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High expression level of soluble SARS spike protein mediated by adenovirus in HEK293 cells
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作者 Fei zhong zhen-yu zhong +1 位作者 Shuang Liang Xiu-Jin Li 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第9期1452-1457,共6页
AIM: To develop a highly efficacious method for preparation of soluble SAPS S-protein using adenovirus vector to meet the requirement for S-protein investigation. METHODS: The human adenovirus vector was used to exp... AIM: To develop a highly efficacious method for preparation of soluble SAPS S-protein using adenovirus vector to meet the requirement for S-protein investigation. METHODS: The human adenovirus vector was used to express the soluble S-protein (corresponding to 1-1190 amino acids) fused with Myc/His tag using codon-optimized gene construct in HEK239 cells. The recombinant adenovirus bearing S-protein gene was generated by ligation method. The expressed S-protein with Myc/His tag was purified from culture medium with Ni-NTA agarose beads followed by dialysis. The S-protein was detected by Western blot and its biologic activity was analyzed by binding to Vero cells. RESULTS: Under the conditions of infection dose (MOI of 50) and expression time (48 h), the high-level expression of S-protein was obtained. The expression level was determined to be approximately 75 μg/106 cells after purification. Purified soluble S-protein was readily detected by Western blot with anti-Myc antibody and showed the ability to bind to surface of Vero cells, demonstrating that the soluble S-protein could remain the biologic activity in the native molecule. CONCLUSION: The high-level expression of S-protein in HEK293 cells mediated by adenovirus can be achieved under the optimized expression conditions. The proteins possess the biologic activity, which lays a foundation for further investigation of S-protein biological function. 展开更多
关键词 SARS-COV S-PROTEIN Expression
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