高等学校化学学报

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姬松茸低聚肽的制备及性质

张艳荣1, 王大为1, 张雅媛1, 刘婷婷1, 李玉2   

    1. 吉林农业大学食品科学与工程学院,
    2. 农学院, 长春 130118
  • 收稿日期:2008-04-22 修回日期:1900-01-01 出版日期:2009-02-10 发布日期:2009-02-10
  • 通讯作者: 李玉

Preparation, Characterization and Properties of Agaricus blazei Murill Oligopeptide

ZHANG Yan-Rong1, WANG Da-Wei1, ZHANG Ya-Yuan1, LIU Ting-Ting1, LI Yu2*   

    1. College of Food Science and Engineering,
    2. College of Agronomy, Jilin Agricultural University, Changchun 130118, China
  • Received:2008-04-22 Revised:1900-01-01 Online:2009-02-10 Published:2009-02-10
  • Contact: LI Yu

摘要: 采用超临界CO2萃取对姬松茸进行脱脂处理后, 用微波提取姬松茸多糖, 以脱脂脱多糖的姬松茸为原料, 采用双酶法制取姬松茸低聚肽, 并对姬松茸低聚肽的抗氧化能力进行了研究. 结果表明, Alcalase 2.4L碱性蛋白酶的最佳酶解条件为: pH=8.5, 温度55 ℃, 酶解时间2 h, 底物浓度5%, 酶用量1.5%, 肽得率为74.7%. Flavourzyme风味蛋白酶最佳酶解的条件为: pH=7.0, 温度50 ℃, 时间1.5 h, 酶用量为4%, 最终肽得率为80.6%. 姬松茸低聚肽分子量集中在5600以下, 人体必需氨基酸含量为50.91%(质量分数). 姬松茸低聚肽对邻苯三酚自氧化具有明显的抑制作用, 抑制率为35.6%.

关键词: 姬松茸, 低聚肽, 蛋白酶解, 抗氧化

Abstract: Agaricus blazei Murrill fruit polysaccharides was extracted by microwave technology after supercritical CO2 fluid extracting. Agaricus blazei Murill oligopeptide were manufactured through proteolysis of two kind protease after degreasant and polysaccharide-free , and the antioxidation activity of oligopeptide was preliminary studied. The results show that the optimum hydrolyzing conditions of Alcalase 2.4L are pH=8.5, temperature 55 ℃, concentration of substrate is 5%, time is 2 h , the amount of enzyme is 1.5%, the yield of peptide is 74.7%.The optimum hydrolyzing conditions of Flavourzyme are pH=7.0, temperatue 50 ℃, time is 1.5 h, enzyme concentration 4%, the final peptide yield reached 80.6%. Agaricus blazei Murrill oligopeptide is rich in Pro, Lys, Phe, the content of essential amino acid(EAA) is 50.91%, the molecular weight below 5600. The anti oxidation activity of Agaricus blazei Murrill oligopeptide has obviously activity of antixidation, the suppression rate is 35.6%.

Key words: Agaricus blazei Murill, Oligopeptide, Proteolysis, Antioxidation

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