6THI

Solution structure of MeuNaTxalpha-1 toxin from Mesobuthus Eupeus

• PDB DOI: https://doi.org/10.2210/pdb6THI/pdb
• BMRB: 34453

• Classification: TOXIN
• Organism(s): Mesobuthus eupeus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2019-11-20 Released: 2020-12-02 
• Deposition Author(s): Mineev, K.S., Kuzmenkov, A.I., Khusainov, G.A., Arseniev, A.S., Vassilevski, A.A.
• Funding Organization(s): Russian Foundation for Basic Research

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 

Literature

Structure of MeuNaTx alpha-1 toxin from scorpion venom highlights the importance of the nest motif.

Mineev, K.S., Kuzmenkov, A.I., Arseniev, A.S., Vassilevski, A.A.

(2021) Proteins 

• PubMed: 33713480 
• DOI: https://doi.org/10.1002/prot.26074
• Primary Citation of Related Structures:  
  6THI


• PubMed Abstract: 
  

  Old world scorpions produce an abundance of toxins called α-NaTx, which interfere with the fast inactivation of voltage-gated sodium channels. Their selectivity to channels of mammals or insects depends on a part of toxin named the specificity module. We report here the spatial structure of a major and broadly active toxin MeuNaTxα-1 from the venom of Mesobuthus eupeus. Notably, its specificity module is markedly different from other α-NaTx with known 3D structure. Close inspection shows that its conformation is a result of an interplay between protein motifs such as the nest and niche, which eventually shape α-NaTx structural diversity.

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Organizational Affiliation: 

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

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 7.2 kDa 
• Atom Count: 499 
• Modelled Residue Count: 64 
• Deposited Residue Count: 64 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Sodium channel neurotoxin MeuNaTxalpha-1	A	64	Mesobuthus eupeus	Mutation(s): 0
UniProt
Find proteins for P86408 (Mesobuthus eupeus) Explore P86408  Go to UniProtKB:  P86408

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2020-12-02 
Deposition Author(s): Mineev, K.S., Kuzmenkov, A.I., Khusainov, G.A., Arseniev, A.S., Vassilevski, A.A.

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Funding Organization	Location	Grant Number
Russian Foundation for Basic Research	Russian Federation	19-54-12015

Revision History  

• Version 1.0: 2020-12-02
  Type: Initial release
  
• Version 1.1: 2021-04-28
  Changes: Database references
• Version 1.2: 2023-06-14
  Changes: Database references, Other