1AV3

POTASSIUM CHANNEL BLOCKER KAPPA CONOTOXIN PVIIA FROM C. PURPURASCENS, NMR, 20 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST ENERGY AND AGREEMENT WITH EXPERIMENTAL RESTRAINTS 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure and proposed binding mechanism of a novel potassium channel toxin kappa-conotoxin PVIIA.

Scanlon, M.J.Naranjo, D.Thomas, L.Alewood, P.F.Lewis, R.J.Craik, D.J.

(1997) Structure 5: 1585-1597


  • PubMed Abstract: 
  • kappa-PVIIA is a 27-residue polypeptide isolated from the venom of Conus purpurascens and is the first member of a new class of conotoxins that block potassium channels. By comparison to other ion channels of eukaryotic cell membranes, voltage-sensit ...

    kappa-PVIIA is a 27-residue polypeptide isolated from the venom of Conus purpurascens and is the first member of a new class of conotoxins that block potassium channels. By comparison to other ion channels of eukaryotic cell membranes, voltage-sensitive potassium channels are relatively simple and methodology has been developed for mapping their interactions with small-peptide toxins. PVIIA, therefore, is a valuable new probe of potassium channel structure. This study of the solution structure and mode of channel binding of PVIIA forms the basis for mapping the interacting residues at the conotoxin-ion channel interface.


    Related Citations: 
    • Strategy for Rapid Immobilisation of Prey by a Fish Hunting Marine Snail
      Terlau, H.,Shon, K.-J.,Grilley, M.,Stocker, M.,Stuhmer, W.,Olivera, B.M.
      (1996) Nature 381: 148


    Organizational Affiliation

    Centre for Drug Design and Development, University of Queensland, St. Lucia, Australia. m.scanlon@mailbox.uq.edu.au




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
KAPPA-PVIIA
A
27Conus purpurascensN/A
Find proteins for P56633 (Conus purpurascens)
Go to UniProtKB:  P56633
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
HYP
Query on HYP
A
L-PEPTIDE LINKINGC5 H9 N O3PRO
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST ENERGY AND AGREEMENT WITH EXPERIMENTAL RESTRAINTS 
  • Olderado: 1AV3 Olderado
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-10-14
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance