食品科学 ›› 2005, Vol. 26 ›› Issue (5): 119-122.

• 基础研究 • 上一篇    下一篇

酸性α-淀粉酶生产菌株的筛选和酶的纯化及酶的性质研究

 陈波, 李大力, 杨树林   

  1. 南京理工大学生物工程教研室
  • 出版日期:2005-05-15 发布日期:2011-09-19

Isolation of Acidα-Amylase Producing Strain and Purification and Characterization of Acidα-Amylase

 CHEN  Bo, LI  Da-Li, YANG  Shu-Lin   

  1. Department of Biology Engineering, Nanjing University of Science and Technology
  • Online:2005-05-15 Published:2011-09-19

摘要: 从土壤中筛选得到一产酸性α-淀粉酶的野生青霉菌株,对其所产酸性α-淀粉酶进行分离纯化,该酶反应的最适pH值为4.4,最适温度为60℃,分子量约为85kD。薄层层析结果表明该酶水解淀粉生成糊精和多种低聚糖。

关键词: 青霉, 酸性&alpha, -淀粉酶, 纯化

Abstract: A strain of acidα-amylase producing fungi was isolated from soil. It was identified as Penicillium. The optimum temperature of acidα-amylase 60℃ and the optimum pH 4.4. The molecular weight of the purified acid α-amylase was about 85kD. The results of thin-layer chromatography demonstrated that the products from starch catalyzed by the enzyme were oligosaccharide and dextrin. This enzyme should be classified as anα-amylase.

Key words: Penicillium, acidα-amylase, purification