1SBU

NMR structure of a peptide containing a dimetylthiazolidine : an analog of delta conotoxin EVIA loop 2


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the least restraint violations, structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

A case study of 2,2-dimethylthiazolidine as locked cis proline amide bond: synthesis, NMR and molecular modeling studies of a [small delta]-conotoxin EVIA peptide analog.

Chierici, S.Jourdan, M.Figuet, M.Dumy, P.

(2004) Org Biomol Chem 2: 2437-2441

  • DOI: 10.1039/B408325C
  • Primary Citation of Related Structures:  
    1SBU

  • PubMed Abstract: 
  • The delta-conotoxin EVIA from the Conus ermineus venom, a recently characterized toxin, exhibits cis-trans isomerism of the Leu12-Pro13 bond associated with the triggering of its biological activity. In this paper we use the pseudoproline concept to target the presumed bioactive cis conformation ...

    The delta-conotoxin EVIA from the Conus ermineus venom, a recently characterized toxin, exhibits cis-trans isomerism of the Leu12-Pro13 bond associated with the triggering of its biological activity. In this paper we use the pseudoproline concept to target the presumed bioactive cis conformation. We report the design and the synthesis of loop 2 analogs from residue 8 to 18 containing either the cis-inducing Cys(PsiMe,MePro)13 unit or the natural proline residue. NMR studies in water and molecular modeling allowed us to identify the amide bond "locked" in a cis conformation for as in the suggested bioactive form of the natural toxin.


    Organizational Affiliation

    LEDSS UMR 5616 & ICMG-FR2607, Universite Joseph Fourier, BP 53, 38041, Grenoble cedex 9, France.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
delta-conotoxin EVIAA11Conus ermineusMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
2MT
Query on 2MT
A L-PEPTIDE LINKINGC6 H11 N O2 SPRO
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the least restraint violations, structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-02-24
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2020-06-24
    Changes: Data collection, Database references, Derived calculations, Source and taxonomy, Structure summary