Fold: Monooxygenase (hydroxylase) regulatory protein

corner-like structure formed by two sheets and filled in with 2-3 helices

Lineage:

1. Root: scop
2. Class: Alpha and beta proteins (a+b)
   Mainly antiparallel beta sheets (segregated alpha and beta regions)
3. Fold: Monooxygenase (hydroxylase) regulatory protein
   corner-like structure formed by two sheets and filled in with 2-3 helices

Superfamilies:

1. Monooxygenase (hydroxylase) regulatory protein (1)
   duplication: consists of two beta-alpha-(beta)-beta(2) motifs; some topological similarity to the ferredoxin-like fold
   1. Monooxygenase (hydroxylase) regulatory protein (3)
      note: the solution structure determinations disagree in the relative orientations of two motifs
      1. Soluble methane monooxygenase regulatory protein B
         1. Escherichia coli (1)
         2. Methylosinus trichosporium (1)
      2. Phenol hydroxylase P2 protein
         1. Pseudomonas sp., CF600 (1)