食品科学 ›› 2020, Vol. 41 ›› Issue (12): 129-135.doi: 10.7506/spkx1002-6630-20190507-050

• 生物工程 • 上一篇    下一篇

鸡蛋蛋白ACE抑制肽的筛选、鉴定及其作用机制

于志鹏,樊玥,赵文竹,张馨月,刘静波   

  1. (1.渤海大学食品科学与工程学院,生鲜农产品贮藏加工及安全控制技术国家地方联合工程研究中心,辽宁 锦州 121013 2.吉林大学营养与功能食品研究室,吉林 长春 130062)
  • 出版日期:2020-06-25 发布日期:2020-06-22
  • 基金资助:
    “十三五”国家重点研发计划重点专项(2018YFD0400301)

Identification and Mechanism of Action of Angiotensin-? Converting Enzyme Inhibitory Peptides from Hen Egg Proteins

YU Zhipeng, FAN Yue, ZHAO Wenzhu, ZHANG Xinyue, LIU Jingbo   

  1. (1. National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, College of Food Science and Engineering, Bohai University, Jinzhou 121013, China; 2. Lab of Nutrition and Functional Food, Jilin University, Changchun 130062, China)
  • Online:2020-06-25 Published:2020-06-22

摘要: 借助在线数据库,以鸡蛋蛋白为原料,进行虚拟酶解,通过对活性肽分子质量、生物活性、水溶性及其吸收、分配、代谢、排泄和毒性等性质进行预测,并结合分子对接筛选出与血管紧张素转化酶(angiotensin-? converting enzyme,ACE)稳定结合的3 种ACE抑制肽。FOMC法固相合成三肽FQK、WGK和ADW,并经反相高效液相色谱法测定其体外ACE抑制活性,半抑制浓度分别为(250±0.25)、(222.74±1.02)、(85.38±0.54)μmol/L。分子对接结果表明,FQK、WGK和ADW对ACE的抑制主要归因于能够与ACE的活性口袋S1和S2形成氢键相互作用。本研究为食源性ACE抑制肽的鉴定提供一种高通量筛选方法。

关键词: 鸡蛋蛋白质, 虚拟筛选, ACE抑制肽, 活性口袋, 分子对接

Abstract: In this study, in silico methods were used to discover novel angiotensin-? converting enzyme (ACE) inhibitory peptides from hen eggs for regulation of blood pressure. Hen egg proteins were in silico hydrolyzed using ExPASy PeptideCutter program. Potential activity, solubility, and absorption, distribution, metabolism, excretion, and toxicity (ADMET) properties of the generated peptides were predicted using program online. Three novel ACE inhibitory peptides, FQK, WGK and ADW, were identified from hen egg protein with IC50 values of (250 ± 0.25), (222.74 ± 1.02) and (85.38 ± 0.54) μmol/L, respectively. The molecular docking studies revealed that the ACE inhibitory activity of FQK, WGK and ADW was mainly attributed to their ability to form very strong hydrogen bonds with the S1 an S2 pockets. This study provides a high-throughput screening method for the identification of food-derived ACE inhibitory peptides.

Key words: hen egg proteins, virtual screening, angiotensin-? converting enzyme inhibitory peptides, pocket site, molecular docking

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