食品科学 ›› 2021, Vol. 42 ›› Issue (17): 19-26.doi: 10.7506/spkx1002-6630-20200916-218

• 基础研究 • 上一篇    下一篇

黑豆糖蛋白的结构分析及抗氧化和免疫活性

胡懿化,王星滟,张武霞,岳爱琴,杜维俊,赵晋忠,李鹏   

  1. (1. 山西农业大学基础部,山西 太谷 030801;2. 山西农业大学农学院,山西 太谷 030801)
  • 发布日期:2021-09-29
  • 基金资助:
    国家自然科学基金青年科学基金项目(31800678;81703945);山西省高校创新基金项目(2019L0365;2019L0360); 山西省研究生教育创新项目(2020SY198);山西省重点研发计划项目(201903D211006); 山西功能农业共性关键技术研究与示范项目(201703D211001)

Structural Characterization and Antioxidant and Immunoregulatory Activity of Glycoproteins from Black Soybeans

HU Yihua, WANG Xingyan, ZHANG Wuxia, YUE Aiqin, DU Weijun, ZHAO Jinzhong, LI Peng   

  1. (1. Basic Department, Shanxi Agricultural University, Taigu 030801, China; 2. College of Agriculture, Shanxi Agricultural University, Taigu 030801, China)
  • Published:2021-09-29

摘要: 本实验从黑豆中分离得到两种糖蛋白,并对其结构组成、抗氧化活性和免疫活性进行研究,为糖蛋白的高效开发利用提供理论依据。采用碱提醇沉法提取黑豆糖蛋白粗品,命名为HDJ,通过DEAE-52纤维素柱层析和Sephadex G-100柱层析分离纯化获得两个均一组分,分别命名为HDJS2和HDJS5-2。利用物理化学方法和光谱法对其化学组成及结构进行分析,通过测定总还原力、1,1-二苯基-2-三硝基苯肼(2,2-diphenyl-1-picrylhydrazyl,DPPH)清除率及总抗氧化能力研究两种糖蛋白的抗氧化活性,采用噻唑蓝比色法评价两种糖蛋白的免疫活性。结果表明:HDJS2(3.20×104 Da)和HDJS5-2(3.89×104 Da)主要是由中性糖和蛋白质组成的糖蛋白,其糖肽键类型均为O-型糖肽键。HDJS2主要由甘露糖、葡萄糖、半乳糖、阿拉伯糖、岩藻糖和96.1%氨基酸组成;HDJS5-2主要由甘露糖、葡萄糖、半乳糖、阿拉伯糖和71.3%氨基酸组成。抗氧化分析结果表明,HDJS2和HDJS5-2的还原能力、DPPH清除能力和抗氧化能力呈剂量依赖性关系。此外,HDJS2和HDJS5-2均能够促进脾淋巴细胞增殖。结论:HDJS2和HDJS5-2具有潜在的抗氧化作用和免疫调节作用。

关键词: 黑豆;糖蛋白;抗氧化活性;脾细胞增殖

Abstract: In this paper, crude glycoprotein from black soybeans (designated HDJ) prepared by alkaline extraction and then alcohol precipitation was fractionated by column chromatography on DEAE-52 cellulose and Sephadex G-100 into two fractions, designated HDJS2 and HDJS5-2. Their chemical compositions were determined and their structures were characterized by spectroscopic methods. Their antioxidant activities were analyzed by reducing power, 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging rate and total antioxidant capacity assays. Immunoregulatory activities were determined by the methyl thiazolyl tetrazolium (MTT) colorimetric method. The results showed that HDJS2 (3.20 × 104 Da) and HDJS5-2 (3.89 × 104 Da) were mainly composed of neutral carbohydrate and protein. The glycopeptide bond types were O-type. HDJS2 was mainly composed of mannose, glucose, galactose, arabinose and fucose together with 96.1% amino acids. HDJS5-2 was mainly composed of mannose, glucose, galactose and arabinose as well as 71.3% amino acids. HDJS2 and HDJS5-2 had antioxidant activity in a dose-dependent. In addition, both glycoproteins could promote splenocyte proliferation, suggesting that they had immunoregulatory effects.

Key words: black soybeans; glycoprotein; antioxidant activity; splenic cell proliferation

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