牛环形泰勒虫裂殖子/梨浆虫表面抗原基因非疏水区的克隆及GST-P27重组蛋白的高效表达

Clone of Tams1 Gene Non-hydrophobic Region of Theileria annulata and High Level Expression of Recombinant Protein GST-P27

A fragment about 696 bp was amplified by PCR technique with specific primers based on Tams1 gene sequence（AF214842） of Theileria annulata reported in GenBank. Then the target fragment was directionally cloned into pGEX-4T-2 expression vector, the recombinant plasmid DNA was cut by enzymes, and then sequenced.The result showed that the homology of the cloned Tams1 gene was 98%. The positive plasmid was transformed into BL21（DE3）, and then induced by IPTG. Soluble fusion protein whose expression level reached 1.39 mg/mL was obtained when it was induced with 0.5 mmol/L IPTG for 4 h at 37 ℃, and it was 53 ku. Western blotting showed that recombinant protein GST-P27 which was purified by Glutathione Sepharose 4B had the favorable reactionogenicity.