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Homology modelling of the major peanut allergen Ara h 2 and surface mapping of IgE-binding epitopes

Homology modelling of the major peanut allergen Ara h 2 and surface mapping of IgE-binding epitopes,10.1016/j.imlet.2005.03.014,Immunology Letters,Ann

Homology modelling of the major peanut allergen Ara h 2 and surface mapping of IgE-binding epitopes   (Citations: 12)
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Three-dimensional models built for the peanut Ara h 2 allergen and other structurally-related 2S albumin allergens of dietary nuts exhibited an overall three-dimensional fold stabilized by disulphide bridges well conserved among all the members of the 2S albumin superfamily. Conformational analysis of the linear IgE-binding epitopes mapped on the molecular surface of Ara h 2 showed no structural homology with the corresponding regions of the walnut Jug r 1, the pecan nut Car i 1 or the Brazil nut Ber e 1 allergens. The absence of epitopic community does not support the allergenic cross-reactivity observed between peanut and walnut or Brazil nut, which presumably depends on other ubiquitous seed storage protein allergens, namely the vicilins. However, the major IgE-binding epitope identified on the molecular surface of the walnut Jug r 1 allergen shared a pronounced structural homology with the corresponding region of the pecan nut Car i 1 allergen. With the exception of peanut, 2S albumins could thus account for the IgE-binding cross-reactivity observed between some other dietary nuts, e.g. walnut and pecan nut.
Journal: Immunology Letters - IMMUNOL LETT , vol. 100, no. 2, pp. 153-158, 2005
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