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

  • 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 ...

    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

    School of Chemistry, Monash University, Clayton 3800, Victoria, Australia.,Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville 3052, Victoria, Australia.,Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville 3052, Victoria, Australia. Electronic address: Ray.Norton@monash.edu.,Department of Biology, University of Utah, Salt Lake City, UT 84112, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
[D-Trp3]-Contryphan-Vc2
A
8Conus victoriaeMutation(s): 0 
Find proteins for W4VSA0 (Conus victoriae)
Go to UniProtKB:  W4VSA0
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A
NON-POLYMERH2 N

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DTR
Query on DTR
A
D-PEPTIDE LINKINGC11 H12 N2 O2

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Experimental Data & Validation

Experimental Data

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

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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