1NE5

Solution Structure of HERG Specific Scorpion Toxin CnErg1


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 4000 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure of CnErg1 (Ergtoxin), a HERG specific scorpion toxin

Torres, A.M.Bansal, P.Alewood, P.F.Bursill, J.A.Kuchel, P.W.Vandenberg, J.I.

(2003) FEBS Lett. 539: 138-142


  • PubMed Abstract: 
  • The three-dimensional structure of chemically synthesized CnErg1 (Ergtoxin), which specifically blocks HERG (human ether-a-go-go-related gene) K+ channels, was determined by nuclear magnetic resonance spectroscopy. CnErg1 consists of a triple-strande ...

    The three-dimensional structure of chemically synthesized CnErg1 (Ergtoxin), which specifically blocks HERG (human ether-a-go-go-related gene) K+ channels, was determined by nuclear magnetic resonance spectroscopy. CnErg1 consists of a triple-stranded beta-sheet and an alpha-helix, as is typical of K+ channel scorpion toxins. The peptide structure differs from the canonical structures in that the first beta-strand is shorter and is nearer to the second beta-strand rather than to the third beta-strand on the C-terminus. There is also a large hydrophobic patch on the surface of the toxin, surrounding a central lysine residue, Lys13. We postulate that this hydrophobic patch is likely to form part of the binding surface of the toxin.


    Related Citations: 
    • A toxin to nervous, cardiac, and endocrine ERG K+ channels isolated from Centruroides noxius scorpion venom.
      Gurrola, G.B.,Rosati, B.,Rocchetti, M.,Pimienta, G.,Zaza, A.,Arcangeli, A.,Olivotto, M.,Possani, L.D.,Wanke, E.
      (1999) FASEB J. 13: 953
    • Disulfide bridges of ergtoxin, a member of a new sub-family of peptide blockers of the ether-a-go-go-related K+ channel
      Scaloni, A.,Bottiglieri, C.,Ferrara, L.,Corona, M.,Gurrola, G.B.,Batista, C.,Wanke, E.,Possani, L.D.
      (2000) FEBS Lett. 479: 156


    Organizational Affiliation

    School of Molecular and Microbial Biosciences, University of Sydney, NSW 2006, Australia. a.torres@mmb.usyd.edu.au




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ergtoxin
A
42Centruroides noxiusMutation(s): 0 
Find proteins for Q86QT3 (Centruroides noxius)
Go to UniProtKB:  Q86QT3
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 4000 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 1NE5 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-04-01
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance