Macromolecule Content

• Total Structure Weight: 4746.42 
• Atom Count: 324 
• Residue Count: 42 
• Unique protein chains: 1

1NE5

Solution Structure of HERG Specific Scorpion Toxin CnErg1

• DOI: 10.2210/pdb1NE5/pdb
• BMRB: 5652

• Classification: TOXIN
• Organism(s): Centruroides noxius


• Deposited: 2002-12-10 Released: 2003-04-01 
• Deposition Author(s): Torres, A.M., Paramjit, B., Alewood, P., Kuchel, P.W., Vandenberg, J.I.

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Experimental Data Snapshot

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

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: 12650941 


• 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-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.

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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




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Organizational Affiliation: 

School of Molecular and Microbial Biosciences, University of Sydney, NSW 2006, Australia. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
ergtoxin	A	42	Centruroides noxius	Mutation(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

Entry History 

Deposition Data

• Deposited Date: 2002-12-10 
• Released Date: 2003-04-01 
• Deposition Author(s): Torres, A.M., Paramjit, B., Alewood, P., Kuchel, P.W., Vandenberg, J.I.

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