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[Cloning, purification, and antigenic characterization of three recombinant fragments derived from SARS-CoV S1 domain].
- Source :
-
Zhonghua shi yan he lin chuang bing du xue za zhi = Zhonghua shiyan he linchuang bingduxue zazhi = Chinese journal of experimental and clinical virology [Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi] 2005 Sep; Vol. 19 (3), pp. 275-8. - Publication Year :
- 2005
-
Abstract
- Objective: The present study aimed to clone and express three fragments of genomic RNA derived from SARS associated coronavirus (SARS-CoV) S1 domain and to study its immunogenicity.<br />Methods: The S1 domain gene was amplified by PCR with specific primers and was inserted into the prokaryotic expression vector pQE-30. Three fragments (40-751, 746-1344 and 746-2001 bp) derived from S1 domain produced after the recombinant plasmid (pQE-30/S1) was digested by restriction endonucleases. The three fragments were cloned into pQE-30 and expressed in M15 strains of Escherichia coli. The expression products, designated S1a, S1b and S1c respectively, were purified by Ni affinity chromatography. The immunogenicity was analyzed by Western Blot and ELISA using serologically confirmed sera from SARS patients and the sera from healthy donors was used as control at the same assay.<br />Results: Three recombinant plasmids (pQE-30/S1a, pQE-30/S1b, pQE-30/S1c) were constructed.Fusion proteins with relative molecular mass of 26,700, 22,500 and 46,000 dalton were successfully expressed with amounts of 35%, 35% and 30% of total cell protein and purified by Ni affinity chromatography, respectively. Western Blot and ELISA analysis showed that the S1c protein could be specifically recognized by the sera from SARS patients.<br />Conclusion: The recombinant S1c protein was a good immunogen and has the potential to be used as a vaccine against SARS-CoV infection.
- Subjects :
- Antibodies, Viral blood
Antigens, Surface genetics
Antigens, Surface immunology
Antigens, Surface metabolism
Blotting, Western
Electrophoresis, Polyacrylamide Gel
Enzyme-Linked Immunosorbent Assay
Humans
Immunoglobulin G blood
Immunoglobulin M blood
Plasmids genetics
Polymerase Chain Reaction
Recombinant Proteins immunology
Recombinant Proteins isolation & purification
Severe acute respiratory syndrome-related coronavirus genetics
Severe acute respiratory syndrome-related coronavirus immunology
Severe Acute Respiratory Syndrome blood
Severe Acute Respiratory Syndrome virology
Viral Envelope Proteins genetics
Viral Envelope Proteins immunology
Viral Envelope Proteins metabolism
Recombinant Proteins metabolism
Severe acute respiratory syndrome-related coronavirus metabolism
Subjects
Details
- Language :
- Chinese
- ISSN :
- 1003-9279
- Volume :
- 19
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Zhonghua shi yan he lin chuang bing du xue za zhi = Zhonghua shiyan he linchuang bingduxue zazhi = Chinese journal of experimental and clinical virology
- Publication Type :
- Academic Journal
- Accession number :
- 16261215