食品科学 ›› 2006, Vol. 27 ›› Issue (5): 143-147.

• 工艺技术 • 上一篇    下一篇

酸性β-甘露聚糖酶固态发酵工艺与粗酶性质

 李剑芳, 张静娟, 邬敏辰, 夏文水   

  1.  教育部食品科学与安全重点实验室; 江南大学食品学院;江南大学医学系;
  • 出版日期:2006-05-15 发布日期:2011-09-16

Solid State Fermentation Process of Acidic β-Mannanase and Its Crude Properties

 LI  Jian-Fang, ZHANG  Jing-Juan, WU  Min-Chen, XIA  Wen-Shui   

  1. 1.Key Laboratory of Food Science and Safety, Ministry of Education, Wuxi 214036, China; 2.School of Food Science and Technology, Southern Yangtze University, Wuxi 214036, China; 3.Department of Medicine, Southern Yangtze University, Wuxi 214036, China
  • Online:2006-05-15 Published:2011-09-16

摘要: 用宇佐美曲霉菌株(AspergillususamiiYL-01-78)进行固态发酵生产酸性β-甘露聚糖酶,其曲盘发酵的最优工艺为:培养基最初料水比为1:1.4,起始pH自然,接种量10%(相对于干物料),通过中间补水和翻曲,31℃培养72h,最高酶活可达3183IU/g干曲。对酶学性质初步研究显示:酶的最适反应温度和pH分别为70℃和3.5,低于60℃、pH5.0~8.0酶稳定,Ca2+、EDTA对酶有激活作用,Mn2+、Pb2+、Sn2+、Fe3+、Cu2+、Al3+、Fe2+对酶有一定的抑制作用。

关键词:  , &beta, -甘露聚糖酶, 宇佐美曲霉, 固态发酵, 酶学性质

Abstract: The production of acidic β-mannanase was studied by solid state fermentation with the strain Aspergillus usamii YL-01-78.The optimal koji plate fermentation conditions were as follows: the ratio of water to dry medium 1.4:1, initial pH natural and inoculum size 10%(related to dry medium). With these conditions, the acidic β-mannanase activity reached 3183IU/g dry medium at 31℃ for 72h by adding water and turning koji. The optimal temperature and pH for β-mannanase reaction were 70℃ and 3.5 respectively. The enzyme shows a high stability at pH5.0~8.0 and below 60℃. The enzyme activity is stimulated by Ca2+ and EDTA and inhibited by Mn2+, Pb2+, Sn2+, Fe3+, Cu2+, Al3+ and Fe2+.

Key words:  , &beta, -mannanase; Aspergillus usamii; solid state fermentation; enzyme properties;