化工学报 ›› 2016, Vol. 67 ›› Issue (9): 4020-4026.DOI: 10.11949/j.issn.0438-1157.20160046

• 材料化学工程与纳米技术 • 上一篇    

大豆7S球蛋白与葡聚糖共价键合纳米凝胶的制备与表征

冯纪璐, 齐军茹, 翁静宜, 刘倩茹, 曹静, 程萌   

  1. 华南理工大学食品科学与工程学院, 广东 广州 510640
  • 收稿日期:2016-01-11 修回日期:2016-05-06 出版日期:2016-09-05 发布日期:2016-09-05
  • 通讯作者: 齐军茹
  • 基金资助:

    国家自然科学基金项目(31370036);中央高校基本科研业务费专项资金(2015Z2119)。

Preparation and characterization of soy β-conglycinin-dextran nanogels based on Maillard reaction

FENG Jilu, QI Junru, WENG Jingyi, LIU Qianru, CAO Jing, CHENG Meng   

  1. School of Food Science and Technology, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2016-01-11 Revised:2016-05-06 Online:2016-09-05 Published:2016-09-05
  • Supported by:

    supported by the National Natural Science Foundation of China (31370036) and the Fundamental Research Funds for the Central Universities (2015Z2119).

摘要:

基于蛋白质与多糖的Maillard反应与自组装制备一种新型的绿色的具备核壳结构的纳米凝胶。利用干热反应制备大豆7S球蛋白与葡聚糖的共价接枝物(soy β-conglycinin-dextran conjugates,SDC),通过对SDC热处理使其自组装成大豆7S球蛋白-葡聚糖纳米凝胶(soy β-conglycinin-dextran nanogels,SDN),对其形貌、结构及性质进行分析,并利用多糖的空间位阻效应抑制蛋白质宏观过度聚集的理论指导,探讨尺寸均一SDN的形成机制。形貌学与zeta电位分析表明SDN为具备核壳结构的球状粒子,其外壳由亲水性的葡聚糖构成,内核由凝胶化的蛋白构成;表面疏水性分析表明内核蛋白的三级结构发生转变,疏水基团暴露,从而形成多个疏水空腔;稳定性分析表明SDN具有高度的pH稳定性与储存稳定性,对疏水活性物质的输送载体构建具有重要的借鉴意义。

关键词: 大豆7S球蛋白, 葡聚糖, Maillard反应, 自组装, 核壳结构, 纳米凝胶

Abstract:

The novel protein-polysaccharide nanogels were fabricated through a combination of Maillard reaction and self-assembly method, which is facile, safe and green. First, amphiphilic soy β-conglycinin-dextran conjugates (SDC) were prepared by grafting dextran onto soy β-conglycinin via Maillard dry-heating reaction. Then, a heat treatment above the denaturation temperature of protein was used to form soy β-conglycinin-dextran nanogels (SDN). The morphology observation indicated that SDN were of spherical shape with core-shell structures, and the zeta-potential study further verified that soy β-conglycinin was covered with nonionic dextran. The surface hydrophobicity investigation displayed that the conformation of protein was changed and the hydrophobic groups of soy β-conglycinin were exposed to the surface of protein. Therefore, several hydrophobic compartments were formed in the core. The nanogels were pretty stable against long-term storage and pH change. These valuable properties and the low toxicity of nanogels may provide a promising way to deliver hydrophobic compounds.

Key words: soy β-conglycinin, dextran, Maillard reaction, self-assembly, core-shell structure, nanogels

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