›› 2010, Vol. 37 ›› Issue (1): 28-31.

• 生理生化 • 上一篇    下一篇

大麦芽阿魏酸酯酶的分离纯化及其部分酶学性质的测定

刘莎莎1, 李华2, 石庆华1, 王希东1, 程发祥3   

  1. (1.新疆农业大学农学院, 乌鲁木齐 830052; 2.中国农业大学(烟台), 烟台 2646701;3.新疆农业大学动物科学学院动物营养实验室, 乌鲁木齐 830052)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-01-20 发布日期:2010-01-20
  • 通讯作者: 李华

Purification and Partial Characterisation of Feruloyl Esterase from Barley Malt

LIU Sha-sha1, LI Hua2, SHI Qing-hua1, WANG Xi-dong1, CHENG Fa-xiang3   

  1. (1.College of Agronomy Xinjiang Agricultural University, Urumqi 830052,China; 2.China Agricultural University(Yantai),Yantai 264670, China; 3.Laboratory of Animal Nutrition, College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-01-20 Published:2010-01-20
  • Contact: LI Hua

摘要: 本试验采用硫酸铵分级沉淀、透析、DEAE-52离子交换层析对大麦芽中的阿魏酸酯酶(FAE)进行了分离纯化,并测定了其部分酶学性质。结果显示,分离纯化后获得了阿魏酸酯酶纯品,纯化倍数达34倍;经SDS-PAGE电泳显示为单一条带,并测定其相对分子质量约为29.3 ku;最适反应温度为50 ℃;最适pH为5.5,但阿魏酸酯酶在60 ℃以下,pH 4.5~7.5之间有较好的稳定性;Zn2+、Cu2+、Fe3+对酶活有很强的抑制作用,Na+和EDTA对酶有一定的激活作用。

关键词: 大麦芽; 阿魏酸酯酶; 分离纯化; 酶学性质

Abstract: The activity of feruloyl esterase has been enhanced in barley grain and barley malt.Feruloyl esterase solution was extracted from barley malt has been purified by ammonium sulfate precipitation,DEAE-cellulose column chromatography.The feruloyl esterase was purified 34-fold as shown in SDS-PAGE gel electrophoresis and the molecular weight estimated to be about 29.3 kD.Characterization of the enzyme exhibited that the optimum pH and the optimum temperature were 5.5 and 50 ℃,respectively,and it lost little activity after one hour below 60 ℃ from pH 4.5 to 7.5.It was inhibited by Zn2+,Fe3+,Cu2+,and strongly activated by EDTA and Na+. 

Key words: barley malt; feruloyl esterase; isolation and purification; enzyme characterisation

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