The solution NMR structure of brevinin-1BYa in sodium dodecyl sulphate micelles

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

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Structural and positional studies of the antimicrobial peptide brevinin-1BYa in membrane-mimetic environments.

Timmons, P.B.O'Flynn, D.Conlon, J.M.Hewage, C.M.

(2019) J Pept Sci 25: e3208-e3208

  • DOI: https://doi.org/10.1002/psc.3208
  • Primary Citation of Related Structures:  
    6G4I, 6G4K, 6G4U

  • PubMed Abstract: 

    Brevinin-1BYa (FLPILASLAAKFGPKLFCLVTKKC), first isolated from skin secretions of the foothill yellow-legged frog Rana boylii, shows broad-spectrum activity, being particularly effective against opportunistic yeast pathogens. The structure of brevinin-1BYa was investigated in various solution and membrane-mimicking environments by proton nuclear magnetic resonance ( 1 H-NMR) spectroscopy and molecular modelling. The peptide does not possess a secondary structure in aqueous solution. In a 33% 2,2,2-trifluoroethanol (TFE-d 3 )-H 2 O solvent mixture, as well as in membrane-mimicking sodium dodecyl sulfate and dodecylphosphocholine micelles, the peptide's structure is characterised by a flexible helix-hinge-helix motif, with the hinge located at the Gly 13 /Pro 14 residues, and the two α-helices extending from Pro 3 to Phe 12 and from Pro 14 to Thr 21 . Positional studies involving the peptide in sodium dodecyl sulfate and dodecylphosphocholine micelles using 5-doxyl-labelled stearic acid and manganese chloride paramagnetic probes show that the peptide's helical segments lie parallel to the micellar surface, with the residues on the hydrophobic face of the amphipathic helices facing towards the micelle core and the hydrophilic residues pointing outwards, suggesting that the peptide exerts its biological activity by a non-pore-forming mechanism.

  • Organizational Affiliation

    UCD School of Biomolecular and Biomedical Science, UCD Centre for Synthesis and Chemical Biology, UCD Conway Institute, University College Dublin, Dublin, Ireland.


Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Brevinin-1BYa24Rana boyliiMutation(s): 0 
Find proteins for P84111 (Rana boylii)
Explore P84111 
Go to UniProtKB:  P84111
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP84111
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-10-09
    Type: Initial release
  • Version 1.1: 2019-11-27
    Changes: Database references
  • Version 1.2: 2023-06-14
    Changes: Database references, Other