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. 2009 Jan;11(1):66-73.
doi: 10.1016/j.micinf.2008.10.004. Epub 2008 Oct 21.

Discovery of new Mycoplasma pneumoniae antigens by use of a whole-genome lambda display library

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Free article

Discovery of new Mycoplasma pneumoniae antigens by use of a whole-genome lambda display library

Elisa Beghetto et al. Microbes Infect. 2009 Jan.
Free article

Abstract

Mycoplasma pneumoniae is the leading cause of atypical pneumonia in children and young adults. Bacterial colonization can occur in both the upper and the lower respiratory tracts and take place both endemically and epidemically worldwide. Characteristically, the infection is chronic in onset and recovery and both humoral and cell-mediated mechanisms are involved in the response to bacterial colonization. To identify bacterial proteins recognized by host antibody responses, a whole-genome M. pneumoniae library was created and displayed on lambda bacteriophage. The challenge of such a library with sera from individuals hospitalized for mycoplasmal pneumonia allowed the identification of a panel of recombinant bacteriophages carrying B-cell epitopes. Among the already known M. pneumoniae B-cell antigens, our results confirmed the immunogenicity of P1 and P30 adhesins. Also, the data presented in this study localized, within their sequences, the immunodominant epitopes recognized by human immunoglobulins. Furthermore, library screening allowed the identification of four novel immunogenic polypeptides, respectively, encoded by fragments of the MPN152, MPN426, MPN456 and MPN-500 open reading frames, highlighting and further confirming the potential of lambda display technology in antigen and epitope discovery.

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