生物技术通报 ›› 2018, Vol. 34 ›› Issue (4): 214-220.doi: 10.13560/j.cnki.biotech.bull.1985.2017-0946

• 研究报告 • 上一篇    

黄孢原毛平革菌漆酶基因lac1680的克隆、表达及产酶研究

陈建军1, 刘梁涛1, 曹香林2   

  1. 1. 河南师范大学生命科学学院,新乡 453007;
    2. 河南师范大学水产学院,新乡 453007
  • 收稿日期:2017-11-09 出版日期:2018-04-20 发布日期:2018-05-04
  • 作者简介:陈建军,男,副教授,研究方向:应用微生物;E-mail:cjjjianjun@163.com
  • 基金资助:
    国家自然科学基金项目(5201049120029),河南省重点科技攻关计划项目(122102210168,152102210081)

Cloning,Expression and Enzyme Production of Laccase Gene lac1680 in Phanerochaete chrysosporium

CHEN Jian-jun1, LIU Liang-tao1, CAO Xiang-lin2   

  1. 1. College of Life Sciences,Henan Normal University,Xinxiang 453007;
    2. College of Aquaculture,Henan Normal University,Xinxiang 453007
  • Received:2017-11-09 Published:2018-04-20 Online:2018-05-04

摘要: 以先前筛选到的高产漆酶黄孢原毛平革菌(Phanerochaete chrysosporium)为模板,利用同源克隆技术合成一个全长为1 680 bp的漆酶基因,核苷酸及氨基酸序列比对显示该基因与真菌漆酶基因有较高的同源性,将其命名为lac1680,将该基因连接到构建好的pET24a载体上,并转入表达菌株BL21 Escherichia coli(DE3)中,经对重组菌预表达的全菌裂解物进行SDS-PAGE检测,获得75 kD目的条带,表明诱导表达成功。随后利用NI-NTA层析柱对洗脱下来的lac1680蛋白进行纯化,纯化回收后,漆酶纯度可达98%以上。通过对比基因工程菌和黄孢原毛平革菌野生菌株不同培养时间产酶活力,结果表明构建好的工程菌活力比原菌酶活力有明显的提高,提高了近39%。

关键词: 黄孢原毛平革菌, 漆酶基因, 异源表达, 蛋白纯化, 酶活力

Abstract: In this study,previously screened highly laccase-yielding Phanerochaete chrysosporium as template,homologous cloning technology was employed to synthesize a full-length 1680 bp laccase gene. Alignment of nucleotide and amino acid sequences showed that the gene had high homology with fungal laccase gene,named as lac1680. Then the gene was connected to the pET24a vector,and transferred to the expression strain Escherichia coli BL21(DE3). The whole cell lysates by the pre-expression of the recombinant strain was detected by SDS-PAGE,and 75 kD band was obtained,thus indicating that the gene expressed successfully. NI-NTA column was then used to purify the eluted lac1680 protein,and the purity was over 98%. Comparing the enzyme-producing activities between the gene engineering strain and wild P. chrysosporium strain in different culture time showed that the activity of engineering strain obviously improved by nearly 39% than the wild one.

Key words: Phanerochaete chrysosporium, laccase gene, heterogeneous expression, protein purification, enzyme activity