›› 2012, Vol. 39 ›› Issue (1): 23-27.

• 生物技术 • 上一篇    下一篇

宇佐美曲霉木聚糖酶在哺乳动物细胞中的分泌表达

张茂1, 邹娴2, 林纯2, 刘德武2, 吴珍芳2, 蔡更元1   

  1. 1. 广东省农业科学院畜牧研究所 畜禽育种国家重点实验室 广东省动物育种与营养公共实验室,广东广州 510640;2. 华南农业大学动物科学学院,广东广州 510642
  • 收稿日期:1900-01-01 修回日期:2011-06-21 出版日期:2012-01-20 发布日期:2012-01-20
  • 通讯作者: 蔡更元

Aspergillus usamii Xylanase Secrete Expression in Mammalian Cells

ZHANG Mao1, ZOU Xian2, LIN Chun2, LIU De-wu2, WU Zhen-fang2, CAI Geng-yuan1   

  1. 1. State Key Laboratory of Animal Breeding, Guangdong Public Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences,Guangzhou 510640, China;2. College of Animal Science, South China Agricultural University,Guangzhou 510642, China
  • Received:1900-01-01 Revised:2011-06-21 Online:2012-01-20 Published:2012-01-20

摘要: 本试验旨在从宇佐美曲霉菌株GIM3.36中克隆得到木聚糖酶基因xyn的成熟肽编码序列(555 bp),并将其克隆到真核表达载体pcDNA6/HisTM A中的不同位置,分别得到重组质粒pcDNA-spna和pcDNA-spnb,重组质粒经过酶切、测序鉴定其读码框的正确性。在脂质体介导下将重组质粒转染猪肾细胞(PK15),通过RT-PCR证实其在PK15细胞中表达,并在细胞培养液中测定木聚糖酶酶活,结果显示,重组质粒pcDNA-spna转染细胞后表达的酶活力最高为8.53 U/mL,较pcDNA-spnb表达的酶活(6.87 U/mL)高24%,实现了微生物基因在哺乳动物细胞的分泌表达,为xyn基因在转基因方面的利用提供了依据。

关键词: 宇佐美曲霉; 木聚糖酶; 哺乳动物细胞; 分泌表达

Abstract: The mature peptide coding sequence of xylanase gene xyn (555 bp) was amplified by RT-PCR from Aspergillus niger GIM 3.36 total RNA extracts. It was subcloned into different locations of the eukaryotic expressing plasmid vector pcDNA6/HisTM A. The recombinant plasmid pcDNA-spna and pcDNA-spnb was identified by PCR, enzyme digestion and DNA sequencing. The result showed that the recombinant plasmids were constructed correctly. Meanwhile, the PK15 cells were transfected with pcDNA-spna and pcDNA-spnb by cationic liposome, and the mRNA of the target gene was determined by RT-PCR. The maximum yield of the recombinant xylanase (transfected pcDNA-spna) in cell culture medium was 8.53 U/mL and higher 24% the recombinant xylanase 6.87 U/mL (transfected pcDNA-spnb). To achieve the purpose that microbiology secrete expression in mammalian cells and provided basis for using xyn gene to transgenic.

Key words: Aspergillus usamii; xylanase; mammalian cells; secrete expression

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