Narrow Leafed Lupin Beta-Conglutin Proteins Epitopes Identification and Molecular Features Analysis Involved in Cross-Allergenicity to Peanut and Other Legumes

Elena Lima-Cabello, Paula Robles-Bolivar, Juan D. Alché, Jose C. Jimenez-Lopez

GCB, Vol. 2, No. 1 (2016): e29


Abstract


The use of narrow leafed lupin - NLL (Lupinus angustifolius L.) as a new food is resulting in an increasing number of allergic reactions cases, particularly in atopic patients with other pre-existing legume allergies. In the current study, we have performed an extensive in silico analysis of the NLL seed β-conglutin proteins, a new family of major allergen proteins identified in NLL, and a comparison to other relevant food allergens such as peanut Ara h 1. We analysed the variability of surface residues involved in conformational IgE-binding epitopes, lineal B- and T-cell epitopes, and changes in 2-D structural elements and 3D motives, with the aim to investigate cross-allergenicity among lupin, peanut, and other different legumes. Our results revealed that considerable structural differences exist, particularly affecting 2-D elements (loops and coils), and numerous micro-heterogeneities are present in fundamental residues directly involved in epitopes differential variability. Thus, variability of residues involved in IgE-binding epitopes might be a major contributor to the observed differences in cross-allergenicity among legumes.

Keywords


B-/T-cell epitopes; Computational Biology; Food Allergen proteins; Homology Modeling; IgE-binding Epitopes; Immunotherapy; Lupinus angustifolius; L. albus; L. luteus; Legume; PULSE; Vicilins

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DOI: http://dx.doi.org/10.18547/gcb.2016.vol2.iss1.e29

Copyright (c) 2016 Jose C. Jimenez-Lopez

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