2MSO

Solution study of cGm9a


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Transforming conotoxins into cyclotides: Backbone cyclization of P-superfamily conotoxins.

Akcan, M.Clark, R.J.Daly, N.L.Conibear, A.C.de Faoite, A.Heghinian, M.D.Sahil, T.Adams, D.J.Mari, F.Craik, D.J.

(2015) Biopolymers 104: 682-692

  • DOI: 10.1002/bip.22699
  • Primary Citation of Related Structures:  2MSQ

  • PubMed Abstract: 
  • Peptide backbone cyclization is a widely used approach to improve the activity and stability of small peptides but until recently it had not been applied to peptides with multiple disulfide bonds. Conotoxins are disulfide-rich conopeptides derived fr ...

    Peptide backbone cyclization is a widely used approach to improve the activity and stability of small peptides but until recently it had not been applied to peptides with multiple disulfide bonds. Conotoxins are disulfide-rich conopeptides derived from the venoms of cone snails that have applications in drug design and development. However, because of their peptidic nature, they can suffer from poor bioavailability and poor stability in vivo. In this study two P-superfamily conotoxins, gm9a and bru9a, were backbone cyclized by joining the N- and C-termini with short peptide linkers using intramolecular native chemical ligation chemistry. The cyclized derivatives had conformations similar to the native peptides showing that backbone cyclization can be applied to three disulfide-bonded peptides with cystine knot motifs. Cyclic gm9a was more potent at high voltage-activated (HVA) calcium channels than its acyclic counterpart, highlighting the value of this approach in developing active and stable conotoxins containing cyclic cystine knot motifs.


    Organizational Affiliation

    Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, 4072, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Conotoxin Gm9.1
A
30Conus gloriamarisN/A
Find proteins for Q9GU57 (Conus gloriamaris)
Go to UniProtKB:  Q9GU57
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-07-22
    Type: Initial release
  • Version 1.1: 2015-12-09
    Type: Database references
  • Version 1.2: 2016-02-03
    Type: Database references