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Updated: Nov 1, 2025

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Profilin, a Novel Plant Pan-Allergen.

Rudolf Valenta, Michael Duchêne, Susanne Vrtala

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    Profilins, proteins controlling cell structure, are identified as common plant allergens. This discovery explains cross-reactivity in allergies to unrelated plant species.

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    Area of Science:

    • Plant biology
    • Allergen research
    • Molecular biology

    Background:

    • Profilins regulate actin polymerization and signal transduction in eukaryotes.
    • Previously, profilins were not known to exist in plants.
    • Birch profilin shares sequence homology with profilins from other eukaryotic organisms.

    Purpose of the Study:

    • To investigate the presence and function of profilins in plants.
    • To determine if profilins act as pan-allergens in plants.
    • To understand the molecular basis of cross-reactivity between distantly related plant species in allergic patients.

    Main Methods:

    • Sequence homology analysis
    • Identification of profilins in various plant species
    • Allergenicity assessment

    Main Results:

    • Profilins were identified as ubiquitous in distantly related plants.
    • These plant profilins function as functional pan-allergens.
    • The findings provide a molecular explanation for cross-sensitization.

    Conclusions:

    • Profilins are functional pan-allergens present across diverse plant species.
    • The ubiquitous nature of profilin allergens explains cross-reactivity in plant allergies.
    • This research offers insights into plant allergenicity and cross-sensitization mechanisms.