堇叶碎米荠低聚肽制备工艺优化及结构特征、氧化活性研究
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(1. 恩施土家族苗族自治州农业科学院,湖北 恩施 445000;2. 湖北省富硒产业技术研究院,湖北 恩施 445000)

作者简介:

问小龙,男,恩施土家族苗族自治州农业科学院助理研究员,硕士。

通讯作者:

向极钎(1967—),男,恩施土家族苗族自治州农业科学院研究员。E-mail: hmxjq@163.com

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基金项目:

恩施州农科院青年创新基金项目(编号:2021-003);武汉市对口帮扶恩施州项目(编号:21001)


Preparation, structural characteristics and antioxidant activity of Cardamine violifolia oligopeptides
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(1. Enshi Tujia & Miao Autonomous Prefecture Academy of Agricultural Sciences, Enshi, Hubei 445000, China; 2. Hubei Selenium Industry Technology Research Institute, Enshi, Hubei 445000, China)

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    摘要:

    目的:制备堇叶碎米荠低聚肽,并拓展其应用范围。方法:以堇叶碎米荠为原料,使用碱性蛋白酶酶解,采用超滤膜进行分离浓缩,冷冻干燥后获取堇叶碎米荠低聚肽粉末,并对该低聚肽的结构和抗氧化活性进行分析。结果:堇叶碎米荠蛋白水解的最佳工艺条件为酶解温度50 ℃、酶解pH 10、加酶量4%、底物质量分数2%,此条件下水解度为17.9%;堇叶碎米荠低聚肽的蛋白质和多肽含量分别为49.01%和42.87%;该低聚肽在200~220 nm有较强的吸收带,具有酰胺键的特征吸收峰,二级结构以β-转角为主,相对分子质量<1 000的约占90%;当堇叶碎米荠低聚肽质量浓度为20 mg/mL时,其羟自由基、ABTS自由基、DPPH自由基清除率分别为84.54%,98.22%,60.33%。结论:试验优化的堇叶碎米荠低聚肽制备工艺合理可行,堇叶碎米荠低聚肽具有抗氧化活性。

    Abstract:

    Objective: This study aimed to prepare oligopeptidess of Camelina violifolia and expand its application range. Methods: C. violifolia protein was hydrolyzed by alkaline protease, and then used ultrafiltration membrane for isolating and concentrating, and obtained oligopeptides by freeze-drying. The structure and antioxidant activity of C. violifolia oligopeptides were analyzed. Results: The optimum conditions for the hydrolysis of C.violifolia protein were as follows: hydrolysis temperature 50 ℃, pH 10, enzyme dosage 4%, substrate concentration 2%, and hydrolysis degree 17.9%. The C. violifolia oligopeptides contents of protein and polypeptide were 49.01% and 42.87%, respectively. The oligopeptides had a strong absorption band at 200~220 nm, amide bond-specific absorption peaks, β-angle was the main secondary structure, and a 90% relative molecular weight of less than 1 000 Da. When the oligopeptides concentration was 20 mg/mL, the scavenging rates of hydroxyl radical, ABTS radical and DPPH radical were 84.54%, 98.22% and 60.33% respectively. Conclusion: The preparation process of the oligopeptides of C. violifolia is reasonable and feasible. The oligopeptides have good antioxidant capacity.

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问小龙,向极钎,张 亮,等.堇叶碎米荠低聚肽制备工艺优化及结构特征、氧化活性研究[J].食品与机械,2024,40(1):189-196.
WEN Xiaolong, XIANG Jiqian, ZHANG Liang, et al. Preparation, structural characteristics and antioxidant activity of Cardamine violifolia oligopeptides[J]. Food & Machinery,2024,40(1):189-196.

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  • 收稿日期:2023-04-10
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  • 在线发布日期: 2024-01-30
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