8AHK | pdb_00008ahk

Solution NMR structure of AG41, a 41-amino acid insecticidal protein extracted from Medicago truncatula

• PDB DOI: https://doi.org/10.2210/pdb8AHK/pdb
• BMRB: 34742

• Classification: PLANT PROTEIN
• Organism(s): Medicago truncatula
• Mutation(s): No 


• Deposited: 2022-07-21 Released: 2023-05-31 
• Deposition Author(s): Jouvensal, L., Loth, K.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Literature

Residues of Legume AG41 Peptide Crucial to Its Bio-Insecticidal Activity.

Diya, F., Jouvensal, L., Rahioui, I., Loth, K., Sivignon, C., Karaki, L., Kfoury, L., Rizk, F., Da Silva, P.

(2023) Biomolecules 13

• PubMed: 36979381 
• DOI: https://doi.org/10.3390/biom13030446
• Primary Citation Related Structures: 
  8AHK


• PubMed Abstract: 
  

  Currently, crop protection relies heavily on chemical treatments, which ultimately leads to environmental contamination and pest resistance. Societal and public policy considerations urge the need for new eco-friendly solutions. In this perspective, biopesticides are effective alternatives to chemical insecticides for the control of various insect pests. Legumes contain numerous insecticidal proteins aimed at protecting their high nitrogen content from animal/insect predation. Investigating one such protein family at genome scale, we discovered a unique diversity of the albumin 1 family in the (model) barrel medic genome. Only some members retained very high insecticidal activity. We uncovered that AG41 peptide from the alfalfa roots displays an outstanding insecticidal activity against several pests such as aphids and weevils. Here we report the 3D structure and activity of AG41 peptide. Significant insights into the structural/functional relationships explained AG41 high insecticidal activity. Such observations pave the way for the development of bio-insecticides, with AG41 peptide as the lead compound.

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Organizational Affiliation: 
• INSA-Lyon, INRA, BF2I, UMR0203, Université de Lyon, 69621 Villeurbanne, France.
Plant Protection Department, Faculty of Agronomy, Lebanese University, Dekwaneh P.O. Box 146404, Lebanon.
Innovative Therapeutic Laboratory, Branch II, Department of Life and Earth Sciences, Faculty of Sciences, Lebanese University, Beirut P.O. Box 146404, Lebanon.
Centre de Biophysique Moléculaire, CNRS UPR 4301, 45071 Orléans, France.
UFR Sciences et Techniques, Université d'Orléans, 45071 Orléans, France.
INSA Lyon, INRAE, BF2I, UMR 203, Université de Lyon, 69621 Villeurbanne, France.
Department of Biological and Chemical Sciences, Lebanese International University, Beirut P.O. Box 146404, Lebanon.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: NMR Distance Restraints

Macromolecule Content 

• Total Structure Weight: 4.29 kDa 
• Atom Count: 297 
• Modeled Residue Count: 41 
• Deposited Residue Count: 41 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
AG41	A	41	Medicago truncatula	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2023-05-31 
Deposition Author(s): Jouvensal, L., Loth, K.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2023-05-31
  Type: Initial release
  
• Version 1.1: 2024-10-16
  Changes: Data collection, Database references, Structure summary