畜牧兽医学报 ›› 2015, Vol. 46 ›› Issue (4): 650-656.doi: 10.11843/j.issn.0366-6964.2015.04.020

• 基础兽医 • 上一篇    下一篇

猪肝羧酸酯酶1基因的克隆和在原核细胞中的功能性表达

肖启玲1,2,李朋辉1,2,闫秉芳3,杨路1,2,王喜亮1,2,肖运才1,2,李自力1,2,刘梅1,2,毕丁仁1,2,石德时1,2*   

  1. (1.华中农业大学动物医学院,农业微生物学国家重点实验室,武汉 430070;2.华中农业大学动物医学院,农业部兽用诊断制剂创制重点实验室,武汉 430070;3.罗德岛大学生物医学科学系,药物基因组学与分子治疗中心,金士顿02881,美国)
  • 收稿日期:2014-07-04 出版日期:2015-04-23 发布日期:2015-04-23
  • 通讯作者: 石德时,E-mail:rock@mail.hzau.edu.cn
  • 作者简介:肖启玲(1989-),女,四川达州人,硕士,主要从事药物代谢酶的分子生物学研究,Tel:027-87280032,E-mail:xiaoqilingk@sina.com
  • 基金资助:

    国家自然科学基金(31372484);湖北省自然科学基金(2012FFB02906);中央高校基本科研业务费专项资金(2011PY117)

Cloning and Functional Expression of Pig Liver Esterase 1 Gene in Prokaryotic Cells

XIAO Qi-ling1,2,LI Peng-hui1,2,YAN Bing-fang3,YANG Lu1,2,WANG Xi-liang1,2,XIAO Yun-cai1,2,LI Zi-li1,2,LIU Mei1,2,BI Ding-ren1,2,SHI De-shi1,2*   

  1. (1. State Key Laboratory of Agricultural Microbiology,College of Veterinary Medicine,Huazhong Agricultural University,Wuhan 430070,China;2.Key Laboratory of Development of Veterinary Diagnostic Products of Ministry of Agriculture,College of Veterinary Medicine,Huazhong Agricultural University,Wuhan 430070,China;3.Department of Biomedical Sciences,Center for Pharmacogenomics and Molecular Therapy,University of Rhode Island,Kingston 02881,USA)
  • Received:2014-07-04 Online:2015-04-23 Published:2015-04-23
  • Supported by:
     

摘要:

为获得有活性的猪肝羧酸酯酶1(PLE1)并研究其功能,利用RT-PCR与常规PCR方法,从大白猪肝组织中扩增PLE1基因的ORF。将PLE1的ORF序列连接到pET15b原核表达载体,在OrigamiTM2(DE3)中与pGro7质粒共诱导表达,纯化目的蛋白质并检测其酶活性。测序结果表明克隆到PLE1基因编码区全长1 686 bp的片段,该片段编码562个氨基酸。SDS-PAGE和Western blotting 结果显示,PLE1融合蛋白质成功表达,在30 ℃的培养温度下,IPTG诱导6 h后,PLE1重组蛋白质表达量最高,且大部分以可溶性形式存在。酶活性试验结果表明,PLE1融合蛋白质水解底物p-NPA的酶活力为1.24 U。研究结果不仅为研究PLE1水解兽药特性提供高纯度的具有原有酶活性的重组蛋白质,也为PLE同工酶家族其他重要成员的活性功能研究提供理论依据和技术手段。

Abstract:

In order to obtain active pig liver carboxylesterase 1 (PLE1) and study its function,PLE1 were obtained by RT-PCR and normal PCR from large white pig liver. PLE1 ORF was linked into the prokaryotic expression vector pET15b,and was functional expressed in E.coli OrigamiTM 2(DE3) cells which were transformed ahead with pGro7.The target protein was purified and its enzyme activity was tested.The sequencing results showed that total length of PLE1 ORF is 1 686 bp,which coding 562 aa.The SDS-PAGE and Western Blotting results demonstrated that recombinant protein PLE1 was expressed successfully,and the highest amount was acquired after culture in 30 ℃ for 6 h,and most of the protein is soluble,and the recombinant PLE1 hydrolysis activity for p-NPA is 1.24 U.The research results not only provide high purity active PLE1 for the study of PLE1 hydrolysis of veterinary medicine,but also provide the theory basis,technical methods for the function study of other important PLE isoenzymes.

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