Three-dimensional structure in lipid micelles of the pediocin-like antimicrobial peptide sakacin P.

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 10 

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Three-Dimensional Structure in Lipid Micelles of the Pediocin-Like Antimicrobial Peptide Sakacin P and a Sakacin P Variant that is Structurally Stabilized by an Inserted C-Terminal Disulfide Bridge

Uteng, M.Hauge, H.H.Markwick, P.R.Fimland, G.Mantzilas, D.Nissen-Meyer, J.Muhle-Goll, C.

(2003) Biochemistry 42: 11417

  • DOI: https://doi.org/10.1021/bi034572i
  • Primary Citation of Related Structures:  
    1OG7, 1OHM, 1OHN

  • PubMed Abstract: 

    The three-dimensional structures in dodecylphosphocholine (DPC) micelles and in trifluoroethanol (TFE) of the pediocin-like antimicrobial peptide sakacin P and an engineered variant of sakacin P (termed sakP[N24C+44C]) have been determined by use of nuclear magnetic resonance spectroscopy. SakP[N24C+44C] has an inserted non-native activity- and structure-stabilizing C-terminal disulfide bridge that ties the C-terminus to the middle part of the peptide. In the presence of DPC, the cationic N-terminal region (residues 1-17) of both peptides has an S-shaped conformation that is reminiscent of a three-stranded antiparallel beta-sheet and that is more pronounced when the peptide was dissolved in TFE instead of DPC. The four positively charged residues located in the N-terminal part are found pointing to the same direction. For both peptides, the N-terminal region is followed by a well-defined central amphiphilic alpha-helix (residues 18-33), and this in turn is followed by the C-terminal tail (residues 34-43 for sakacin P and 34-44 for sakP[N24C+44C]) that lacks any apparent common secondary structural motif. In the presence of DPC, the C-terminal tails in both peptides fold back onto the central alpha-helix, thereby creating a hairpin-like structure in the C-terminal halves. The lack of long-range NOEs between the beta-sheet Nu-terminal region and the hairpin-like C-terminal half indicates that there is a flexible hinge between these regions. We discuss which implications such a structural arrangement has on the interaction with the target cell membrane.

  • Organizational Affiliation

    Department of Biochemistry, University of Oslo, Oslo, Norway.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
BACTERIOCIN SAKACIN P43Latilactobacillus sakeiMutation(s): 0 
Find proteins for P35618 (Latilactobacillus sakei)
Explore P35618 
Go to UniProtKB:  P35618
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP35618
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 10 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-09-22
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance