Jug r 6 is the allergenic vicilin present in walnut responsible for IgE cross-reactivities to other tree nuts and seeds
| Autor: | Pawel Dubiela, Stefan Kabasser, Nicolas Smargiasso, Sabine Geiselhart, Merima Bublin, Christine Hafner, Gabriel Mazzucchelli, Karin Hoffmann-Sommergruber |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Scientific Reports Scientific Reports, Vol 8, Iss 1, Pp 1-14 (2018) |
| ISSN: | 2045-2322 |
| Popis: | Walnuts are ranked high in the list of the culprit foods inducing severe allergic reactions. Jug r 2 has been identified as a major allergen in common walnut by cDNA cloning from a somatic cell line. So far, studies were performed on the allergenic activity of recombinant Jug r 2, yet there is still no evidence about the physicochemical characteristics of the natural allergen. Therefore, we aimed to purify and deeply characterize natural Jug r 2 and to assess IgE cross-reactivity among vicilins from different tree nuts. Extensive mass spectrometry analysis of the obtained purified vicilin allowed identification of the protein sequence that displayed only 44% identity to Jug r 2. The newly identified vicilin (Jug r 6) was recognized by IgE of 26% in walnut allergic patients’ sera tested. In contrast to Jug r 2, Jug r 6 displayed a remarkable level of cross-reactivity when tested with homologues from hazelnut, sesame and pistachio. It is the first report showing the necessity of proteomic studies to improve allergy component resolved diagnosis. |
| Databáze: | OpenAIRE |
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