华南理工大学学报(自然科学版) ›› 2006, Vol. 34 ›› Issue (8): 110-115.

• 食品科学与技术 • 上一篇    下一篇

谷氨酰胺转移酶对食物蛋白质成膜性能的影响

姜燕 温其标 唐传核 杨晓泉   

  1. 华南理工大学 轻工与食品学院,广东广州 510640
  • 收稿日期:2005-09-06 出版日期:2006-08-25 发布日期:2006-08-25
  • 通信作者: 姜燕(1973-),女,博士生,主要从事食品科学研究 E-mail:cljy@163.com
  • 作者简介:姜燕(1973-),女,博士生,主要从事食品科学研究
  • 基金资助:

    国家自然科学基金资助项目(20306008)

Efect of Transglutaminase on Properties of Cast Films from Food Proteins

Jiang Yan  Wen Qi-biao  Tang Chuan-he  Yang Xiao-quan   

  1. School of Usht Industry and Food Sciences,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-09-06 Online:2006-08-25 Published:2006-08-25
  • Contact: 姜燕(1973-),女,博士生,主要从事食品科学研究 E-mail:cljy@163.com
  • About author:姜燕(1973-),女,博士生,主要从事食品科学研究
  • Supported by:

    国家自然科学基金资助项目(20306008)

摘要: 研究了添加谷氨酰胺转移酶(TGase)对大豆分离蛋白(SPI)、酪蛋白酸(NaCN)、明胶、乳清蛋白浓缩物(WPC)、小麦面筋蛋白(WG)及花生分离蛋白(PPI)6种蛋白质成膜特性的影响.研究结果表明:在成膜溶液中加入TGase,蛋白质膜的抗拉强度和表面疏水性有不同程度的改善,其中WG,SPI,NaCN和明胶这4种蛋白质膜的抗拉强度分别增加36.2%.17.7% ,13.1% 和25.6%(P≤0.05);NaCN,SPI,WPC,WG和明胶这5种蛋白质膜的表面疏水性分别增加216.1% ,116.9% ,30.5% ,26.4%和2.45% (P≤0.05);同时
膜的水分含量、总可溶性物质量及透光率也明显降低;明胶膜、NaCN膜和wPC膜的断裂伸长率分别增加16.3% ,72.6% 和172.3%,SPI膜和WG膜的断裂伸长率则分别降低
7.5%和36.2%.电泳分析表明TGase使6种蛋白质均产生了共价交联.

关键词: 谷氨酰胺转移酶, 可食膜, 蛋白质, 成膜性能

Abstract:

The effect of transglutaminase(TGase)treatment on the properties of the cast films from several food proteins including soy protein isolate(SPI),sodium caseinate (NaCN),gelatin,whey protein concentrate (WPC),wheat gluten(WG)and peanut protein isolate(PPI)were investigated.The results indicate that TGase treatment of the film-forming solutions significantly increases the tensile strengths of WG,SPI,NaCN and gelatin films respectively by 36.2% ,17.7% ,13.1% and 25.6% (P≤0.05),enhances the surface hydrophobicities of NaCN-SPI,WPC,WG and gelatin films respectively by 216.1% ,116.9% ,30.5% ,26.4% and 2.4% (P≤0.05),and results in the decrease in the water content,the total soluble matter and the transparency for all films.Also,it leads to an increase in the elongation at break by 16.3% ,72.6% and 172.3% respectively for gelatin,NaCN and WPC films,and a decrease in the elongation at break by 7.5% and 36.2% respectively for SPI and WG films.Moreover,a cross-linking induced by TGase iS finally confirm ed by SDS-PAGE analysis.

Key words: tranglutaminase, edible film, protein, film property