食品科学 ›› 2007, Vol. 28 ›› Issue (6): 188-192.

• 生物工程 • 上一篇    下一篇

Aspergillus ficuum菊粉酶的分离纯化与鉴定

 王静, 金征宇, 江波, 徐学明   

  1. 江南大学食品学院; 江南大学食品学院 江苏无锡214036; 江苏无锡214036;
  • 出版日期:2007-06-15 发布日期:2011-12-31

Purification and Identification of Aspergillus ficuum Inulinases

 WANG  Jing, JIN  Zheng-Yu, JIANG  Bo, XU  Xue-Ming   

  1. School of Food Science and Technology, Southern Yangtze University, Wuxi 214036, China
  • Online:2007-06-15 Published:2011-12-31

摘要: Aspergillus ficuum菊粉酶系经硫酸铵分级沉淀、透析脱盐、DEAE-Cellulose离子交换色谱、Sepharose CL-6B凝胶过滤色谱和制备电泳技术分离纯化,获得五个电泳纯酶:三个外切菊粉酶组分Exo-I、Exo-II、Exo-III和两个内切菊粉酶组分Endo-I、Endo-II。SDS-PAGE分析测得五种酶的分子量分别为:Exo-I:69961Da,Exo-II:39973Da,Exo-III:45561Da,Endo-I:33574Da,Endo-II:30769Da。

关键词: 菊粉酶, 分离纯化, 鉴定, Aspergillus ficuum

Abstract: Aspergillus ficuum inulinases were purified in a sequence of operations including ammonium sulfate fractionation, ion exchange chromatography on DEAE-Cellulose, column chromatography with Sepharose CL-6B and preparative electrophoresis. Five purified enzymes were thus obtained, two having an endo-type activity and the other being exo-actings. The five enzymes were identified as Exo-I, Exo-II, Exo-III, Endo-I and Endo-II, with MW(molecular weight) of 69961Da, 39973Da, 45561Da, 33574Da, 30769Da, respectively, determined by SDS-PAGE.

Key words: inulinase, purification, identification, Aspergillus ficuum