食品科学 ›› 2018, Vol. 39 ›› Issue (16): 289-294.doi: 10.7506/spkx1002-6630-201816041

• 工艺技术 • 上一篇    下一篇

响应面优化谷氨酰胺转氨酶改性大豆与啤酒糟混合蛋白工艺

宗绪岩1,2,李?建1,2,彭翠珍1,李?丽1,*   

  1. (1.四川理工学院生物工程学院,四川?自贡 643000;2.酿酒生物技术及应用四川省重点实验室,四川?自贡 643000)
  • 出版日期:2018-08-25 发布日期:2018-08-17
  • 基金资助:
    肉类加工四川省重点实验室开放基金项目(16R-16);固态酿造关键技术研究四川省院士(专家)工作站开放 基金项目(GY2014-01);四川理工学院创新基金资助项目(y2016004)

Applying Response Surface Methodology to Optimize Transglutaminase Modification of Brewer’s Spent Grains Protein and Soybean Protein Mixtures

ZONG Xuyan1,2, LI Jian1,2, PENG Cuizhen1, LI Li1,*   

  1. (1. College of Bioengineering, Sichuan University of Science & Engineering, Zigong 643000, China; 2. Sichuan Provincial Key Lab of Liquor-marking Biotech & Application, Zigong 643000, China)
  • Online:2018-08-25 Published:2018-08-17

摘要: 为改善啤酒糟蛋白的凝胶性能及氨基酸组成,采用单因素试验及响应面试验研究谷氨酰胺转氨酶改性啤酒糟与大豆蛋白混合的最优工艺条件,探讨啤酒糟蛋白添加量、加酶量、水浴温度、水浴时间和pH值对混合蛋白凝胶性能的影响。结果表明,湿磨法所得啤酒糟蛋白的蛋白质质量分数为52.23%,其氨基酸组成以Glu、Pro为主,而酶改性最佳工艺条件为啤酒糟蛋白添加量30%、加酶量15?U/g、反应pH?7、水浴温度48?℃、水浴时间132?min。在此条件下,混合蛋白的凝胶强度为218.55?g。本研究为啤酒糟蛋白的精深加工提供实验参考。

关键词: 谷氨酰胺转氨酶, 啤酒糟蛋白, 凝胶性

Abstract: In order to improve the gel properties and amino acid composition of brewer’s spent grains (BSG) protein, the modification of BSG protein and soybean protein mixtures with transglutaminase (TGase) was optimized using one-factor-at-a-time method and response surface methodology. The gel strength of modified proteins was investigated with respect to proportion of BSG protein, enzyme dosage, water bath temperature and heating time. The results showed that BSG protein with a protein content of 52.23% was obtained through wet milling, and that its amino acid composition was dominated by glutamate and proline. The optimal modification condition of BSG protein was determined as follows: 30% BSG protein, 15 U/g of TGase, pH 7, and water bath heating at 48 ℃ for 132 min. The gel strength of the modified proteins was 218.55 g. The approach presented in this study can provide an experimental basis for the deep processing of brewer’s spent grains protein.

Key words: transglutaminase, brewer’s spent grains protein, gelling property

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