食品科学

• 生物工程 • 上一篇    下一篇

菠萝泛菌β-1,4-内切葡聚糖酶基因克隆、表达与酶活性分析

侯进慧,张 翔,乔高翔   

  1. 徐州工程学院食品工程学院,江苏 徐州 221111
  • 出版日期:2016-12-15 发布日期:2016-12-21

Cloning, Expression and Activity of an Endo-1,4-β-D-Glucanase from Pantoea ananatis

HOU Jinhui, ZHANG Xiang, QIAO Gaoxiang   

  1. College of Food Engineering, Xuzhou Institute of Technology, Xuzhou 221111, China
  • Online:2016-12-15 Published:2016-12-21

摘要: 利用分子克隆的方法,对一种源于菠萝泛菌的内切葡聚糖酶(即β-1,4-内切葡聚糖酶)基因进行克隆、原核表达,利用Ni-NTA吸附柱对表达的重组内切葡聚糖酶进行纯化,分析重组酶的活性。研究结果显示,此重组内切葡聚糖酶含1 个1 002 bp的开放阅读框,编码334 个氨基酸序列,重组酶在大肠杆菌细胞中的表达量占可溶性蛋白的50%以上,经过纯化获得了纯度高于95%的内切葡聚糖酶蛋白,酶活力可以达到2 245 U/mL。

关键词: 内切葡聚糖酶, 原核表达, 活性分析

Abstract: The endo-1,4-β-D-glucanase gene from Pantoea ananatis was cloned and expressed in Escherichia coli. The
recombinant enzyme was purified with Ni-NTA affinity chromatography and its activity was analyzed. The results showed
that the recombinant glucanase gene contained a 1 002 bp-length open reading frame encoding two putative peptides of
334 amino acids. The expression of the recombinant enzyme in E. coli reached up to 50% of the total soluble protein. After
purification, the purity was higher than 95% and glucanase activity was as high as 2 245 U/mL.

Key words: endo-1,4-β-D-glucanase, prokaryotic expression, activity analysis

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