Liu, Qing, Sui, Zengying, Feng, Nuan, Huang, Yuhao, Li, Yonghong, Ahmed, Ishfaq, Ruethers, Thimo, Liang, Hui, Li, Zhenxing, Lopata, Andreas L., and Sun, Lirui (2024) Characterization, Epitope Confirmation, and Cross-Reactivity Analysis of Parvalbumin from Lateolabrax maculatus by Multiomics Technologies. Journal of Agricultural and Food Chemistry, 72 (36). pp. 20077-20090.

PDF (Author Accepted Version) - Accepted Version Restricted to Repository staff only until 28 August 2025.

Abstract

Spotted seabass (Lateolabrax maculatus) is the second largest maricultural fish species in China and is the main trigger of food-related allergic reactions. Nevertheless, studies on the allergens of L. maculatus are limited. This study aimed to characterize pan-allergen parvalbumin from L. maculatus. Two proteins of about 11 kDa were purified and confirmed as parvalbumins by mass spectrometry. The IgG- and IgE-binding activities were evaluated through an immunoblotting assay. The molecular characteristics of β-parvalbumin were investigated by combining proteomics, genomics, and immunoinformatics approaches. The results indicated that β-parvalbumin consists of 109 amino acids with a molecular weight of 11.5 kDa and is the major allergen displaying strong IgE-binding capacity. In silico analysis and a dot blotting assay confirmed seven linear B cell epitopes distributed mainly on α-helixes and the calcium-binding loops. In addition, the cross-reactivity among 26 commonly consumed fish species was analyzed. The in-house generated anti-L. maculatus parvalbumin polyclonal antibody recognized 100% of the 26 fish species, demonstrating cross-reactivity and better binding capacity than the anticod parvalbumin antibody. Together, this study provides an efficient protocol to characterize allergens with multiomics methods and supports parvalbumin from L. maculatus as a candidate for fish allergen determination and allergy diagnosis.

Item ID:	83953
Item Type:	Article (Research - C1)
ISSN:	1520-5118
Copyright Information:	© 2024 American Chemical Society
Date Deposited:	30 Oct 2024 04:42
FoR Codes:	30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3006 Food sciences > 300605 Food safety, traceability, certification and authenticity @ 30% 31 BIOLOGICAL SCIENCES > 3102 Bioinformatics and computational biology > 310205 Proteomics and metabolomics @ 20% 32 BIOMEDICAL AND CLINICAL SCIENCES > 3204 Immunology > 320401 Allergy @ 50%
SEO Codes:	20 HEALTH > 2001 Clinical health > 200101 Diagnosis of human diseases and conditions @ 50% 10 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 1099 Other animal production and animal primary products > 109903 Fish product traceability and quality assurance @ 50%
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