8BO0 | pdb_00008bo0

Solution structure of Lqq4 toxin from Leiurus quinquestriatus quinquestriatus

• PDB DOI: https://doi.org/10.2210/pdb8BO0/pdb
• BMRB: 34771

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


• Deposited: 2022-11-14 Released: 2023-09-20 
• Deposition Author(s): Mineev, K.S., Motov, V.V., Vassilevski, A.A., Chernykh, M.A., Kuzmenkov, A.I.
• Funding Organization(s): Russian Science Foundation

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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

A scorpion toxin affecting sodium channels shows double cis-trans isomerism.

Mineev, K.S., Chernykh, M.A., Motov, V.V., Prudnikova, D.A., Pavlenko, D.M., Kuzmenkov, A.I., Peigneur, S., Tytgat, J., Vassilevski, A.A.

(2023) FEBS Lett 597: 2358-2368

• PubMed: 37501371 
• DOI: https://doi.org/10.1002/1873-3468.14705
• Primary Citation Related Structures: 
  8BO0


• PubMed Abstract: 
  

  Scorpion α-toxins (α-NaTx) inhibiting the inactivation of voltage-gated sodium channels (Na _v ) are a well-studied family of small proteins. We previously showed that the structure of α-NaTx specificity module responsible for selective Na _v binding is governed by an interplay between the nest and niche protein motifs. Here, we report the solution structure of the toxin Lqq4 from the venom of the scorpion Leiurus quinquestriatus. Unexpectedly, we find that this toxin presents an ensemble of long-lived structurally distinct states. We unequivocally assign these states to the alternative configurations (cis-trans isomers) of two peptide bonds: V56-P57 and C17-G18; neither of the cis isomers has been described in α-NaTx so far. We argue that the native conformational space of α-NaTx is wider than assumed previously.

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Organizational Affiliation: 
• Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia.
Moscow Institute of Physics and Technology, Dolgoprudny, Russia.
Toxicology and Pharmacology, KU Leuven, Belgium.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 7.21 kDa 
• Atom Count: 499 
• Modeled Residue Count: 65 
• Deposited Residue Count: 65 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Alpha-toxin Lqq4	A	65	Leiurus quinquestriatus quinquestriatus	Mutation(s): 0
UniProt
Find proteins for P01489 (Leiurus quinquestriatus quinquestriatus) Explore P01489  Go to UniProtKB:  P01489

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: 2023-09-20 
Deposition Author(s): Mineev, K.S., Motov, V.V., Vassilevski, A.A., Chernykh, M.A., Kuzmenkov, A.I.

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Funding Organization	Location	Grant Number
Russian Science Foundation	Russian Federation	20-44-01015

Revision History  

• Version 1.0: 2023-09-20
  Type: Initial release
  
• Version 1.1: 2023-10-04
  Changes: Database references
• Version 1.2: 2024-11-20
  Changes: Database references, Structure summary