食品科学 ›› 2009, Vol. 30 ›› Issue (18): 25-28.doi: 10.7506/spkx1002-6300-200918001

• 工艺技术 •    下一篇

鱼降压肽的大孔吸附树脂分离及其活性稳定性

陈季旺1,孙勤 1,夏文水1,2   

  1. 1.武汉工业学院食品科学与工程学院,湖北武汉 430023;2.江南大学食品学院,江苏无锡 214122
  • 收稿日期:2009-03-02 修回日期:2009-06-07 出版日期:2009-09-15 发布日期:2010-12-29
  • 通讯作者: 陈季旺 E-mail:jiwangchen@yahoo.com.cn
  • 基金资助:

    国家“863”计划重大项目(2006AA09Z444;2007AA091802);省部产学研结合项目(2007A090302059)

Macroporous Adsorption Resin Isolation and Stability of Angiotensin-converting Enzyme (ACE) Inhibitory Activity of Antihypertensive Peptides Derived from Grass Carp Protein

CHEN Ji-wang1,SUN Qing1,XIA Wen-shui1,2   

  1. 1. School of Food Science and Technology, Wuhan Polytechnic University, Wuhan 430023, China ;
    2. School of Food Science and Technology, Jiangnan Unviersity, Wuxi 214122, China
  • Received:2009-03-02 Revised:2009-06-07 Online:2009-09-15 Published:2010-12-29
  • Contact: CHEN Ji-wang E-mail:jiwangchen@yahoo.com.cn

摘要:

采用大孔吸附树脂对碱性蛋白酶水解、水解度为34.52% 的鱼降压肽进行分离。结果表明,DA201-C 型大孔吸附树脂对鱼降压肽吸附性最好,乙醇体积分数为75% 时洗脱下来的组分具有最高的ACE 抑制活性,其IC50为1.52mg/ml。鱼降压肽中灰分由分离前的9.47% 减少到分离后的2.34%,肽和蛋白质含量分别由分离前的72.81%和81.26% 增加到分离后的80.24% 和92.42%。活性稳定性分析显示,胃蛋白酶和胰酶、中性和低酸性pH 值、55℃以下温度以及1000mmol/L 以内的NaCl 浓度对鱼降压肽的ACE 抑制活性影响较小。

关键词: 草鱼, 降压肽, 大孔吸附树脂, 血管紧张素转化酶活性

Abstract:

Various macroporous adsorption resins were used for the isolation of antihypertensive peptides from grass carp protein hydrolysate with the hydrolysis degree of 34.52% and the stability of angiotensin-converting enzyme (ACE) inhibitory activity of the peptides was analyzed. Among 8 types of macroporous adsorption resin tested, DA201-C had the best adsorption capability. The peptide fraction eluted by 75% ethanol displayed the highest ACE inhibitory activity with the IC50 of 1.52 mg/ml. After isolation, the ash content was decreased from 9.47% to 2.34%, while the contents of peptide and protein were increased from 72.81% to 81.26% and 80.24% to 92.42%, respectively. Pepsin, pancreatin, neutral and low acidic pH, heating at temperatures below 55 ℃ and concentrations of NaCl solution below 1000 mmol/L all had slight effects on the ACE inhibitory activity of the peptides.

Key words: grass carp, antihypertensive peptides, macroporous adsorption resin, angiotensin-converting enzyme (ACE) inhibitory activity

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