Construction and Expression of SLA-1 Prokaryotic Expressing Vector in Yorkshire Pig |
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| Authors: | ZHANG Xiu-juan YANG Jie SUN Yong-qiang GAO Feng-shan |
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| Institution: | College of Life Science and Technology, Dalian University, Dalian 116622, China |
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| Abstract: | In order to construct the prokaryotic expressing vector of SLA-1 derived form Yorkshire pig and express the interest of protein, a pair of primers was designed to amplify the extracellular domain of SLA-1 gene from Yorkshire pig (named SLA-1-DYKe) by PCR. Then the PCR product was cloned into pMD®19-T Simple Vector and transformed into Escherichia coli TOP10. After cleaved by Nde Ⅰ and Xho Ⅰ, the positive clones were selected to be sequenced. Analyzing by biological soft, the fragment from positive clone with correct sequence was inserted into pET-28a (+) and transformed into E.coli BL21(DE3). After induction and expression, the interest of protein was detected by SDS-PAGE. The results showed that the extracellular domain of SLA-1-DYKe was successfully amplified with the fragment length of 837 bp. The interest of SLA-1 gene was successfully cloned into pMD®19-T Simple Vector and the positive recombinant plasmids with correct sequences were obtained. The SLA-1-DYKe from positive recombinant plasmids was further inserted into pET-28a(+). After transformed into E.coli BL21(DE3) and induction, the SLA-1-DYKe was successfully expressed. The molecular weight of the protein was about 34 ku. It was concluded that the prokaryotic expressing vector of SLA-1 was constructed successfully from Yorkshire pigs and then the expressed protein was obtained, which would lay a base for studying on the structure and function of SLA-1 from Yorkshire pig in the future. |
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| Keywords: | Yorkshire pig SLA-1 gene prokaryotic expressing vector |
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