华南理工大学学报(自然科学版) ›› 2015, Vol. 43 ›› Issue (2): 1-7.doi: 10.3969/j.issn.1000-565X.2015.02.001

• 食品科学与技术 •    下一篇

乳清蛋白肽的酶法制备、分离纯化及活性评价

任娇艳 赖婷 江燕清 卢韵君 刘鹏 廖文镇   

  1. 华南理工大学 轻工与食品学院,广东 广州 510640
  • 收稿日期:2014-08-05 修回日期:2014-11-14 出版日期:2015-02-25 发布日期:2014-12-31
  • 通信作者: 任娇艳(1980-),女,博士,教授,主要从事食品生物化学、食品营养与健康等研究. E-mail: jyren@scut.edu.cn
  • 作者简介:任娇艳(1980-),女,博士,教授,主要从事食品生物化学、食品营养与健康等研究.
  • 基金资助:

    广东省自然科学杰出青年基金资助项目 (S2013050013954);教育部新世纪优秀人才支持计划项目(NCET-13-0213);广东省科技计划项目(2013B010404001);农业部重点实验室开放基金资助项目(NYJG201402)

Enzymatic Preparation,Separation,Purification and Antioxidant Activity Evaluation of Whey Protein Peptides

Ren Jiao-yan Lai Ting Jiang Yan-qing Lu Yun-jun Liu Peng Liao Wen-zhen   

  1. School of Light Industry and Food Sciences,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2014-08-05 Revised:2014-11-14 Online:2015-02-25 Published:2014-12-31
  • Contact: 任娇艳(1980-),女,博士,教授,主要从事食品生物化学、食品营养与健康等研究. E-mail: jyren@scut.edu.cn
  • About author:任娇艳(1980-),女,博士,教授,主要从事食品生物化学、食品营养与健康等研究.
  • Supported by:

    Supported by the Natural Science Foundation of Guangdong Province for Distinguished Young Scholars(S2013050013954),Program for New Century Excellent Talents in University of Ministry of Education of China(NCET-13-0213)and the Science and Technology Project Item of Guangdong Province(2013B010404001)

摘要: 以抗氧化活性及蛋白质回收率为筛选指标对乳清蛋白肽酶解工艺进行优化,用层析柱对酶解液进行逐级分离纯化,并对其分子质量进行检测. 研究结果表明:利用胰酶、复合风味蛋白酶、木瓜蛋白酶和碱性蛋白酶酶解制备乳清蛋白肽,最佳用酶为碱性蛋白酶、最适底物含量为4. 0%、最适加酶量为8000U/g、最佳酶解时间为4h;酶解液经 DEAE-52 纤维素层析后得到的 A 组分抗氧化活性最好,其还原力为 0. 3200 ±0. 0041,DPPH 自由基清除率为6. 58% ±0. 36%;A 组分再经 Sephadex G-15 葡聚糖凝胶层析柱分离纯化后得到组分 G,其 DPPH 自由基清除率为 6. 73% ±0. 083%;组分 G 的主要成分为分子质量378u 的肽段,其一级氨基酸组成为赖氨酸(Lys)、亮氨酸(Leu)及丝氨酸(Ser).

关键词: 乳清蛋白, 酶解, 分离, 纯化, 活性评价, DEAE-52 离子交换柱层析, Sephadex G-15葡聚糖凝胶柱层析

Abstract: Whey protein peptides were prepared via enzymolysis,and the corresponding conditions were optimized by taking antioxidant activity and protein recovery as two indicators. Then,the enzymatic hydrolysate was separated and purified by means of column chromatography,and the molecular mass of the product was measured. The results indicate that (1) alkaline protease is more suitable for the enzymolysis than trypsogen,flavorzyme and papain,with an optimal substrate dosage of 4. 0%,an optimal enzyme dosage of 8000U/g and an optimal enzymolysis time of 4h; (2) fraction A obtained by DEAE-52 cellulose column chromatography exhibits the highest antioxidant activi-ty,with a reducing power value of 0. 3200 ±0. 0041 and a DPPH radical scavenging activity of 6. 58% ±0. 36%;(3) further separation of fraction A via Sephadex G-15 gel column chromatography helps to obtain fraction G with a DPPH radical scavenging activity of 6. 73% ±0. 083%; and (4) the main component identified from fraction G,which contains three amino acids (namely Lys,Leu and Ser),is of a molecular mass of 378u.

Key words: whey protein, enzymolysis, separation, purification, activity evaluation, DEAE-52 ion exchange col-umn chromatography, Sephadex G-15 gel filtration chromatography

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