sapiens) (3)
      1. 1sra
         this domain only
         complexed with ca
      2. 1nub
         complexed with ca, nag; mutant
         1. region a:136-286
         2. region b:136-286
      3. 1bmo
         complexed with ca, nag
         1. region a:136-286
         2. region b:136-286