5L34

Calculated solution structure of [D-Trp3]-Contryphan-Vc2


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure and activity of contryphan-Vc2: Importance of the d-amino acid residue.

Drane, S.B.Robinson, S.D.MacRaild, C.A.Chhabra, S.Chittoor, B.Morales, R.A.Leung, E.W.Belgi, A.Espino, S.S.Olivera, B.M.Robinson, A.J.Chalmers, D.K.Norton, R.S.

(2017) Toxicon 129: 113-122

  • DOI: 10.1016/j.toxicon.2017.02.012
  • Primary Citation of Related Structures:  
    5L34

  • PubMed Abstract: 
  • In natural proteins and peptides, amino acids exist almost invariably as l-isomers. There are, however, several examples of naturally-occurring peptides containing d-amino acids. In this study we investigated the role of a naturally-occurring d-amino acid in a small peptide identified in the transcriptome of a marine cone snail ...

    In natural proteins and peptides, amino acids exist almost invariably as l-isomers. There are, however, several examples of naturally-occurring peptides containing d-amino acids. In this study we investigated the role of a naturally-occurring d-amino acid in a small peptide identified in the transcriptome of a marine cone snail. This peptide belongs to a family of peptides known as contryphans, all of which contain a single d-amino acid residue. The solution structure of this peptide was solved by NMR, but further investigations with molecular dynamics simulations suggest that its solution behaviour may be more dynamic than suggested by the NMR ensemble. Functional tests in mice uncovered a novel bioactivity, a depressive phenotype that contrasts with the hyperactive phenotypes typically induced by contryphans. Trp3 is important for bioactivity, but this role is independent of the chirality at this position. The d-chirality of Trp3 in this peptide was found to be protective against enzymatic degradation. Analysis by NMR and molecular dynamics simulations indicated an interaction of Trp3 with lipid membranes, suggesting the possibility of a membrane-mediated mechanism of action for this peptide.


    Organizational Affiliation

    Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville 3052, Victoria, Australia. Electronic address: Ray.Norton@monash.edu.



Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
[D-Trp3]-Contryphan-Vc2A8Conus victoriaeMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for W4VSA0 (Conus victoriae)
Explore W4VSA0 
Go to UniProtKB:  W4VSA0
Entity Groups  
UniProt GroupW4VSA0
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 5L34 Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-03-08
    Type: Initial release
  • Version 1.1: 2017-03-15
    Changes: Database references