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[Construction and Expression of Vector with mip/flaA Advantages Epitope Genes of Legionella pneumophila]. | LitMetric

Objective: To generate and express fusion vector with mip/flaA advantages epitope genes of Legionella pneumophila by select mip and flaA advantages epitope genes for future research on Legionella pneumophila protein vaccine.

Methods: Following analysis of secondary structure and surface properties such as: physical and chemical properties, hydropathy, plasticity, antigen index and extracellular domain of Mip and FlaA proteins by bioinformatics methods, the region which active epitope may exist was selected as advantages epitope region. Then, the recombinant plasmid pET-mip, pET-flaA and pET-mip/flaA with advantages epitope genes were constructed by PCR amplification and T4 ligase connection, and induced the expression in E. coli.

Results: Many potential antigenic epitopes in Mip and FlaA were identified, and the selected advantages epitope regions were cloned and expressed successfully. Moreover, the mip/flaA two advantages associated epitope fusion proteins were also successfully expressed.

Conclusion: DNA Star software and Expasy online analysis system can successfully predict antigenic epitopes for Legionella pneumophila Mip and FlaA. And prokaryotic expression vector pET-mip/flaA with advantages epitope genes has been successfully constructed and efficiently expressed.

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