7LXK | pdb_00007lxk

Ara h 1 leader sequence, Ara h 1.0101 (25-83) A25G

• PDB DOI: https://doi.org/10.2210/pdb7LXK/pdb
• BMRB: 30875

• Classification: ALLERGEN
• Organism(s): Arachis hypogaea
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2021-03-03 Released: 2022-03-09 
• Deposition Author(s): Mueller, G., London, R.
• Funding Organization(s): National Institutes of Health/National Institute of Environmental Health Sciences (NIH/NIEHS)

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 20 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Structure, Immunogenicity, and IgE Cross-Reactivity among Walnut and Peanut Vicilin-Buried Peptides.

Foo, A.C.Y., Nesbit, J.B., Gipson, S.A.Y., Cheng, H., Bushel, P., DeRose, E.F., Schein, C.H., Teuber, S.S., Hurlburt, B.K., Maleki, S.J., Mueller, G.A.

(2022) J Agric Food Chem 70: 2389-2400

• PubMed: 35139305 
• DOI: https://doi.org/10.1021/acs.jafc.1c07225
• Primary Citation Related Structures: 
  7LVE, 7LVF, 7LVG, 7LXK


• PubMed Abstract: 
  

  Vicilin-buried peptides (VBPs) from edible plants are derived from the N-terminal leader sequences (LSs) of seed storage proteins. VBPs are defined by a common α-hairpin fold mediated by conserved CxxxCx _(10-14) CxxxC motifs. Here, peanut and walnut VBPs were characterized as potential mediators of both peanut/walnut allergenicity and cross-reactivity despite their low (∼17%) sequence identity. The structures of one peanut (AH1.1) and 3 walnut (JR2.1, JR2.2, JR2.3) VBPs were solved using solution NMR, revealing similar α-hairpin structures stabilized by disulfide bonds with high levels of surface similarity. Peptide microarrays identified several peptide sequences primarily on AH1.1 and JR2.1, which were recognized by peanut-, walnut-, and dual-allergic patient IgE, establishing these peanut and walnut VBPs as potential mediators of allergenicity and cross-reactivity. JR2.2 and JR2.3 displayed extreme resilience against endosomal digestion, potentially hindering epitope generation and likely contributing to their reduced allergic potential.

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Organizational Affiliation: 
• National Institute of Environmental Health Sciences, 111 T.W. Alexander Dr, MD-MR01, Research Triangle Park, North Carolina 27615, United States.
US Department of Agriculture─Agricultural Research Service, 1100 Robert E. Lee Blvd., New Orleans, Louisiana 70122, United States.
Department of Biochemistry and Molecular Biology, Institute for Human Infections and Immunity, University of Texas Medical Branch, 301 University Blvd., Galveston, Texas 77555, United States.
University of California Davis School of Medicine, 2315 Stockton Blvd., Sacramento, California 95817, United States.

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: 6.73 kDa 
• Atom Count: 466 
• Modeled Residue Count: 59 
• Deposited Residue Count: 59 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Allergen Ara h 1, clone P41B	A	59	Arachis hypogaea	Mutation(s): 1
UniProt
Find proteins for P43238 (Arachis hypogaea) Explore P43238  Go to UniProtKB:  P43238

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 20 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2022-03-09 
Deposition Author(s): Mueller, G., London, R.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of Environmental Health Sciences (NIH/NIEHS)	United States	Z01-ES102885-01

Revision History  

• Version 1.0: 2022-03-09
  Type: Initial release
  
• Version 1.1: 2023-03-22
  Changes: Database references
• Version 1.2: 2024-10-23
  Changes: Data collection, Database references, Structure summary