食品科学 ›› 2026, Vol. 47 ›› Issue (7): 101-108.doi: 10.7506/spkx1002-6630-20251018-096

• 生物工程 • 上一篇    下一篇

应用噬菌体展示随机七肽库筛选花生Ara h 5蛋白的模拟表位

王俊娟,秦培友,王丹,赵圆圆,彭郁,赵晓燕,车会莲   

  1. (1.北京市农林科学院农产品加工与食品营养研究所,果蔬农产品保鲜与加工北京市重点实验室,农业农村部蔬菜采后处理重点实验室,北京 100097;2.中国农业大学食品科学与营养工程学院,北京 100083)
  • 出版日期:2026-04-15 发布日期:2026-05-08
  • 基金资助:
    国家自然科学基金青年科学基金项目(32402246);北京市农林科学院青年科研基金项目(QNJJ202412); 北京市农林科学院2025年度国际科技合作平台建设专项(GHPT2025-05)

Screening for Mimotopes for the Peanut Allergen Ara h 5 Using a Phage Display Random Heptapeptide Library

WANG Junjuan, QIN Peiyou, WANG Dan, ZHAO Yuanyuan, PENG Yu, ZHAO Xiaoyan, CHE Huilian   

  1. (1. Beijing Key Laboratory of Fruits and Vegetable Storage and Processing, Key Laboratory of Vegetable Postharvest Processing, Ministry of Agriculture and Rural Affairs, Institute of Agri-food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; 2. College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, China)
  • Online:2026-04-15 Published:2026-05-08

摘要: 利用噬菌体展示随机七肽库筛选花生Ara h 5蛋白的模拟表位。本研究通过原核表达体系获得的Ara h 5蛋白作为免疫原,利用小鼠动物模型制备抗Ara h 5蛋白抗体,通过亲和层析从免疫鼠血清中纯化抗Ara h 5蛋白多克隆IgE抗体后,以其为靶标,进行3 轮噬菌体展示七肽文库的亲和筛选,对阳性噬菌体克隆进行测序,结果获得了3 条Ara h 5的模拟表位,分别为FHWWYLK、WETIYSR、GPLWNVN。这些模拟表位为开发针对花生过敏的阻断抗体或表位特异性免疫疗法提供了重要基础。

关键词: 花生过敏;Ara?h?5;噬菌体展示技术;模拟表位

Abstract: This study aimed to screen for mimotopes for the peanut allergen Ara h 5 using a phage display random heptapeptide library. Recombinant Ara h 5, obtained via a prokaryotic expression system, was used as an immunogen to generate antibodies in a mouse model. Polyclonal IgE antibodies against Ara h 5 were purified from the antiserum by affinity chromatography. Using these Ara h 5 IgE antibodies as the target, three rounds of biopanning were performed against the phage display heptapeptide library. Positive phage clones were isolated and sequenced. Three mimotope sequences, FHWWYLK, WETIYSR, and GPLWNVN, were identified. These mimotopes provide an important foundation for the development of blocking antibodies or epitope-specific immunotherapy for peanut allergy.

Key words: peanut allergy; Ara h 5; phage display technology; mimotope

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