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中国精品科技期刊2020
张钧橙,王崇崇,廖彦超,等. 小麦活性肽的酶法制备及其抗氧化特性分析[J]. 食品工业科技,2025,46(24):1−8. doi: 10.13386/j.issn1002-0306.2024120142.
引用本文: 张钧橙,王崇崇,廖彦超,等. 小麦活性肽的酶法制备及其抗氧化特性分析[J]. 食品工业科技,2025,46(24):1−8. doi: 10.13386/j.issn1002-0306.2024120142.
ZHANG Juncheng, WANG Chongchong, LIAO Yanchao, et al. Enzymatic Preparation of Wheat Bioactive Peptides and Their Antioxidant Properties[J]. Science and Technology of Food Industry, 2025, 46(24): 1−8. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2024120142.
Citation: ZHANG Juncheng, WANG Chongchong, LIAO Yanchao, et al. Enzymatic Preparation of Wheat Bioactive Peptides and Their Antioxidant Properties[J]. Science and Technology of Food Industry, 2025, 46(24): 1−8. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2024120142.

小麦活性肽的酶法制备及其抗氧化特性分析

Enzymatic Preparation of Wheat Bioactive Peptides and Their Antioxidant Properties

  • 摘要: 本研究旨在制备高抗氧化活性的小麦活性肽,通过筛选适宜的酶及优化酶解条件实现目标。采用中性蛋白酶、碱性蛋白酶和木瓜蛋白酶对谷朊粉进行酶解,并基于DPPH自由基清除率确定最佳水解酶。进一步利用响应面试验优化所选酶(中性蛋白酶)的最佳酶解条件(时间、温度、加酶量),以制备小麦活性肽。通过高效液相色谱测定分子量分布,OPA法和BCA法评估水解度与蛋白纯度,多种抗氧化能力测试(包括DPPH、ABTS+自由基清除率、羟自由基清除率、超氧阴离子自由基清除率及ORAC值)评估其抗氧化特性。结果显示,中性蛋白酶、碱性蛋白酶以及木瓜蛋白酶的酶解产物的DPPH自由基清除率分别为90.17%、71.88%和39.12%,其中中性蛋白酶表现最优。响应面试验优化结果表明,中性蛋白酶在酶解时间3.36 h、温度53 ℃、加酶量10187.5 U/g条件下,DPPH自由基清除率达到最高值92.22%。此时,样品水解度为11.53%,蛋白纯度达85%,超过62.12%的肽段分子量小于1000 Da,且具有更高的抗氧化活性。此外,该条件下制备的小麦活性肽在ABTS+自由基清除率(97.47%)、羟自由基清除率(55.21%)、超氧阴离子自由基清除率(89.65%)及ORAC值(2.65 mmol Trolox/g)方面表现出优异的抗氧化性能,特别是羟自由基和超氧阴离子自由基清除能力显著高于对照组(P<0.05)。然而,DPPH和ABTS+自由基清除率略低于对照组,但ORAC值与对照组无显著差异(P>0.05)。这表明优化后的酶解工艺能够有效提升小麦活性肽的抗氧化性能,为功能性食品的进一步开发提供了坚实基础。

     

    Abstract: This study aimed to develop wheat-active peptides with enhanced antioxidant properties by identifying suitable enzymes and optimizing the hydrolysis conditions. Gluten was hydrolyzed using neutral protease, alkaline protease, and papain, and the optimal enzyme was selected based on DPPH radical scavenging efficiency. Further optimization of enzymatic conditions (time, temperature, and enzyme dosage) for the neutral proteases was conducted using response surface methodology. The molecular weight distribution was analyzed using high-performance liquid chromatography (HPLC), while the degree of hydrolysis and protein purity were assessed using the OPA and BCA methods. The antioxidant capacity was evaluated using DPPH, ABTS+ radical scavenging, hydroxyl radical scavenging, superoxide anion radical scavenging, and ORAC assays. The results indicated that the DPPH radical scavenging rates of peptides produced by neutral protease, alkaline protease, and papain were 90.17%, 71.88%, and 39.12%, respectively, indicating that neutral protease exhibited superior performance. Optimal conditions—3.36 hours of hydrolysis time, 53 ℃ temperature, and 10187.5 U/g enzyme dosage—yielded a maximum DPPH radical scavenging rate of 92.22%. Under these conditions, the sample exhibited a degree of hydrolysis of 11.53% and a protein purity of 85%, with over 62.12% of the peptides having a molecular weight below 1000 Da, displaying higher antioxidant activity. Additionally, the prepared wheat active peptides demonstrated exceptional antioxidant capabilities in ABTS+ radical scavenging (97.47%), hydroxyl radical scavenging (55.21%), superoxide anion radical scavenging (89.65%), and ORAC value (2.65 mmol Trolox/g). Notably, the hydroxyl and superoxide anion radical scavenging activities were significantly higher than those of the control group (P<0.05). Although the DPPH and ABTS+ radical scavenging rates were slightly lower than those of the controls, the ORAC values were not significantly different (P>0.05). These findings indicate that the optimized enzymatic process effectively enhances the antioxidant properties of active wheat peptides, providing a robust foundation for further development of functional food applications.

     

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