title: Identification of immunogenic polypeptides from a Mycoplasma hyopneumoniae genome library by phage display.
abstract: The identification of immunogenic polypeptides of pathogens is helpful for the development of diagnostic assays and therapeutic applications like vaccines. Routinely, these proteins are identified by two-dimensional polyacrylamide gel electrophoresis and Western blot using convalescent serum, followed by mass spectrometry. This technology, however, is limited, because low or differentially expressed proteins, e.g. dependent on pathogen-host interaction, cannot be identified. In this work, we developed and improved a M13 genomic phage display-based method for the selection of immunogenic polypeptides of Mycoplasma hyopneumoniae, a pathogen causing porcine enzootic pneumonia. The fragmented genome of M. hyopneumoniae was cloned into a phage display vector, and the genomic library was packaged using the helperphage Hyperphage to enrich open reading frames (ORFs). Afterwards, the phage display library was screened by panning using convalescent serum. The analysis of individual phage clones resulted in the identification of five genes encoding immunogenic proteins, only two of which had been previously identified and described as immunogenic. This M13 genomic phage display, directly combining ORF enrichment and the presentation of the corresponding polypeptide on the phage surface, complements proteome-based methods for the identification of immunogenic polypeptides and is particularly well suited for the use in mycoplasma species.
authors.affiliation: Abteilung Biotechnologie, Institut für Biochemie und Biotechnologie, Technische Universität Braunschweig, Braunschweig, Germany.
authors.forename: Jonas
authors.initials: J
authors.lastname: Kügler
authors.forename: Simone
authors.initials: S
authors.lastname: Nieswandt
authors.forename: Gerald F
authors.initials: GF
authors.lastname: Gerlach
authors.forename: Jochen
authors.initials: J
authors.lastname: Meens
authors.forename: Thomas
authors.initials: T
authors.lastname: Schirrmann
authors.forename: Michael
authors.initials: M
authors.lastname: Hust
mesh_terms: D000942:Antigens, Bacterial / Q000235:genetics / Q000276:immunology; D001426:Bacterial Proteins / Q000235:genetics / Q000276:immunology; D017104:Bacteriophage M13 / Q000235:genetics / Q000378:metabolism; D015698:Genomic Library; D008969:Molecular Sequence Data; D045705:Mycoplasma hyopneumoniae / Q000235:genetics / Q000276:immunology*; D016366:Open Reading Frames; D019151:Peptide Library; D010455:Peptides / Q000235:genetics / Q000276:immunology*
chemical_list: D000942:Antigens, Bacterial; D001426:Bacterial Proteins; D019151:Peptide Library; D010455:Peptides