1OMC

SOLUTION STRUCTURE OF OMEGA-CONOTOXIN GVIA USING 2-D NMR SPECTROSCOPY AND RELAXATION MATRIX ANALYSIS


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 21 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Solution structure of omega-conotoxin GVIA using 2-D NMR spectroscopy and relaxation matrix analysis.

Davis, J.H.Bradley, E.K.Miljanich, G.P.Nadasdi, L.Ramachandran, J.Basus, V.J.

(1993) Biochemistry 32: 7396-7405


  • PubMed Abstract: 
  • We report here the solution structure of omega-conotoxin GVIA, a peptide antagonist of the N-type neuronal voltage-sensitive calcium channel. The structure was determined using two-dimensional NMR in combination with distance geometry and restrained ...

    We report here the solution structure of omega-conotoxin GVIA, a peptide antagonist of the N-type neuronal voltage-sensitive calcium channel. The structure was determined using two-dimensional NMR in combination with distance geometry and restrained molecular dynamics. The full relaxation matrix analysis program MARDIGRAS was used to generate maximum and minimum distance restraints from the crosspeak intensities in NOESY spectra. The 187 restraints obtained were used in conjunction with 23 angle restraints from vicinal coupling constants as input for the structure calculations. The backbones of the best 21 structures match with an average pairwise RMSD of 0.58 A. The structures contain a short segment of triple-stranded beta-sheet involving residues 6-8, 18-21, and 24-27, making this the smallest published peptide structure to contain a triple-stranded beta-sheet. Conotoxins have been shown to be effective neuroprotective agents in animal models of brain ischemia. Our results should aid in the design of novel nonpeptide compounds with potential therapeutic utility.


    Related Citations: 
    • Purification and Sequence of a Presynaptic Peptide Toxin from Conus Geographus Venom
      Olivera, B.M.,Mcintosh, J.M.,Cruz, L.J.,Luque, F.A.,Gray, W.R.
      (1984) Biochemistry 23: 5087
    • Neuronal Calcium Channel Inhibitors
      Rivier, J.,Galyean, R.,Gray, W.R.,Azimi-Zonooz, A.,Mcintosh, J.M.,Cruz, L.J.,Olivera, B.M.
      (1987) J.Biol.Chem. 262: 1194


    Organizational Affiliation

    Graduate Group in Biophysics, University of California, San Francisco 94143-0446.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
OMEGA-CONOTOXIN GVIA
A
28Conus geographusN/A
Find proteins for P01522 (Conus geographus)
Go to UniProtKB:  P01522
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A
NON-POLYMERH2 N

--

HYP
Query on HYP
A
L-PEPTIDE LINKINGC5 H9 N O3PRO
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 21 
  • Olderado: 1OMC Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-01-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other