2IH0

NMR structure determination of a synthetic analogue of the iturinic antibiotic bacillomycin Lc


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 31 
  • Selection Criteria: STRUCTURES WITH THE LEAST RESTRAINT VIOLATIONS, STRUCTURES WITH THE LOWEST ENERGY 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

NMR Structure Determination of a Synthetic Analogue of Bacillomycin Lc Reveals the Strategic Role of L-Asn1 in the Natural Iturinic Antibiotics.

Volpon, L.Tsan, P.Majer, Z.Vass, E.Hollosi, M.Noguera, V.Lancelin, J.M.Besson, F.

(2007) Spectrochim Acta A Mol Biomol Spectrosc 67: 1374

  • DOI: 10.1016/j.saa.2006.10.027
  • Primary Citation of Related Structures:  
    2IGZ, 2IH0

  • PubMed Abstract: 
  • Iturins are a group of antifungal produced by Bacillus subtilis. All are cyclic lipopeptides with seven alpha-amino acids of configuration LDDLLDL and one beta-amino fatty acid. The bacillomycin L is a member of this family and its NMR structure was previously resolved using the sequence Asp-Tyr-Asn-Ser-Gln-Ser-Thr ...

    Iturins are a group of antifungal produced by Bacillus subtilis. All are cyclic lipopeptides with seven alpha-amino acids of configuration LDDLLDL and one beta-amino fatty acid. The bacillomycin L is a member of this family and its NMR structure was previously resolved using the sequence Asp-Tyr-Asn-Ser-Gln-Ser-Thr. In this work, we carefully examined the NMR spectra of this compound and detected an error in the sequence. In fact, Asp1 and Gln5 need to be changed into Asn1 and Glu5, which therefore makes it identical to bacillomycin Lc. As a consequence, it now appears that all iturinic peptides with antibiotic activity share the common beta-amino fatty acid 8-L-Asn1-D-Tyr2-D-Asn3 sequence. To better understand the conformational influence of the acidic residue L-Asp1, present, for example in the inactive iturin C, the NMR structure of the synthetic analogue SCP [cyclo (L-Asp1-D-Tyr2-D-Asn3-L-Ser4-L-Gln5-D-Ser6-L-Thr7-beta-Ala8)] was determined and compared with bacillomycin Lc recalculated with the corrected sequence. In both cases, the conformers obtained were separated into two families of similar energy which essentially differ in the number and type of turns. A detailed analysis of both cyclopeptide structures is presented here. In addition, CD and FTIR spectra were performed and confirmed the conformational differences observed by NMR between both cyclopeptides.


    Related Citations: 
    • NMR Structure of Active and Inactive Forms of the Sterol-Dependent Antifungal Antibiotic Bacillomycin L
      Volpon, L., Besson, F., Lancelin, J.M.
      (1999) Eur J Biochem 264: 200

    Organizational Affiliation

    Université Claude Bernard-Lyon 1, Laboratoire de RMN Biomoléculaire, CNRS UMR 5180 Sciences Analytiques, Bâtiment CPE-Lyon, Domaine Scientifique de la Doua, F-69622 Villeurbanne, France.



Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
BACILLOMYCIN L-3A8Bacillus subtilisMutation(s): 3 
Protein Feature View
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  • Reference Sequence
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 1
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000720
Query on PRD_000720
ABACILLOMYCIN L-3Polypeptide / Antibiotic Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 31 
  • Selection Criteria: STRUCTURES WITH THE LEAST RESTRAINT VIOLATIONS, STRUCTURES WITH THE LOWEST ENERGY 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-10-03
    Type: Initial release
  • Version 1.1: 2011-06-14
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2011-07-27
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary
  • Version 1.4: 2012-12-12
    Changes: Other