Exploration of digestion-resistant immunodominant epitopes in shrimp (Penaeus vannamei) allergens.

Abstract

The digestion products of Penaeus vannamei still had sensitizing and eliciting capacity; however, the underlying mechanism has not been identified. This study analyzed the structural changes of shrimp proteins during digestion, predicted the linearmimotopepeptides and first validated the allergenicity of immunodominantepitopes with binding ability. The results showed that the shrimp proteins were gradually degraded into small peptides during digestion, which might lead to the destruction of linear epitopes. However, these peptides carried IgE epitopes that still trigger allergic reactions. Eighteen digestion-resistant epitopes were predicted by multiple immunoinformatics tools and digestomics. Five epitopes contained more critical amino acids and had strong molecular docking (P1: DSGVGIYAPDAEA, P2: EGELKGTYYPLTGM, P3: GRQGDPHGKFDLPPGV, P4: IFAWPHKDNNGIE, P5: KSTESSVTVPDVPSIHD), and these epitopes were identified as novel IgE binding immunodominantepitopes in Penaeus vannamei. These findings provide novel insight into allergenic epitopes, which might serve as key targets for reducing the allergenicity in shrimp.

• Authors: Yao Liu, Songyi Lin, Kexin Liu, Shan Wang, Qiaozhen Liu, Na Sun
• Journal: Food chemistry (Food Chem) Vol. 438 Pg. 137920 (Apr 16 2024) ISSN: 1873-7072 [Electronic] England
• PMID: 38000156 (Publication Type: Journal Article)
• Copyright: Copyright © 2023 Elsevier Ltd. All rights reserved.

Chemical References

• Immunodominant Epitopes
• Allergens
• Immunoglobulin E
• Peptides
• Epitopes
• Tropomyosin

Topics

• Animals
• Penaeidae
• Amino Acid Sequence
• Immunodominant Epitopes
• Allergens (chemistry)
• Molecular Docking Simulation
• Immunoglobulin E
• Peptides
• Epitopes (chemistry)
• Digestion
• Tropomyosin (chemistry)