Identification of a New IgE-Binding Epitope of Peanut Oleosin That Cross-Reacts with Buckwheat
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- KOBAYASHI Shoko
- Research Center for Food Safety, Graduate School of Agricultural and Life Sciences, The University of Tokyo
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- KATSUYAMA Shinta
- Research Center for Food Safety, Graduate School of Agricultural and Life Sciences, The University of Tokyo
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- WAGATSUMA Tamae
- Department of Food and Life Science, Takasaki University of Health and Welfare
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- OKADA Shinji
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo
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- TANABE Soichi
- Graduate School of Biosphere Science, Hiroshima University
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Abstract
Peanut and buckwheat induce a severe allergic reaction, anaphylaxis, which is considered to be mediated by immunoglobulin E (IgE). We identified in this study a new IgE-binding epitope of the peanut allergen that cross-reacted with buckwheat. The phosphate-buffered saline-soluble fraction of buckwheat inhibited the binding between IgE and the peanut allergen. A cross-reactive peptide was isolated from the α-chymotrypsin hydrolysate of peanut. Based on the amino acid sequence and mass spectrometric analysis data, the peptide was identified as Ser-Asp-Gln-Thr-Arg-Thr-Gly-Tyr (SDQTRTGY); this sequence is identical to amino acids 2–9 in the N-terminal hydrophilic domain of oleosin 3 which is located on the surface of the lipid storage body. Synthetic SDQTRTGY was found to bind with IgE in the sera of all eight peanut-allergic patients tested. Since many foods of plant origin contain oleosin, the possibility of an anaphylactic cross-reaction in allergic patients should always be considered.
Journal
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- Bioscience, Biotechnology, and Biochemistry
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Bioscience, Biotechnology, and Biochemistry 76 (6), 1182-1188, 2012
Japan Society for Bioscience, Biotechnology, and Agrochemistry
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Keywords
Details 詳細情報について
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- CRID
- 1390001206478067072
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- NII Article ID
- 10030818299
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- NII Book ID
- AA10824164
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- COI
- 1:STN:280:DC%2BC38jps1GgsQ%3D%3D
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- ISSN
- 13476947
- 09168451
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- NDL BIB ID
- 023768462
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- PubMed
- 22790944
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed