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Legionella pneumophila lvgA and Hsp60 gene splicing and the fusion gene expression in E.coli / 南方医科大学学报
Journal of Southern Medical University ; (12): 904-909, 2006.
Artigo em Chinês | WPRIM | ID: wpr-282888
ABSTRACT
<p><b>OBJECTIVE</b>To fuse Legionella virulence gene (lvgA) with heat shock protein 60 gene (Hsp60) by PCR and detect the fusion gene expression in E.coli.</p><p><b>METHODS</b>The fragments of lvgA and Hsp60 genes having matching sequences at their ends to be fused were amplified from the genomic DNA of Legionella pneumophila by PCR, and the PCR products were mixed, denatured, reannealed, so that the strands with matching sequences at their 3' ends overlapped to serve as primers for each other. Extension of this overlap by DNA polymerase produced recombinant products. After amplification with outer primers, sufficient product of the fusion gene was harvested, which was inserted into the prokaryotic expression vector pGEX-4T-1 to construct the prokaryotic expression recombinant plasmid. After identification with restriction enzyme analysis, polymerase chain reaction and nucleotide sequence analysis, the E.coli BL21 containing the recombinant plasmid pGlvgA/Hsp60 was induced with IPTG and the expression of lvgA/Hsp60 was detected by SDS-PAGE and Western blot analysis.</p><p><b>RESULTS</b>The lvgA/Hsp60 fusion gene of 2,292 bp was amplified and the recombinant plasmid pGlvgA/Hsp60 was constructed successfully. A 117-kD GST-lvgA-Hsp60 fusion protein was detected in the E.coli containing the recombinant plasmid.</p><p><b>CONCLUSION</b>The recombinant plasmid for Legionella pneumophila lvgA/Hsp60 fusion gene is constructed successfully and this fusion protein can be expressed in prokaryotic cells efficiently, which make possible the immunological characterization of this fusion gene.</p>
Assuntos
Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Plasmídeos / Proteínas Recombinantes de Fusão / Doença dos Legionários / Expressão Gênica / Reação em Cadeia da Polimerase / Clonagem Molecular / Processamento Alternativo / Chaperonina 60 / Vacinas de DNA / Fatores de Virulência Tipo de estudo: Estudo prognóstico Limite: Humanos Idioma: Chinês Revista: Journal of Southern Medical University Ano de publicação: 2006 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Plasmídeos / Proteínas Recombinantes de Fusão / Doença dos Legionários / Expressão Gênica / Reação em Cadeia da Polimerase / Clonagem Molecular / Processamento Alternativo / Chaperonina 60 / Vacinas de DNA / Fatores de Virulência Tipo de estudo: Estudo prognóstico Limite: Humanos Idioma: Chinês Revista: Journal of Southern Medical University Ano de publicação: 2006 Tipo de documento: Artigo