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IgE-reactive 60 kDa glycoprotein occurring in wheat flour
J Watanabe1, S Tanabe, K Sonoyama
1Graduate School of Agriculture, Hokkaido University, Sapporo, Japan.
Bioscience, Biotechnology, and Biochemistry
|October 26, 2001
Summary
A novel 60 kDa glycoprotein from wheat flour binds to IgE antibodies. Enzymatic treatment significantly reduced this IgE-binding activity, paving the way for hypoallergenic flour production.
Area of Science:
- Food science
- Allergen research
- Biochemistry
Background:
- Wheat flour contains allergens that trigger IgE-mediated immune responses.
- Identification and characterization of specific allergens are crucial for developing hypoallergenic food products.
Purpose of the Study:
- To isolate and characterize a novel IgE-reactive glycoprotein from wheat flour.
- To investigate the effect of enzymatic treatment on the IgE-binding capacity of the isolated glycoprotein for hypoallergenic flour development.
Main Methods:
- Isolation of a 60 kDa glycoprotein from wheat flour.
- Determination of the N-terminal amino acid sequence.
- Enzymatic treatment to assess changes in IgE-binding activity.
Main Results:
- A new 60 kDa IgE-reactive glycoprotein was identified.
- The N-terminal sequence was determined as LDPDESEXVTRYFRIR, with an asparagine residue at position 8 linked to a glycochain.
- Enzymatic treatment effectively reduced the IgE-binding activity of the glycoprotein.
Conclusions:
- A specific IgE-binding glycoprotein in wheat flour has been characterized.
- Enzymatic modification offers a viable strategy for reducing the allergenicity of wheat flour.