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

  • DOI: 10.1016/s0014-5793(03)00216-3
  • Primary Citation of Related Structures:  
    1NE5

  • 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ergtoxinA42N/AMutation(s): 0 
Find proteins for Q86QT3 (Centruroides noxius)
Explore Q86QT3 
Go to UniProtKB:  Q86QT3
Protein Feature View
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  • Reference Sequence
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



Entry History 

Deposition Data

Revision History 

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