5MOU

NMR spatial structure of scorpion alpha-like toxin BeM9


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Refined structure of BeM9 reveals arginine hand, an overlooked structural motif in scorpion toxins affecting sodium channels.

Kuldyushev, N.A.Mineev, K.S.Berkut, A.A.Peigneur, S.Arseniev, A.S.Tytgat, J.Grishin, E.V.Vassilevski, A.A.

(2018) Proteins 86: 1117-1122

  • DOI: 10.1002/prot.25583
  • Primary Citation of Related Structures:  
    5MOU

  • PubMed Abstract: 
  • Sodium channel alpha-toxins from scorpion venom (α-NaTx) inhibit the inactivation of voltage-gated sodium channels. We used solution NMR to investigate the structure of BeM9 toxin from Mesobuthus eupeus scorpion, a prototype α-NaTx classified as an "α-like" toxin due to its wide spectrum of activity on insect and mammalian channels ...

    Sodium channel alpha-toxins from scorpion venom (α-NaTx) inhibit the inactivation of voltage-gated sodium channels. We used solution NMR to investigate the structure of BeM9 toxin from Mesobuthus eupeus scorpion, a prototype α-NaTx classified as an "α-like" toxin due to its wide spectrum of activity on insect and mammalian channels. We identified a new motif that we named "arginine hand," whereby arginine side chain forms several hydrogen bonds with main chain atoms. The arginine hand was found in the "specificity module," a part of the molecule that dictates toxin selectivity; and just single arginine-to-lysine point mutation drastically changed BeM9 selectivity profile.


    Organizational Affiliation

    Moscow Institute of Physics and Technology (State University), Moscow, Russia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Alpha-mammal toxin BeM9A66Mesobuthus eupeusMutation(s): 0 
UniProt
Find proteins for P09981 (Mesobuthus eupeus)
Explore P09981 
Go to UniProtKB:  P09981
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the least restraint violations 
  • OLDERADO: 5MOU Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-01-17
    Type: Initial release
  • Version 1.1: 2018-08-29
    Changes: Data collection, Database references
  • Version 1.2: 2018-11-28
    Changes: Data collection, Database references
  • Version 1.3: 2019-02-20
    Changes: Data collection, Structure summary
  • Version 1.4: 2019-05-08
    Changes: Data collection