2J23

Cross-reactivity and crystal structure of Malassezia sympodialis Thioredoxin (Mala s 13), a member of a new pan-allergen family


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.41 Å
  • R-Value Free: 0.168 
  • R-Value Work: 0.140 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Cross-Reactivity and 1.4-A Crystal Structure of Malassezia Sympodialis Thioredoxin (Mala S 13), a Member of a New Pan-Allergen Family.

Limacher, A.Glaser, A.G.Meier, C.Schmid-Grendelmeier, P.Zeller, S.Scapozza, L.Crameri, R.

(2007) J.Immunol. 178: 389

  • DOI: 10.4049/jimmunol.178.1.389

  • PubMed Abstract: 
  • We have identified thioredoxins (Trx) of Malassezia sympodialis, a yeast involved in the pathogenesis of atopic eczema, and of Aspergillus fumigatus, a fungus involved in pulmonary complications, as novel IgE-binding proteins. We show that these Trx, ...

    We have identified thioredoxins (Trx) of Malassezia sympodialis, a yeast involved in the pathogenesis of atopic eczema, and of Aspergillus fumigatus, a fungus involved in pulmonary complications, as novel IgE-binding proteins. We show that these Trx, including the human enzyme, represent cross-reactive structures recognized by serum IgE from individuals sensitized to M. sympodialis Trx. Moreover, all three proteins were able to elicit immediate-type allergic skin reactions in sensitized individuals, indicating a humoral immune response based on molecular mimicry. To analyze structural elements involved in these reactions, the three-dimensional structure of M. sympodialis Trx (Mala s 13) has been determined at 1.4-A resolution by x-ray diffraction analysis. The structure was solved by molecular replacement and refined to a crystallographic R factor of 14.0% and a free R factor of 16.8% and shows the typical Trx fold. Mala s 13 shares 45% sequence identity with human Trx and superposition of the solved Mala s 13 structure with those of human Trx reveals a high similarity with a root mean square deviation of 1.11 A for all Calpha atoms. In a detailed analysis of the molecular surface in combination with sequence alignment, we identified conserved solvent-exposed amino acids scattered over the surface in both structures which cluster to patches, thus forming putative conformational B cell epitopes potentially involved in IgE-mediated cross- and autoreactivity.


    Organizational Affiliation

    Swiss Institute of Allergy and Asthma Research (SIAF), Davos, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
THIOREDOXIN
A, B
121Malassezia sympodialisMutation(s): 0 
Gene Names: mala s 13
Find proteins for Q1RQI9 (Malassezia sympodialis)
Go to UniProtKB:  Q1RQI9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.41 Å
  • R-Value Free: 0.168 
  • R-Value Work: 0.140 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 37.496α = 90.00
b = 51.986β = 99.49
c = 53.023γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
DENZOdata reduction
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-11-22
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance