Identification and mutational analysis of continuous, immunodominant epitopes of the major oyster allergen Crag 1
Identification and mutational analysis of continuous, immunodominant epitopes of the major oyster allergen Crag 1
复制标题
主要牡蛎过敏原 Crag 1 的连续免疫显性表位的鉴定和突变分析
DOI：
10.1016/j.clim.2019.02.008
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发表时间：
2019-04-01
影响因子：
8.6
通讯作者：
Lu, Jun
中科院分区：
文献类型：
--
作者：
Fang, Lei;Li, Guoming;Lu, Jun
Shellfish, including oysters, often cause allergic reactions in children and adults. Oysters are inevitably consumed because of its delicacy and nutritional benefit, leading to frequent occurrence of severe clinical symptoms observed in patients with oyster hypersensitivity. We aimed to identify the immunodominant epitopes of oyster tropomyosin and crucial amino acids for IgE binding, which will help us to further understand the immunochemical characteristics of Cra g 1. The potential epitopes were predicted by immunoinformatics tools and the resultant immunodominant epitopes were identified by inhibition ELISA with pooled sera and individual serum from oyster allergic patients. Surprisingly, homologous substitution of multiple amino acids led to obviously decrease affinity of IgE antibodies, but this manner did not abrogate binding completely. Five major linear epitopes were evenly distributed on the surface of homology-based Cra g 1 model and hydrophilic residues appeared to be the most important for IgE binding. These results not only offer a better understanding of the molecular mechanism of interaction between Cra g 1 and oyster-specific IgE but also have significance in clinical diagnosis and immunotherapy.
