beta_turn_type_six_a (CURRENT_SVN) |
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SO Accession: | SO:0001151 (SOWiki) |
Definition: | A motif of four consecutive peptide residues, of which the i+2 residue is proline, and 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 ~ 120 degrees. Residue(i+2): phi ~ -90 degrees, psi ~ 0 degrees. |
Synonyms: | beta turn type six a, type VIa beta turn, type VIa turn |
DB Xrefs: | PMID: 2371257 |
SO: cb | |
Parent: | beta_turn_type_six (SO:0001150) |
Children: | beta_turn_type_six_a_two (SO:0001153) |
beta_turn_type_six_a_one (SO:0001152) |
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