• 营养卫生 •

### 花生主要过敏原Ara h 1线性B细胞表位的预测及鉴定

1. （中国农业大学食品科学与营养工程学院，食品质量与安全北京实验室，北京 100083）
• 发布日期:2021-09-29
• 基金资助:
国家自然科学基金面上项目（31972185）

### Prediction and Identification of Linear B Cell Epitope on the Major Peanut Allergen Ara h 1

WANG Junjuan, LI Xinrui, CHEN Cheng, SUN Shanfeng, LIU Guirong, CHE Huilian

1. (Beijing Laboratory for Food Quality and Safety, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China)
• Published:2021-09-29

Abstract: Recently, there has been widespread concern about peanut allergy because of the high sensitization rate to peanut and peanut-induced anaphylaxis. Ara h 1 is a major allergen in peanut that belongs to the Cupin superfamily and can trigger peanut allergies through recognizing and binding to immunoglobulin E (IgE). In this study, bioinformatics was used to analyze the amino acid composition of the linear B cell epitope on peanut allergen Ara h 1 and its correlation with the secondary and tertiary structures of the allergen. The digestion resistant peptides in the Ara h 1 sequence were analyzed by mass spectrometry (MS), and the relationship between the peptides and the predicted linear B cell epitopes was analyzed. The results showed that the linear B cell epitope on Ara h 1 was rich in hydrophilic and charged amino acids. In the secondary structure, the epitope showed no regular distribution pattern but with tuning and folding conformations. In the tertiary structure, it was mainly located in the hydrophobic interaction area between the monomers, partly buried in the trimer conformation. There was a partial overlap between the digestion resistant peptide sequence and the predicted epitope. Detecting peptides from simulated gastrointestinal digestion in vitro by MS combined with bioinformatics analysis can be used as a new method to identify the linear B cell epitope on the Cupin superfamily.