beta_turn_type_eight
A motif of four consecutive peptide residues that may contain one H-bond, which, if present, is between the main-chain CO of the first residue and the main-chain NH of the fourth and is characterized by the dihedral angles: Residue(i+1): phi ~ -60 degrees, psi ~ -30 degrees. Residue(i+2): phi ~ -120 degrees, psi ~ 120 degrees.
SO:0001133
beta_turn
is_a
beta turn type eight
exact
type VIII beta turn
exact
type VIII turn
exact