3LEU

HIGH RESOLUTION 1H NMR STUDY OF LEUCOCIN A IN DODECYLPHOSPHOCHOLINE MICELLES, 19 STRUCTURES (1:40 RATIO OF LEUCOCIN A:DPC) (0.1% TFA)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 25 
  • Conformers Submitted: 19 
  • Selection Criteria: LEAST RESTRAINT VIOLATION 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Three-dimensional structure of leucocin A in trifluoroethanol and dodecylphosphocholine micelles: spatial location of residues critical for biological activity in type IIa bacteriocins from lactic acid bacteria.

Fregeau Gallagher, N.L.Sailer, M.Niemczura, W.P.Nakashima, T.T.Stiles, M.E.Vederas, J.C.

(1997) Biochemistry 36: 15062-15072

  • DOI: 10.1021/bi971263h
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The first three-dimensional structure of a type IIa bacteriocin from lactic acid bacteria is reported. Complete 1H resonance assignments of leucocin A, a 37 amino acid antimicrobial peptide isolated from the lactic acid bacterium Leuconostoc gelidum ...

    The first three-dimensional structure of a type IIa bacteriocin from lactic acid bacteria is reported. Complete 1H resonance assignments of leucocin A, a 37 amino acid antimicrobial peptide isolated from the lactic acid bacterium Leuconostoc gelidum UAL187, were determined in 90% trifluoroethanol (TFE)-water and in aqueous dodecylphosphocholine (DPC) micelles (1:40 ratio of leucocin A:DPC) using two-dimensional NMR techniques (e.g., DQF-COSY, TOCSY, NOESY). Circular dichroism spectra, NMR chemical shift indices, amide hydrogen exchange rates, and long-range nuclear Overhauser effects indicate that leucocin A adopts a reasonably well defined structure in both TFE and DPC micelle environments but exists as a random coil in water or aqueous DMSO. Distance geometry and simulated annealing calculations were employed to generate structures for leucocin A in both lipophilic media. While some differences were noted between the structures calculated for the two different solvent systems, in both, the region encompassing residues 17-31 assumes an essentially identical amphiphilic alpha-helix conformation. A three-strand antiparallel beta-sheet domain (residues 2-16), anchored by the disulfide bridge, is also observed in both media. In TFE, these two regions have a more defined relationship relative to each other, while, in DPC micelles, the C-terminus is folded back onto the alpha-helix. The implications of these structural features with regard to the antimicrobial mechanism of action and target recognition are discussed.


    Related Citations: 
    • Molecular Characterization of Genes Involved in the Production of the Bacteriocin Leucocin a from Leuconostoc Gelidum
      Van Belkum, M.J.,Stiles, M.E.
      (1995) Appl.Environ.Microbiol. 61: 3573
    • NMR Assignment of Leucocin A, a Bacteriocin from Leuconostoc Gelidum, Supported by a Stable Isotope Labeling Technique for Peptides and Proteins
      Henkel, T.,Sailer, M.,Helms, G.L.,Stiles, M.E.,Vederas, J.C.
      (1992) J.Am.Chem.Soc. 114: 1898
    • Characterization of Leucocin A-Ual 187 and Cloning of the Bacteriocin Gene from Leuconostoc Gelidum
      Hastings, J.W.,Sailer, M.,Johnson, K.,Roy, K.L.,Vederas, J.C.,Stiles, M.E.
      (1991) J.Bacteriol. 173: 7491
    • 15N-and 13C-Labeled Media from Anabaena Sp. For Universal Isotopic Labeling of Bacteriocins: NMR Resonance Assignments of Leucocin a from Leuconostoc Gelidum and Nisin a from Lactococcus Lactis
      Sailer, M.,Helms, G.L.,Henkel, T.,Niemczura, W.P.,Stiles, M.E.,Vederas, J.C.
      (1993) Biochemistry 32: 310


    Organizational Affiliation

    Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LEUCOCIN A
A
37Leuconostoc gelidumMutation(s): 0 
Gene Names: lcnA
Find proteins for P34034 (Leuconostoc gelidum)
Go to UniProtKB:  P34034
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 25 
  • Conformers Submitted: 19 
  • Selection Criteria: LEAST RESTRAINT VIOLATION 
  • Olderado: 3LEU Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-11-26
    Type: Initial release
  • Version 1.1: 2008-03-25
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance