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

  • 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 " ...

    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. This article is protected by copyright. All rights reserved.


    Organizational Affiliation

    Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Alpha-mammal toxin BeM9
A
66Mesobuthus eupeusMutation(s): 0 
Find proteins for P09981 (Mesobuthus eupeus)
Go to UniProtKB:  P09981
Experimental Data & Validation

Experimental Data

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

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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