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[Cloning, purification, and antigenic characterization of three recombinant fragments derived from SARS-CoV S1 domain].

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.

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.

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.

CONCLUSION

The recombinant S1c protein was a good immunogen and has the potential to be used as a vaccine against SARS-CoV infection.

Authors+Show Affiliations

Central Laboraory, Zhujiang Hospital, The First Military Medical University, Guangzhou 510282, China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

English Abstract
Journal Article

Language

chi

PubMed ID

16261215

Citation

Mei, Ya-bo, et al. "[Cloning, Purification, and Antigenic Characterization of Three Recombinant Fragments Derived From SARS-CoV S1 Domain]." Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi = Zhonghua Shiyan He Linchuang Bingduxue Zazhi = Chinese Journal of Experimental and Clinical Virology, vol. 19, no. 3, 2005, pp. 275-8.
Mei YB, Liao ZY, Wang YD, et al. [Cloning, purification, and antigenic characterization of three recombinant fragments derived from SARS-CoV S1 domain]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi. 2005;19(3):275-8.
Mei, Y. B., Liao, Z. Y., Wang, Y. D., Zhang, L. Y., Xu, H., Yuen, K. Y., & Che, X. Y. (2005). [Cloning, purification, and antigenic characterization of three recombinant fragments derived from SARS-CoV S1 domain]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi = Zhonghua Shiyan He Linchuang Bingduxue Zazhi = Chinese Journal of Experimental and Clinical Virology, 19(3), 275-8.
Mei YB, et al. [Cloning, Purification, and Antigenic Characterization of Three Recombinant Fragments Derived From SARS-CoV S1 Domain]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi. 2005;19(3):275-8. PubMed PMID: 16261215.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Cloning, purification, and antigenic characterization of three recombinant fragments derived from SARS-CoV S1 domain]. AU - Mei,Ya-bo, AU - Liao,Zhi-yong, AU - Wang,Ya-di, AU - Zhang,Li-ya, AU - Xu,Hua, AU - Yuen,Kwok-yung, AU - Che,Xiao-yan, PY - 2005/11/2/pubmed PY - 2008/12/23/medline PY - 2005/11/2/entrez SP - 275 EP - 8 JF - Zhonghua shi yan he lin chuang bing du xue za zhi = Zhonghua shiyan he linchuang bingduxue zazhi = Chinese journal of experimental and clinical virology JO - Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi VL - 19 IS - 3 N2 - 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. 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. 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. CONCLUSION: The recombinant S1c protein was a good immunogen and has the potential to be used as a vaccine against SARS-CoV infection. SN - 1003-9279 UR - https://www.unboundmedicine.com/medline/citation/16261215/[Cloning_purification_and_antigenic_characterization_of_three_recombinant_fragments_derived_from_SARS_CoV_S1_domain]_ L2 - https://www.diseaseinfosearch.org/result/6415 DB - PRIME DP - Unbound Medicine ER -