Stabilization of the dimeric birch pollen allergen Bet v 1 impacts its immunological properties

Titel in Übersetzung: Stabilization of the dimeric birch pollen allergen Bet v 1 impacts its immunological properties

Stefan Kofler, Chloé Ackaert, Martin Samonig, Claudia Asam, Peter Briza, Jutta Horejs-Hoeck, Chiara Cabrele, Fatima Ferreira, Albert Duschl, Christian Huber, Hans Brandstetter

    Publikation: Beitrag in FachzeitschriftArtikel

    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 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.

    OriginalspracheEnglisch
    Seiten (von - bis)540-551
    Seitenumfang12
    FachzeitschriftJournal of Biological Chemistry
    Jahrgang289
    Ausgabenummer1
    DOIs
    PublikationsstatusVeröffentlicht - 3 Jan 2014

    Bibliographische Notiz

    289(1)

    Systematik der Wissenschaftszweige 2012

    • 106 Biologie
    • 302 Klinische Medizin

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