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Modification of SARS-CoV S1 gene render expression in Pichia pastoris
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lu, Haisong Yang, Guoliang Fei, Xiaozhan Guo, Hongyan Tan, Yadi Chen, Huanchun Guo, Aizhen |
| Copyright Year | 2006 |
| Abstract | S1 gene fragment containing receptor-binding region was amplified by several sets of primers using Over-Lap PCR. The native S1 gene was modified at A + T abundant regions; n.t.777–1683, n.t.1041–1050, n.t.1236–1248, n.t.1317–1335, n.t.1590–1605; based on the same amino acid sequences. The modified gene was cloned into a yeast expression vector pPIC9K. The resultant plasmid pPIC9K- S1 was transformed into Pichia pastoris GS 115 and the protein expression was induced with methanol. SDS-PAGE confirmed that the recombinant SI was secreted in the supernatant of induced GS 115. The protein yield reached 69 mg/l. ELISA and Western blot demonstrated that the S1 could react with the convalescent sera of people infected by SARS-CoV. Furthermore, ligand blot assay showed that the recombinant S1 could react with ACE2, the receptor of SARS-CoV. The molecular mass of expressed S1 was about 70 kDa, which was higher than that of the 30 kDa expected. PNGase F deglycosylation resulted in a protein band of 30 kDa. In conclusion, the S1 gene modification rendered the high-level expression of S1 in P. pastoris GS 115 and the protein was secreted as a biologically active form which was hyperglycosylated. |
| File Format | HTM / HTML |
| DOI | 10.1007/s11262-006-0072-x |
| Journal | Virus Genes |
| PubMed Central reference number | PMC7088608 |
| PubMed reference number | 16991004 |
| Language | English |
| Publisher | PMC |
| Access Restriction | Open |
| Rights Holder | no-cc |
| Content Type | Text |
| Resource Type | Article Preprint |
