食品科学 ›› 2011, Vol. 32 ›› Issue (13): 239-243.doi: 10.7506/spkx1002-6630-201113052

• 生物工程 • 上一篇    下一篇

胞外单宁酶纯化及酶学性质的研究

王维维1,2,邱树毅1,2,*,谢晓莉1,2,吴鑫颖3,李广神2,3,何顺荣2,3   

  1. 1.贵州大学生命科学学院 2.贵州省发酵工程与生物制药重点实验室 3.贵州大学化学与化工学院
  • 出版日期:2011-07-15 发布日期:2011-07-02
  • 基金资助:
    贵州省自然科学基金项目(黔科合J 字[2008]2091 号;黔科合J 字[2010]2279 号); 贵州省科技攻关项目(黔科合GY字(2009)3022 号)

Purification and Enzymatic Properties of Extracellular Tannase from Aspergillus niger

WANG Wei-wei1,2,QIU Shu-yi1,2,*,XIE Xiao-li1,2,WU Xin-ying3,LI Guang-shen2,3,HE Shun-rong2,3   

  1. 1. College of Life Science, Guizhou University, Guiyang 550025, China; 2. Guizhou Province Key Laboratory of Fermentation and Biopharmacy, Guiyang 550003, China; 3. School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550003, China
  • Online:2011-07-15 Published:2011-07-02

摘要: 采用黑曲霉B0201固态生料发酵生产胞外单宁酶,经过硫酸铵分级沉淀、DEAE-纤维素层析、葡聚糖G-150凝胶柱层析纯化,得到电泳纯的单宁酶,纯化倍数达到18.44。对该酶的性质研究表明:单宁酶的相对分子质量大小约为58800,该酶的最适反应温度是40℃,最适反应pH值是5.0;以PG为底物,米氏常数Km为1.08mmol/L,Vmax为104.1μmol/(L ·min)。

关键词: 生料发酵, 纯化, 单宁酶

Abstract: Extraction with sodium citrate-citric acid buffer, (NH4)2SO4 fractional precipitation, DEAE-cellulose column separation and Sephadex G-150 column purification were sequentially carried out to obtain an electrophoretically pure extracellular tannase from solid state cultures of Aspergillus niger B0201, with a purification fold of 18.44. The enzyme had a molecular weight of roughly 58800 and the optimum reaction temperature and pH were 40 ℃ and 5.0, respectively. When the substrate was propyl gallate (PG), the Km was 1.08 mmol/L and the Vmax 104.1μmol/(L ·min).

Key words: tannase, fermentation without cooking, purification

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