Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 24 
  • Selection Criteria: LOWEST ENERGY 

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Mutational Epitope Analysis of Pru Av 1 and Api G 1, the Major Allergens of Cherry (Prunus Avium) and Celery (Apium Graveolens): Correlating Ige Reactivity with Three-Dimensional Structure

Neudecker, P.Lehmann, K.Nerkamp, J.Haase, T.Wangorsch, A.Fotisch, K.Hoffmann, S.Roesch, P.Vieths, S.Scheurer, S.

(2003) Biochem J 376: 97

  • DOI: https://doi.org/10.1042/BJ20031057
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Birch pollinosis is often accompanied by adverse reactions to food due to pollen-allergen specific IgE cross-reacting with homologous food allergens. The tertiary structure of Pru av 1, the major cherry (Prunus avium) allergen, for example, is nearly identical with Bet v 1, the major birch (Betula verrucosa) pollen allergen. In order to define cross-reactive IgE epitopes, we generated and analysed mutants of Pru av 1 and Api g 1.0101, the major celery (Apium graveolens) allergen, by immunoblotting, EAST (enzyme allergosorbent test), CD and NMR spectroscopy. The mutation of Glu45 to Trp45 in the P-loop region, a known IgE epitope of Bet v 1, significantly reduced IgE binding to Pru av 1 in a subgroup of cherry-allergic patients. The backbone conformation of Pru av 1 wild-type is conserved in the three-dimensional structure of Pru av 1 Trp45, demonstrating that the side chain of Glu45 is involved in a cross-reactive IgE epitope. Accordingly, for a subgroup of celery-allergic patients, IgE binding to the homologous celery allergen Api g 1.0101 was enhanced by the mutation of Lys44 to Glu. The almost complete loss of IgE reactivity to the Pru av 1 Pro112 mutant is due to disruption of its tertiary structure. Neither the mutation Ala112 nor deletion of the C-terminal residues 155-159 influenced IgE binding to Pru av 1. In conclusion, the structure of the P-loop partially explains the cross-reactivity pattern, and modulation of IgE-binding by site-directed mutagenesis is a promising approach to develop hypo-allergenic variants for patient-tailored specific immunotherapy.

  • Organizational Affiliation

    Lehrstuhl für Biopolymere, Universitaet Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany. philipp.neudecker@uni-bayreuth.de

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MAJOR ALLERGEN PRU AV 1159Prunus aviumMutation(s): 1 
Gene Names: PRUA1
Find proteins for O24248 (Prunus avium)
Explore O24248 
Go to UniProtKB:  O24248
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO24248
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 24 
  • Selection Criteria: LOWEST ENERGY 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-08-28
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance