1QMR

BIRCH POLLEN ALLERGEN BET V 1 MUTANT N28T, K32Q, E45S, P108G


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Allergy Vaccine Engineering: Epitope Modulation of Recombinant Bet V 1 Reduces Ige Binding But Retains Protein Folding Pattern for Induction of Protective Blocking-Antibody Responses

Holm, J.O.Gajhede, M.Ferreras, M.Henriksen, A.Ipsen, H.Larsen, J.Lund, L.Jacobi, H.Millner, A.Wurtzen, P.Spangfort, M.D.

(2004) J.Immunol. 173: 5258


  • PubMed Abstract: 
  • Human type 1 immediate allergic response symptoms are caused by mediator release from basophils and mast cells. This event is triggered by allergens aggregating preformed IgE Abs bound to the high-affinity receptor (FcepsilonRI) on these cells. Thus, ...

    Human type 1 immediate allergic response symptoms are caused by mediator release from basophils and mast cells. This event is triggered by allergens aggregating preformed IgE Abs bound to the high-affinity receptor (FcepsilonRI) on these cells. Thus, the allergen/IgE interaction is crucial for the cascade leading to the allergic and anaphylactic response. Two genetically engineered forms of the white birch pollen major allergen Bet v 1 with point mutations directed at molecular surfaces have been characterized. Four and nine point mutations led to a significant reduction of the binding to human serum IgE, suggesting a mutation-induced distortion of IgE-binding B cell epitopes. In addition, the mutated allergens showed a decrease in anaphylactic potential, because histamine release from human basophils was significantly reduced. Retained alpha-carbon backbone folding pattern of the mutated allergens was indicated by x-ray diffraction analysis and circular dichroism spectroscopy. The rBet v 1 mutants were able to induce proliferation of T cell lines derived from birch pollen allergic patients. The stimulation indices were similar to the indices of nonmutated rBet v 1 and natural Bet v 1 purified from birch pollen. The ability of anti-rBet v 1 mutant specific mouse IgG serum to block binding of human serum IgE to rBet v 1 demonstrates that the engineered rBet v 1 mutants are able to induce Abs reactive with nonmodified Bet v 1. rBet v 1 mutants may constitute vaccine candidates with improved efficacy/safety profiles for safer allergy vaccination.


    Related Citations: 
    • X-Ray and NMR Structure of Bet V 1, the Origin of Birch Pollen Allergy
      Gajhede, M.,Osmark, P.,Poulsen, F.M.,Ipsen, H.,Larsen, J.N.,Van Neerven, R.J.J.,Schou, C.,Lowenstein, H.,Spangfort, M.D.
      (1996) Nat.Struct.Mol.Biol. 3: 1040


    Organizational Affiliation

    Research Department, ALK-Abelló, Hørsholm, Denmark. jho@dk.alk-abello.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MAJOR POLLEN ALLERGEN BET V 1-A
A
159Betula pendulaMutation(s): 4 
Gene Names: BETVIA (BETVI)
Find proteins for P15494 (Betula pendula)
Go to UniProtKB:  P15494
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.196 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 32.347α = 90.00
b = 74.196β = 90.00
c = 119.548γ = 90.00
Software Package:
Software NamePurpose
CNSphasing
DENZOdata reduction
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-10-12
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-07-05
    Type: Data collection