Cited by 393Glycosylation and Glycoproteins ResearchAllergic Rhinitis and SensitizationFood Allergy and Anaphylaxis Research

The Role of Protein Glycosylation in Allergy

Altmann, Friedrich·2007·International Archives of Allergy and Immunology

Abstract

The asparagine-linked carbohydrate moieties of plant and insect glycoproteins are the most abundant environmental immune determinants. They are the structural basis of what is known as cross-reactive carbohydrate determinants (CCDs). Despite some structural variation, the two main motifs are the xylose and the core-3-linked fucose, which form the essential part of two independent epitopes. Plants contain both epitopes, insect glycoproteins only fucose. These epitopes and other fucosylated determinants are also found in helminth parasites where they exert remarkable immunomodulatory effects. About 20% or more of allergic patients generate specific anti-glycan IgE, which is often accompanied by IgG. Even though antibody-binding glycoproteins are widespread in pollens, foods and insect venoms, CCDs do not appear to cause clinical symptoms in most, if not all patients. When IgE binding is solely due to CCDs, a glycoprotein allergen thus can be rated as clinical irrelevant allergen. Low binding affinity between IgE and plant N-glycans now drops out as a plausible explanation for the benign nature of CCDs. This rather may result from blocking antibodies induced by an incidental ‘immune therapy’ (‘glyco-specific immune therapy’) exerted by everyday contact with plant materials, e.g. fruits or vegetables. The need to detect and suppress anti-CCD IgE without interference from peptide epitopes can be best met by artificial glycoprotein allergens. Hydroxyproline-linked arabinose (single β-arabinofuranosyl residues) has been identified as a new IgE-binding carbohydrate epitope in the major mugwort allergen. However, currently the occurrence of this O-glycan determinant appears to be rather restricted.

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Crossref · 10.1159/000096114

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  • Antibodies specific to carbohydrate determinants are frequently found in many food allergies, particularly to plant proteins, although they appear not to have clinical relevance.

    “In the case of many food allergies, particularly to plant proteins, antibodies specific to carbohydrate determinants are frequently found, although they appear not to have clinical relevance [9].”

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Authors
Altmann, F.
Affiliations
BOKU University (AT)
Corresponding author
Altmann, Friedrich
Venue
International Archives of Allergy and Immunology
Publisher
S. Karger AG
Published
2006-10-09
Volume
142
Issue
2
Pages
99-115
ISSN
  • 1018-2438 (ISSN-L)
  • 1423-0097
OpenAlex
W1976454430
Cited by
393
References
0
Citations by year
2026: 11 · 2025: 10 · 2024: 10 · 2023: 10 · 2022: 5 · 2021: 17 · 2020: 20 · 2019: 17 · 2018: 16 · 2017: 23 · 2016: 21 · 2015: 31 · 2014: 25 · 2013: 33 · 2012: 25
FWCI
1.27
Type
journal article
Language
en
Open access
closed
Locations
  • International Archives of Allergy and Immunology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Glycosylation and Glycoproteins Research
  • Health Sciences › Medicine › Immunology and Allergy › Allergic Rhinitis and Sensitization
  • Health Sciences › Medicine › Immunology and Allergy › Food Allergy and Anaphylaxis Research
Keywords
protein glycosylation, allergy, cross-reactive carbohydrate determinants, N-glycans, helminth immunomodulation, pollen allergens, insect venom, food allergens
MeSH terms
Allergens, Animals, Carbohydrate Conformation, Carbohydrates, Glycoproteins, Glycosylation, Humans, Hypersensitivity

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