Phg, a novel member of the autotransporter family present in Bordetella species
| Autor: | Nicole Guiso, Roy Gross, Barbara Middendorf, Dorothee Stübs, Heike Deppisch, Thilo M. Fuchs |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Bordetella pertussis
Bordetella Whooping Cough Mutant Molecular Sequence Data Virulence Microbiology Mice Bacterial Proteins Animals Amino Acid Sequence Virulence Factors Bordetella Lung biology digestive oral and skin physiology Respiratory infection Membrane Transport Proteins biology.organism_classification respiratory tract diseases Autotransporter domain Female Pertactin Autotransporters Bacterial Outer Membrane Proteins |
| Zdroj: | Microbiological Research. 160(3):329-336 |
| ISSN: | 0944-5013 |
| DOI: | 10.1016/j.micres.2005.02.007 |
| Popis: | Several proteins encoded in the genomes of Bordetella species show significant sequence similarity to the autotransporter domains of surface exposed or secreted virulence factors of bordetellae such as pertactin, tracheal colonization factor or Vag8. One of these putative autotransporters, provisionally termed Phg, is encoded by the pertactin homologous gene (phg), which is highly conserved in Bordetella pertussis, B. bronchiseptica and B. parapertussis, but absent in B. avium and B. petrii. In contrast to homologues with documented functions in host interaction and virulence, several key amino acids probably involved in proteolytic processing of the autotransporter domain are not conserved in Phg. The transcription start site of phg was identified by primer extension analysis, but differential transcription of phg could not be detected in B. bronchiseptica strains under conditions that lead to enhanced expression of other known Bordetella autotransporter proteins. A mutant of B. pertussis was constructed in which major parts of phg are substituted by a kanamycin resistance cassette. Virulence testing of this mutant in a mouse respiratory infection model showed the same colonization properties as the wild-type strain. |
| Databáze: | OpenAIRE |
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