郭露,李海蓝,鉏晓艳,熊光权,刘文博,赵青,周志

• 1:湖北民族大学生物与食品工程学院
• 2:湖北省农业科学院农产品加工与核农技术研究所
• 3:湖北省农业科技创新中心农产品加工研究分中心

摘要(Abstract)：

【目的】确定史氏鲟（Acipenser schrenckii）鱼皮肽最佳酶解条件，了解其血管紧张素转换酶（ACE）抑制活性，探究史氏鲟鱼皮在ACE抑制活性肽段的开发应用的可行性。【方法】参照国标方法测定鲟鱼皮基本组成成分；以水解度和ACE抑制率为指标，采用单因素实验对最适水解酶、加酶量、料液比、温度以及时间确定鲟鱼鱼皮肽最佳酶解条件；使用不同截留相对分子质量的超滤膜设备分离纯化鲟鱼皮肽，并比较其ACE抑制率；随后对最优肽组分进行紫外光谱、分子质量范围、肽序列测定和生物学活性预测。【结果与结论】鲟鱼皮干基主要由蛋白质和脂肪组成。确定鲟鱼皮肽最佳酶解条件为使用碱性蛋白酶、酶添加量6 000 U/g，料液质量体积比1 g∶5 mL，温度60℃，酶解时间7 h。分离纯化后得到3种相对分子质量不同的鲟鱼皮肽，分别为ASPs-1、ASPs-2和ASPs-3，其中最优肽组分ASPs-1的分子质量范围为172.13～2135.02u，共鉴定获得28条综合得分大于100的肽段，分子质量集中在807.45～1 952.96 u；其中GPGGPSGERGPPGPM、GPSGPGGPPGPR、SGPPGFPGSPGPKGE、GPPGKDGQPGHPGPIGPA、GPAGPRGPAGPA五条肽段预测具有ACE抑制功能，水溶性好，无生物学毒性，说明ASPs-1作为ACE抑制剂，有运用于生物体的潜力。

关键词(KeyWords)： 鲟鱼皮肽;酶法提取;分离纯化;鉴定;ACE抑制;生物学活性

Abstract:

Keywords:

基金项目(Foundation): 湖北省重点研发计划项目(2023DJC151,2022BBA0011)

作者(Author): 郭露,李海蓝,鉏晓艳,熊光权,刘文博,赵青,周志

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