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• W2988123544 startingPage "e0222440" @default.
• W2988123544 abstract "Food allergies are severe immune responses to plant and animal products mediated by immunoglobulin E (IgE). Peanuts (Arachis hypogaea L.) are among the top 15 crops that feed the world. However, peanuts is among the big eight food allergens, and allergies induced by peanuts are a significant public health problem and a life-threatening concern. Targeted mutation studies in peanuts demonstrate that single residue alterations in these allergen proteins could result in substantial reduction in allergenicity. Knowledge of peanut allergen proteins is confined to the allotetraploid crop and its two progenitors. We explored frequencies and positions of natural mutations in the hyperallergenic homologues Ara h 2 and Ara h 6 in newly generated sequences for 24 Arachis wild species and the crop species, assessed potential mutational impact on allergenicity using immunoblots and structural modeling, and evaluated whether these mutations follow evolutionary trends. We uncovered a wealth of natural mutations, both substitutions and gaps, including the elimination of immunodominant epitopes in some species. These molecular alterations appear to be associated with substantial reductions in allergenicity. The study demonstrated that Ara h 2 and Ara h 6 follow contrasting modes of natural selection and opposing mutational patterns, particularly in epitope regions. Phylogenetic analysis revealed a progressive trend towards immunodominant epitope evolution in Ara h 2. The findings provide valuable insight into the interactions among mutations, protein structure and immune system response, thus presenting a valuable platform for future manipulation of allergens to minimize, treat or eliminate allergenicity. The study strongly encourages exploration of genepools of economically important plants in allergenicity research." @default.
• W2988123544 created "2019-11-22" @default.
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• W2988123544 date "2019-11-01" @default.
• W2988123544 modified "2023-09-26" @default.
• W2988123544 title "Molecular evolution of genes encoding allergen proteins in the peanuts genus Arachis: Structural and functional implications" @default.
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• W2988123544 doi "https://doi.org/10.1371/journal.pone.0222440" @default.
• W2988123544 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6824556" @default.
• W2988123544 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31675366" @default.
• W2988123544 hasPublicationYear "2019" @default.
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