Solution NMR of synthetic analogues of nisin and mutacin ring A and ring B - nisin ring A

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 150 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

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Molecular Recognition of Lipid II by Lantibiotics: Synthesis and Conformational Studies of Analogues of Nisin and Mutacin Rings A and B.

Dickman, R.Mitchell, S.A.Figueiredo, A.M.Hansen, D.F.Tabor, A.B.

(2019) J Org Chem 84: 11493-11512

  • DOI: https://doi.org/10.1021/acs.joc.9b01253
  • Primary Citation of Related Structures:  
    6QM1, 6QTF, 6QYR, 6QYS, 6QYT, 6QYU, 6QYV, 6QYW

  • PubMed Abstract: 

    In response to the growing threat posed by antibiotic-resistant bacterial strains, extensive research is currently focused on developing antimicrobial agents that target lipid II, a vital precursor in the biosynthesis of bacterial cell walls. The lantibiotic nisin and related peptides display unique and highly selective binding to lipid II. A key feature of the nisin-lipid II interaction is the formation of a cage-like complex between the pyrophosphate moiety of lipid II and the two thioether-bridged rings, rings A and B, at the N-terminus of nisin. To understand the important structural factors underlying this highly selective molecular recognition, we have used solid-phase peptide synthesis to prepare individual ring A and B structures from nisin, the related lantibiotic mutacin, and synthetic analogues. Through NMR studies of these rings, we have demonstrated that ring A is preorganized to adopt the correct conformation for binding lipid II in solution and that individual amino acid substitutions in ring A have little effect on the conformation. We have also analyzed the turn structures adopted by these thioether-bridged peptides and show that they do not adopt the tight α-turn or β-turn structures typically found in proteins.

  • Organizational Affiliation

    Department of Chemistry , University College London , 20 Gordon Street , London WC1H 0AJ , U.K.


Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ILE-DBU-DAL-ILE-DHA-LEU-CYS-ALA8Lactococcus lactisMutation(s): 0 
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  2 Unique
IDChains TypeFormula2D DiagramParent
Query on DBU
Query on DHA
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 150 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Engineering and Physical Sciences Research CouncilUnited KingdomEP/L504889/1

Revision History  (Full details and data files)

  • Version 1.0: 2019-09-11
    Type: Initial release
  • Version 1.1: 2019-10-02
    Changes: Data collection, Database references