畜牧兽医学报 ›› 2015, Vol. 46 ›› Issue (1): 124-129.doi: 10.11843/j.issn.0366-6964.2015.01.016

• 预防兽医 • 上一篇    下一篇

牛α0干扰素在毕赤酵母中的分泌表达及抗病毒活性鉴定

彭统全,邵建伟,张润祥,曹翀,马波,高明春*,王君伟*   

  1. (东北农业大学 动物医学学院,哈尔滨 150030)
  • 收稿日期:2014-05-26 出版日期:2015-01-23 发布日期:2015-01-23
  • 通讯作者: 王君伟,教授,E-mail:jwwang@neau.edu.cn;高明春,E-mail:gaomingchun@163.com
  • 作者简介:彭统全(1987-),男,河南商丘人,硕士生,主要从事兽医微生物与免疫学研究,E-mail:ptqneau@126.com
  • 基金资助:

    现代农业(奶牛)产业技术体系(CARS-37);国家科技支撑计划项目(2012BAD12B05);国家科技支撑计划子课题(2012BAD12B03-3);黑龙江省科技攻关项目(GA09B302)

Expression of the Bovine Interferon Alpha0 with Antiviral Activity in Pichia Pastoris

PENG Tong-quan,SHAO Jian-wei,ZHANG Run-xiang,CAO Chong,MA Bo,GAO Ming-chun*,WANG Jun-wei*   

  1. (College of Veterinary Medicine,Northeast Agricultural University,Harbin 150030,China)
  • Received:2014-05-26 Online:2015-01-23 Published:2015-01-23

摘要:

克隆牛α0干扰素(BoIFN-α0)成熟肽基因,使其在真核细胞中表达,并研究其表达蛋白质的活性。通过PCR方法扩增得到BoIFN-α0成熟肽基因,然后将其连接到含分泌信号肽序列的Pichia pastoris表达载体 pPICZαA 上,构建重组质粒pPICZαA-BoIFN-α0,重组质粒经PmeⅠ酶切线性化后电转化宿主菌GS115。转化子经100 μg•mL-1 zeocinTM筛选和PCR鉴定,阳性重组菌经甲醇诱导后实现了BoIFN-α0在毕赤酵母系统中的分泌表达。结果表明:SDS-PAGE和Western blot结果显示表达产物相对分子质量约为18 和21 ku,推测表达产物发生了一定程度的糖基化。细胞病变抑制试验结果表明,重组BoIFN-α0具有较高的抗病毒活性,达到5.72×106 U•mg-1。这些研究结果为牛IFN-α的更深层次应用奠定了基础。

Abstract:

In this study,we cloned BoIFN-α0 mature peptide gene and expressed it in the eukaryocyte, and also studied the activity of this protein.To achieve secretary expression of bovine interferon-α0 (BoIFN-α0 ) in Pichia pastoris,the BoIFN-α0 mature peptide gene was synthesized by PCR and inserted into the secreted expression vector pPICZαA.The Pme Ⅰ linearized resultant recombinant plasmid was transformed into P.pastoris GS115 by electroporation and the positive recombinant strains P.pastoris were selected by 100 μg•mL-1 of zeocinTM and identified by PCR with the AOX1 primers and the specific primers.The positive recombinant strains were induced with methanol and achieved secretory expression in P.pastoris Yeast expression system.The products in culture medium were detected by SDS-PAGE and Western blot.The SDS-PAGE results showed that the recombinant protein was expressed in the supernatant with molecular of 18 and 21 kDa (with the difference of glycosylation).Furthermore,the BoIFN-α0 was able to efficiently inhibiting virus replication in vesicular stomatitis virus (VSV)/MDBK cells detection system and its antiviral activity was about 5.72×106 U•mg-1.These results provided a basis for further application of BoIFN-α.

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