Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report | Predict Membrane 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 0.86 kDa 
• Atom Count: 59 
• Modelled Residue Count: 8 
• Deposited Residue Count: 8 
• Unique protein chains: 1

5L34

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

• PDB DOI: 10.2210/pdb5L34/pdb
• BMRB: 30152

• Classification: TOXIN
• Organism(s): Conus victoriae
• Mutation(s): No 
• Membrane Protein: Yes  OPM


• Deposited: 2016-08-03 Released: 2017-03-08 
• Deposition Author(s): Drane, S.B., Chhabra, S., MacRaild, C.A.

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Experimental Data Snapshot

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

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

• PubMed: 28216409 
• 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. 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.

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Organizational Affiliation: 

Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville 3052, Victoria, Australia. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
[D-Trp3]-Contryphan-Vc2	A	8	Conus victoriae	Mutation(s): 0  Membrane Entity: Yes
UniProt
Find proteins for W4VSA0 (Conus victoriae) Explore W4VSA0  Go to UniProtKB:  W4VSA0

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

Entry History 

Deposition Data

• Deposited Date: 2016-08-03 
• Released Date: 2017-03-08 
Deposition Author(s): Drane, S.B., Chhabra, S., MacRaild, C.A.

Revision History  

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