4BKC

Crystal Structure of a unusually linked dimeric variant of Bet v 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.73 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Stabilization of the Dimeric Birch Pollen Allergen Bet V 1 Impacts its Immunological Properties

Kofler, S.G.Ackaert, C.Samonig, M.Asam, C.Briza, P.Horeis-Hoeck, J.Cabrele, C.Ferreira, F.Duschl, A.Huber, C.Brandstetter, H.

(2014) J.Biol.Chem. 289: 540

  • DOI: 10.1074/jbc.M113.518795
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Many allergens share several biophysical characteristics, including the capability to undergo oligomerization. The dimerization mechanism in Bet v 1 and its allergenic properties are so far poorly understood. Here, we report crystal structures of dim ...

    Many allergens share several biophysical characteristics, including the capability to undergo oligomerization. The dimerization mechanism in Bet v 1 and its allergenic properties are so far poorly understood. Here, we report crystal structures of dimeric Bet v 1, revealing a noncanonical incorporation of cysteine at position 5 instead of genetically encoded tyrosine. Cysteine polysulfide bridging stabilized different dimeric assemblies, depending on the polysulfide linker length. These dimers represent quaternary arrangements that are frequently observed in related proteins, reflecting their prevalence in unmodified Bet v 1. These conclusions were corroborated by characteristic immunologic properties of monomeric and dimeric allergen variants. Hereby, residue 5 could be identified as an allergenic hot spot in Bet v 1. The presented results refine fundamental principles in protein chemistry and emphasize the importance of protein modifications in understanding the molecular basis of allergenicity.


    Organizational Affiliation

    From the Structural Biology Group, Department of Molecular Biology.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MAJOR POLLEN ALLERGEN BET V 1-A
A, B
159Betula pendulaMutation(s): 1 
Gene Names: BETVIA (BETVI)
Find proteins for P15494 (Betula pendula)
Go to UniProtKB:  P15494
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TSY
Query on TSY
A, B
L-peptide linkingC3 H7 N O2 S3CYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.73 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.201 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 39.880α = 90.00
b = 60.950β = 107.47
c = 59.720γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
iMOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-11-27
    Type: Initial release
  • Version 1.1: 2014-01-15
    Type: Database references