食品科学 ›› 2018, Vol. 39 ›› Issue (6): 183-188.doi: 10.7506/spkx1002-6630-201806029

• 生物工程 • 上一篇    下一篇

响应面试验优化酶解法制备海洋微藻微拟球藻抗氧化肽工艺

吕小京1,操德群1,2,徐年军1,2,*   

  1. (1.宁波大学海洋学院,浙江省海洋生物工程重点实验室,浙江?宁波 315211;2.宁波大学 应用海洋生物技术教育部重点实验室,浙江?宁波 315211)
  • 出版日期:2018-03-25 发布日期:2018-03-14
  • 基金资助:
    宁波市科技局科技富民计划项目(2016C10034);浙江省教育厅科研项目(Y201432453)

Optimization of Enzymatic Preparation of Antioxidant Peptides from Protein Hydrolysate of the Marine Microalgae Nannochloropsis by Response Surface Methodology

Lü Xiaojing1, CAO Dequn1,2, XU Nianjun1,2,*   

  1. (1. Key Laboratory of Marine Biotechnology of Zhejiang Province, School of Marine Sciences, Ningbo University, Ningbo 315211, China; 2. Key Laboratory of Applied Marine Biotechnology of Ministry of Education, Ningbo University, Ningbo 315211, China)
  • Online:2018-03-25 Published:2018-03-14

摘要: 以海洋微藻饵料微拟球藻蛋白为原料,采用胃蛋白酶酶解制备微拟球藻抗氧化肽。以酶解产物的水解度和1,1-二苯基-2-三硝基苯肼自由基清除活性为评价指标,研究酶底比(质量百分比)、底物质量浓度、酶解温度和pH值对酶解产物的影响。在单因素试验的基础上,利用响应面法优化制备高抗氧化活性抗氧化肽的工艺条件,确定最佳酶解工艺条件为:底物质量浓度5.0?mg/mL、酶解温度32?℃、pH?1.36、酶底比6%。在最佳酶解条件下实际测得微拟球藻抗氧化肽的DPPH自由基清除率为51.85%。

关键词: 微拟球藻, 抗氧化肽, DPPH自由基清除活性, 水解度, 响应面法

Abstract: Protein from the marine microalga Nannochloropsis was extracted and hydrolyzed with pepsin to prepare antioxidant peptides. The effects of enzyme-to-substrate ratio, substrate concentration, hydrolysis temperature and pH on the degree of hydrolysis (DH) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity of hydrolysates were investigated and the process conditions were optimized using one-factor-at-a-time (OFAT) method and response surface methodology (RSM). The optimal hydrolysis conditions were determined as follows: substrate concentration, 5.0 mg/mL; temperature, 32 ℃; pH, 1.36; and enzyme-to-substrate ratio, 6%. The hydrolysate prepared under these conditions could scavenge 51.85% of DPPH free radical.

Key words: Nannochloropsis sp., antioxidant peptides, DPPH free radical scavenging activity, degree of hydrolysis, response surface methodology

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