›› 2017, Vol. 44 ›› Issue (1): 30-37.doi: 10.16431/j.cnki.1671-7236.2017.01.004

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Cloning,Sequence Analysis and Prokaryotic Expression of Mink Interleukin-4 Gene

FAN Si-ning1, ZHANG Hai-ling2, ZHAO Jian-jun2, WANG Yang2, HU Bo2, LV Shuang2, MA Fan-shu2, LI Xin-tong2, LING Ming-yu1, ZHAO Hui1, LIAN Shi-zhen2, YAN Xi-jun2   

  1. 1. College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China;
    2. Division of Infectious Diseases of Special Economic Animal, Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130112, China
  • Received:2016-06-20 Online:2017-01-20 Published:2017-01-19

Abstract:

In order to obtain high purity of interleukin 4 (IL-4) protein,the specific primers were designed and synthesized according to the mink IL-4 gene sequence in GenBank. The IL-4 gene was amplified by RT-PCR using total RNA of the lymphocyte isolated from the peripheral blood that induced by phytohemagglutinin (PHA). The length of IL-4 gene sequence was 399 bp which encoded 132 amino acids. Phylogenetic analysis revealed that the amino acid sequences homology between mink and ferret was 99.2%,90.0% with Ailuropoda melanoleuca and Canis familiaris. Prokaryotic expression vector pProEX-HTb-IL-4 was constructed and induced by IPTG. The recombinant protein of 15 ku was isolated by SDS-PAGE and detected by Western blotting. Highly purified recombinant protein of mink IL-4 was obtained by His-Trap HP affinity columns method. This research laid the foundation for the further studies on the biological function of mink IL-4 gene.

Key words: mink; interleukin-4; sequence analysis; prokaryotic expression

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