皮革科学与工程 ›› 2023, Vol. 33 ›› Issue (1): 1-8.doi: 10.19677/j.issn.1004-7964.2023.01.001

• 试验研究 •    下一篇

牛跟腱胶原与草鱼皮胶原的结构表征及自组装行为比较

秦子波1, 余小月1, 乐薇1, 荣建华1, 熊善柏1, 胡杨1,2,3,4,*   

  1. 1.华中农业大学食品科学技术学院,湖北 武汉 430070;
    2.华中农业大学交叉科学研究院,湖北 武汉 430070;
    3.国家大宗淡水鱼加工技术研发分中心(武汉),湖北 武汉 430070;
    4.华中农业大学深圳营养与健康研究院,湖北 武汉 430070
  • 收稿日期:2022-05-20 出版日期:2023-02-01 上线日期:2023-01-04
  • 通讯作者: *胡杨(1987-),男,副教授,博士生导师,研究方向为水产品加工及副产物高值化利用。E-mail: huyang@mail.hzau.edu.cn。
  • 作者简介:秦子波(1998-),男,硕士研究生,研究方向为水产品加工及副产物高值化利用。E-mail: qinzibo1998@163.com。
  • 基金资助:
    湖北省自然科学基金面上项目(2022CFB162); 华中农业大学-中国农业科学院深圳农业基因组研究所合作基金(SZYJY2021009); 现代农业产业技术体系专项资金(CARS-45-48)

Comparison of the Structures and Self-assembly Behaviors of Collagens Extracted from Bovine Achilles Tendon and Grass Carp Skin

QIN Zibo1, YU Xiaoyue1, YUE Wei1, RONG Jianhua1, XIONG Shanbai1, HU Yang1,2,3,4,*   

  1. 1. College of Food Science and Technology, Huazhong Agriculture University, Wuhan 430070, China;
    2. Interdisciplinary Sciences Institute, Huazhong Agricultural University, Wuhan 430070, China;
    3. The Sub Center (Wuhan) of National Technology and R&D of Staple Freshwater Fish Processing, Wuhan 430070, China;
    4. Shenzhen Institute of Nutrition and Health, Huazhong Agricultural University, Wuhan 430070, China
  • Received:2022-05-20 Online:2023-02-01 Published:2023-01-04

摘要: 以牛跟腱和草鱼皮为原料,采用“酸-酶”结合法提取I型胶原,研究两种胶原的结构特性及其自组装行为差异。结果表明:牛跟腱胶原和草鱼皮胶原均具有I型胶原的典型结构特点,具有相似的相对分子质量和二级结构,但氨基酸含量有所差异,其中牛跟腱胶原亚氨基酸(脯氨酸+胫脯氨酸)含量要高于草鱼皮胶原。胶原的自组装结果表明,当胶原质量浓度为2 mg/mL、温度为37 ℃时胶原自组装速率最高。而当温度过高(>42 ℃)时,相比牛跟腱胶原,草鱼皮胶原的组装受到更大地抑制,这可能归因于牛跟腱胶原中更多的亚氨基酸含量赋予了其更好的热稳定性。此外,增大胶原浓度可以提升胶原凝胶的存储模量,整体而言,牛跟腱胶原凝胶的存储模量优于草鱼皮胶原凝胶。

关键词: 胶原, 结构表征, 自组装, 动力学

Abstract: Type I collagen was separately extracted from bovine achilles tendon and grass carp (Ctenopharyngodon Idella) skin by using the acid-enzyme combination method. The structural properties and self-assembly behavior of the two collagens were investigated. Results showed that both collagens had the typical structural characteristics of type I collagen. The two collagens had similar molecular weight and secondary structure but were different in amino acid contents. The content of imino acids (proline+hydroproline) in bovine achilles tendon collagen was higher than that of grass carp skin collagen. The results of collagen self-assembly experiments showed that the highest self-assembly rate was achieved when the collagen concentration was 2 mg/mL and the temperature was 37 ℃. However, the assembly of collagen from grass carp skin was more inhibited than that of bovine achilles tendon collagen when the temperature was too high (> 42 ℃), which might be attributed to the higher thermal stability of bovine achilles tendon collagen induced by its higher content of imino acids. Besides, the storage modulus of collagen hydrogel was promoted with increasing collagen concentration, and generally collagen hydrogels’ performance derived from bovine achilles tendon was superior to that from grass carp skin.

Key words: collagen, structural characterization, self-assembly, kinetics

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