食品科学 ›› 2012, Vol. 33 ›› Issue (17): 284-289.

• 专题论述 • 上一篇    下一篇

食物过敏原结构变化的光谱学研究进展

白雨鑫1,2,李 欣1,2,赵丽霞3,陈红兵1,4,高金燕1,2,*   

  1. 1.南昌大学 食品科学与技术国家重点实验室 2.南昌大学生命科学与食品工程学院食品系 3.江西省食品工业研究所 4.南昌大学中德联合研究院
  • 收稿日期:2011-08-31 修回日期:2012-07-17 出版日期:2012-09-15 发布日期:2012-11-09
  • 通讯作者: 高金燕 E-mail:gjychb@hotmail.com
  • 基金资助:

    国家自然科学基金项目;教育部新世纪优秀人才支持计划;南昌大学食品科学与技术国家重点实验室目标导向项目

Progress in Spectroscopic Research on Structural Changes of Food Allergens

  • Received:2011-08-31 Revised:2012-07-17 Online:2012-09-15 Published:2012-11-09

摘要: 光谱学方法已广泛应用于研究食物过敏原结构的变化。常用的光谱学方法包括圆二色光谱、荧光光谱、傅里叶变换红外光谱、拉曼光谱、紫外吸收光谱等,其中圆二色光谱仅应用于澄清的稀溶液中,常研究过敏原二级、三级结构变化;傅里叶变换红外光谱不受过敏原相对分子质量大小、光散射以及荧光的影响,其酰胺Ⅰ带对于过敏原二级结构的研究最有价值;拉曼光谱采用光子探针,对微克级样品无损伤探测,适用于稀有、珍贵样品;荧光光谱多用于研究过敏原在变性过程中疏水性以及微环境变化;紫外吸收光谱在结构鉴定中需与其他光谱方法密切配合。前3种方法均可以确定过敏原二级结构的类型和相对含量,各方法的具体应用仍然值得进一步探索。

关键词: 蛋白结构, 光谱学, 过敏原, 食物过敏

Abstract: Spectroscopy has been widely used in the investigation of structural change of food allergens. The commonly used spectroscopic techniques include circular dichroism (CD), fluorescence spectroscopy, Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and UV absorption spectroscopy. CD is often used to define the change in secondary and tertiary structures of allergens, but is restricted to clear low-concentration solutions only. FTIR can override influence of allergen molecular weight, light scattering and fluorescent light. FTIR amide I band is the most valuable for the analysis of secondary structure of allergens. Raman spectroscopy with photon probe is suitable for non-destructive detection of rare and precious microgram-scale samples. Fluorescence spectroscopy is often used to define hydrophobic and microenvironmental changes of allergens in the course of denaturation, and UV absorption spectroscopy needs to be coordinated closely with other spectroscopic methods for structural identification. In addition, CD, fluorescence spectroscopy and FTIR are available for characterizing the type and relative content of secondary structure of food allergens, and their specific applications are still worthy of further exploration.

Key words: protein structure, spectroscopy, allergen, food allergy

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