食品科学 ›› 2020, Vol. 41 ›› Issue (14): 58-65.doi: 10.7506/spkx1002-6630-20190627-364

• 食品化学 • 上一篇    下一篇

大豆亲脂蛋白组分分析及体外抗氧化特性

曾剑华,刘琳琳,杨 杨,张 娜,朱秀清,石彦国,郑环宇,王新越   

  1. (1.哈尔滨商业大学食品工程学院,黑龙江省普通高校食品科学与工程重点实验室,黑龙江省谷物食品与综合加工重点实验室,黑龙江 哈尔滨 150076;2.黑龙江省绿色食品科学研究院,黑龙江 哈尔滨 150028)
  • 发布日期:2020-07-29
  • 基金资助:
    黑龙江省“百千万”工程科技重大专项(2019ZX08B01);黑龙江省自然科学基金重点项目(ZD2019C005); “十三五”国家重点研发计划重点专项(2016YFD0400402);国家自然科学基金面上项目(31871747)

Composition and in Vitro Antioxidant Properties of Soy Lipophilic Protein

ZENG Jianhua, LIU Linlin, YANG Yang, ZHANG Na, ZHU Xiuqing, SHI Yanguo, ZHENG Huanyu, WANG Xinyue   

  1. (1. Key Laboratory for Food Science and Engineering, Key Laboratory for Grain Food and Comprehensive Processing, College of Food Engineering, Harbin University of Commerce, Harbin 150076, China; 2. Heilongjiang Green Food Science Research Institute, Harbin 150028, China)
  • Published:2020-07-29

摘要: 探究大豆亲脂蛋白(soy lipophilic protein,SLP)的体外抗氧化特性,通过氨基酸自动分析仪和气相色谱研究SLP的氨基酸和脂肪酸组成。结果表明:与大豆分离蛋白、11S和7S球蛋白相比,SLP富含支链氨基酸(16.44 g/100 g);通过气相色谱分离鉴定出SLP脂质含有27 种脂肪酸,主要由棕榈酸、十七碳酸、硬脂酸、油酸、亚油酸、亚麻酸和花生酸等脂肪酸组成,其中不饱和脂肪酸含量为66.55%;体外抗氧化实验结果表明,因SLP中的半胱氨酸、酪氨酸和二硫键含量较高,且富含磷脂成分而具有较好的双亲特性,同时含有较大的疏水核心,SLP表现出良好的1,1-二苯-2-苦基肼自由基、羟自由基、2,2’-联氨-双-(3-乙基苯并噻唑啉-6-磺酸)阳离子自由基清除效果和铁还原能力。本实验为SLP作为功能性蛋白在抗氧化和增肌等应用领域开发利用提供理论支撑。

关键词: 大豆亲脂蛋白;氨基酸组成;脂肪酸组成;抗氧化性

Abstract: The purpose of this study was to investigate the antioxidant properties of soy lipophilic protein (SLP) and to analyze its amino acid and fatty acid profiles by amino acid automatic analyzer and gas chromatography (GC). The results showed that compared with soy protein isolate (SPI), 11S and 7S globulin, SLP was richer in branched-chained amino acids (16.44 g/100 g). A total of 27 fat acids were identified, mainly including palmitic acid, heptadecanoic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, and arachidic acid, with unsaturated fatty acids accounting for 66.55% of the total fatty acids. The in vitro antioxidant assay results showed that SLP had strong scavenging effect on 1,1-diphenyl-2-picrylhydrazyl (DPPH), hydroxyl, 2,2’-azinobis-(3-ethylbenzothiazoline-6-sulphonate (ABTS) cation radicals, and ferric reducing-antioxidant power (FRAP), owing to the high content of Cys, Tyr and disulfide bonds, abundant phospholipids with good amphipathic property and a large hydrophobic core. The results provide theoretical support for the development and utilization of SLP as a functional protein in the fields of antioxidant and muscle building.

Key words: soy lipophilic protein; amino acid profile; fatty acid composition; antioxidant properties

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