食品科学 ›› 2009, Vol. 30 ›› Issue (20 ): 198-202.doi: 10.7506/spkx1002-6300-200920040

• 工艺技术 • 上一篇    下一篇

罗非鱼蛋白酶解液的多肽与钙复合物的制备及其抑菌分析

丁利君,危雪如   

  1. 广东工业大学轻工化工学院
  • 收稿日期:2009-07-02 出版日期:2009-10-15 发布日期:2010-12-29
  • 通讯作者: 丁利君, E-mail:ddddlj@gmail.com
  • 基金资助:

    广东省科技厅计划项目(2006B20401012)

Preparation and Antibacterial Activity of Chelate Complex of Ca2+ and Polypeptides from Tilapia Proteins

DING Li-jun,WEI Xue-ru   

  1. (Faculty of Light and Chemical Industry, Guangdong University of Technology, Guangzhou 510006, China)
  • Received:2009-07-02 Online:2009-10-15 Published:2010-12-29
  • Contact: DING Li-jun, E-mail:ddddlj@gmail.com

摘要:

采用木瓜蛋白酶和风味酶的复合酶解罗非鱼蛋白,制取富含多肽的酶解液;并将酶解液中的多肽与Ca2+反应制备多肽-钙螯合物,探讨反应液的pH值、反应温度、反应时间、多肽与CaCl2的质量比对螯合反应的影响,并对产物进行抑菌实验。结果表明:多肽液与Ca2+的最佳螯合工艺为反应pH7.13,反应温度29.5℃,反应时间24.05min,多肽与CaCl2的质量比2.68:1,在此最佳条件下钙的螯合率为87.5%;产物对多种微生物,特别是对细菌的生长有良好的抑制作用。

关键词: 罗非鱼, 钙离子, 螯合物, 抑菌

Abstract:

Hydrolysates rich in polypeptides was obtained from enzymatic hydrolysis of tilapia proteins using papain and subtilisin. A Ca2+ chelate was prepared using the hydrolysates and calcium. Effects of pH, temperature, time, and ratio of hydrolysates to CaCl2 on chelation reaction were explored. Apart from this, the Ca2+ chelate was evaluated for antibacterial activity. Results indicated that the optimal chelation reaction between hydrolysates and CaCl2 conducted for 24.05 min at 29.5 ℃ and pH 7.13 with a polypeptide/calcium mass ratio of 2.68:1 yielded 87.5% of Ca2 + chelating rate. The chelated products exhibited an effective inhibition against a majority of microorganisms, especially against Saccharomyces cerevisiae, Aspergillus niger and bacteria such as Esoherichia coli, Staphylococcus aureus, Bacillus subtilis, Psendomonas fluorescens, and Candida albicans.  

Key words: tilapia, Ca2+, chelate, antibacterial activity

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