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Solution structure of HERG-specific scorpion toxin BeKm-1


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

New binding site on common molecular scaffold provides HERG channel specificity of scorpion toxin BeKm-1.

Korolkova, Y.V.Bocharov, E.V.Angelo, K.Maslennikov, I.V.Grinenko, O.V.Lipkin, A.V.Nosyreva, E.D.Pluzhnikov, K.A.Olesen, S.P.Arseniev, A.S.Grishin, E.V.

(2002) J.Biol.Chem. 277: 43104-43109

  • DOI: 10.1074/jbc.M204083200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The scorpion toxin BeKm-1 is unique among a variety of known short scorpion toxins affecting potassium channels in its selective action on ether-a-go-go-related gene (ERG)-type channels. BeKm-1 shares the common molecular scaffold with other short sc ...

    The scorpion toxin BeKm-1 is unique among a variety of known short scorpion toxins affecting potassium channels in its selective action on ether-a-go-go-related gene (ERG)-type channels. BeKm-1 shares the common molecular scaffold with other short scorpion toxins. The toxin spatial structure resolved by NMR consists of a short alpha-helix and a triple-stranded antiparallel beta-sheet. By toxin mutagenesis study we identified the residues that are important for the binding of BeKm-1 to the human ERG K+ (HERG) channel. The most critical residues (Tyr-11, Lys-18, Arg-20, Lys-23) are located in the alpha-helix and following loop whereas the "traditional" functional site of other short scorpion toxins is formed by residues from the beta-sheet. Thus the unique location of the binding site of BeKm-1 provides its specificity toward the HERG channel.


    Related Citations: 
    • An ERG Channel Inhibitor from the Scorpion Buthus eupeus
      Korolkova, Y.V.,Kozlov, S.A.,Lipkin, A.V.,Pluzhnikov, K.A.,Hadley, J.K.,Filippov, A.K.,Brown, D.A.,Angelo, K.,Strobek, D.,Jespersen, T.,Olesen, S.P.,Jensen, B.S.,Grishin, E.V.
      (2001) J.Biol.Chem. 276: 9868


    Organizational Affiliation

    Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya, 16/10, 117997 Moscow, Russia. july@ibch.ru




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BeKm-1 toxin
A
36Mesobuthus eupeusMutation(s): 0 
Find proteins for Q9BKB7 (Mesobuthus eupeus)
Go to UniProtKB:  Q9BKB7
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-11-20
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance