食品科学 ›› 2021, Vol. 42 ›› Issue (18): 1-6.doi: 10.7506/spkx1002-6630-20200901-001

• 食品化学 •    下一篇

橙皮素与铁蛋白的共价相互作用及其对铁蛋白理化性质的影响

陈盛楠,刘玉茜,刘梦肴,孙冀萱,杨瑞   

  1. (食品营养与安全教育部重点实验室,天津科技大学食品科学与工程学院,天津 300457)
  • 发布日期:2021-09-29
  • 基金资助:
    国家自然科学基金面上项目(31972067);天津市自然科学基金面上项目(20JCYBJC00020)

Covalent Interaction between Hesperidin and Ferritin and Its Effect on Physicochemical Properties of Ferritin

CHEN Shengnan, LIU Yuqian, LIU Mengyao, SUN Jixuan, YANG Rui   

  1. (Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China)
  • Published:2021-09-29

摘要: 以缺铁的铁蛋白和橙皮素为原料,在pH 9条件下制备铁蛋白-橙皮素共价复合物,探讨共价结合对蛋白结构和理化性质的影响。结果表明,橙皮素与铁蛋白的共价作用降低了铁蛋白的荧光强度并产生红移现象,改变了铁蛋白的结构。铁蛋白-橙皮素共价复合物的溶解度改变,等电点降低,其铁氧化沉淀活性提高,铁的还原释放活性降低。同时,共价复合物的热稳定性增强。铁蛋白-橙皮素复合物的形成赋予了铁蛋白新的功能特性,对探究食品组分相互作用,开发基于铁蛋白的相关食品或药品具有一定的理论指导。

关键词: 铁蛋白;橙皮素;共价作用;结构;功能性质

Abstract: In this study, a ferritin-hesperetin covalent complex was prepared from apoferritin and hesperetin at pH 9. The effect of covalent interaction on the structural and physicochemical properties of ferritin was explored. The results showed that the covalent interaction with hesperetin reduced the fluorescence intensity of ferritin and resulted in a red shift in the fluorescence spectrum, changing ferritin structure. After binding with hesperetin, the solubility of ferritin was changed, and the isoelectric point was decreased. The oxidative deposition of iron was enhanced and the reductive release of iron from ferritin was decreased. Additionally, the thermal stability of the covalent complex was enhanced compared with that of ferritin. In conclusion, covalent modification with hesperetin can endow ferritin with new functional properties, which is of great significance to the development of ferritin-based foods or drugs.

Key words: ferritin; hesperetin; covalent interaction; structure; functional properties

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