食品科学 ›› 2018, Vol. 39 ›› Issue (2): 119-123.doi: 10.7506/spkx1002-6630-201802019

• 生物工程 • 上一篇    下一篇

酪氨酸酶特异性卵黄抗体Fab’片段的制备及其对酶活力的抑制性能

钟欣欣,曹立民,林洪,史佩玉,隋建新*   

  1. (中国海洋大学食品科学与工程学院,山东?青岛 266003)
  • 出版日期:2018-01-25 发布日期:2018-01-05
  • 作者简介:钟欣欣,曹立民,林洪,史佩玉,隋建新
  • 基金资助:
    中央高校基本科研业务费专项(201413061);山东省农业应用创新专项

Production and Inhibitory Effect of Specific Egg Yolk Antibody Fab’ Fragment against Tyrosinase

ZHONG Xinxin, CAO Limin, LIN Hong, SHI Peiyu, SUI Jianxin*   

  1. (College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China)
  • Online:2018-01-25 Published:2018-01-05

摘要: 针对导致黑色素沉淀的酪氨酸酶,制备了特异性卵黄抗体Fab’片段,研究其对酶活力的抑制效果并从动力学角度进行分析。结果表明,胃蛋白酶法制备Fab’片段的最适条件为:pH?4.0、反应比(卵黄抗体-胃蛋白酶)1∶150(mg/U)、反应时间8?h。经免疫亲和柱纯化后可得理化性质稳定、纯度大于95%的Fab’片段;该片段通过非竞争性结合抑制酪氨酸酶活力,IC50为11.16?μmol/L,结合常数为5.79×105,抑制效果相比完整的卵黄抗体分子大大提高。本研究可为卵黄抗体Fab’片段作为潜在的酶活力抑制剂在食品、化妆品和医药等行业中应用提供理论参考。

关键词: 酪氨酸酶, 卵黄抗体, 蛋白酶解, Fab’片段, 活性抑制

Abstract: The production of Fab’ fragment from specific egg yolk antibody against tyrosinase and its inhibitory activity on tyrosinase were investigated in this paper. The optimal conditions were obtained as follows: pH 4.0, ratio of egg yolk antibody to pepsin 1:150 (mg/U), and reaction time 8 h. Fab’ fragment purified by immunoaffinity column chromatography to a purity of over 95% exhibited good physicochemical stability. It was demonstrated as a non-competitive inhibitor with an IC50 value of 11.16 μmol/L and a binding constant of 5.79 × 105, whose inhibitory effect was much higher than that of IgY. The results of this study can provide a theoretical basis for the application of egg yolk antibody Fab’ fragments in food, cosmetics and pharmaceutical industries as a potential enzyme inhibitor.

Key words: tyrosinase, egg yolk antibody, enzymatic proteolysis, fragment antigen binding (Fab’ fragment), enzyme activity inhibition

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