6AX2 | pdb_00006ax2

Solution structure of Magi3 a specific insect toxin from the spider Macrothele gigas

• PDB DOI: https://doi.org/10.2210/pdb6AX2/pdb
• BMRB: 30339

• Classification: TOXIN
• Organism(s): Gigathele gigas
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2017-09-06 Released: 2018-01-10 
• Deposition Author(s): del Rio-Portilla, F., Titaux-Delgado, G.A., Escobedo-Gonzalez, F.C.
• Funding Organization(s): Direccion General del Personal Academico, UNAM

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 12 
• Selection Criteria: structures with the lowest energy 

Literature

Successful refolding and NMR structure of rMagi3: A disulfide-rich insecticidal spider toxin.

Titaux-Delgado, G., Carrillo, E., Mendoza, A., Mayorga-Flores, M., Escobedo-Gonzalez, F.C., Cano-Sanchez, P., Lopez-Vera, E., Corzo, G., Del Rio-Portilla, F.

(2018) Protein Sci 27: 692-701

• PubMed: 29247580 
• DOI: https://doi.org/10.1002/pro.3363
• Primary Citation Related Structures: 
  6AX2


• PubMed Abstract: 
  

  The need for molecules with high specificity against noxious insects leads the search towards spider venoms that have evolved highly selective toxins for insect preys. In this respect, spiders as a highly diversified group of almost exclusive insect predators appear to possess infinite potential for the discovery of novel insect-selective toxins. In 2003, a group of toxins was isolated from the spider Macrothele gigas and the amino acid sequence was reported. We obtained, by molecular biology techniques in a heterologous system, one of these toxins. Purification process was optimized by chromatographic methods to determine the three-dimensional structure by nuclear magnetic resonance in solution, and, finally, their biological activity was tested. rMagi3 resulted to be a specific insect toxin with no effect on mice.

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Organizational Affiliation: 
• Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México, CU, Ciudad de México, 04510, México.
Laboratorio de Toxinología Marina, Unidad Académica de Ecología y Biodiversidad Acuática, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, 04510, México.
División de Ciencias e Ingenierías, Campus León, Universidad de Guanajuato, Loma del Bosque 103, Col. Lomas del Campestre León, Gto, 37150, México.
Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, UNAM, Apartado Postal 510-3, Cuernavaca, Morelos, 61500, México.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 5.24 kDa 
• Atom Count: 358 
• Modeled Residue Count: 46 
• Deposited Residue Count: 46 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Mu-hexatoxin-Mg2a	A	46	Gigathele gigas	Mutation(s): 0
UniProt
Find proteins for P83559 (Macrothele gigas) Explore P83559  Go to UniProtKB:  P83559

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 12 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2018-01-10 
Deposition Author(s): del Rio-Portilla, F., Titaux-Delgado, G.A., Escobedo-Gonzalez, F.C.

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Funding Organization	Location	Grant Number
Direccion General del Personal Academico, UNAM	Mexico	IN207516

Revision History  

• Version 1.0: 2018-01-10
  Type: Initial release
  
• Version 1.1: 2018-01-24
  Changes: Structure summary
• Version 1.2: 2018-01-31
  Changes: Structure summary
• Version 1.3: 2018-02-28
  Changes: Database references
• Version 1.4: 2023-06-14
  Changes: Data collection, Database references, Derived calculations, Other
• Version 1.5: 2024-10-23
  Changes: Data collection, Database references, Structure summary