Production of Highly Active Recombinant Dermonecrotic Toxin of Bordetella Pertussis.
Toxins (Basel)
; 12(9)2020 09 15.
Article
em En
| MEDLINE
| ID: mdl-32942577
ABSTRACT
Pathogenic Bordetella bacteria release a neurotropic dermonecrotic toxin (DNT) that is endocytosed into animal cells and permanently activates the Rho family GTPases by polyamination or deamidation of the glutamine residues in their switch II regions (e.g., Gln63 of RhoA). DNT was found to enable high level colonization of the nasal cavity of pigs by B. bronchiseptica and the capacity of DNT to inhibit differentiation of nasal turbinate bone osteoblasts causes atrophic rhinitis in infected pigs. However, it remains unknown whether DNT plays any role also in virulence of the human pathogen B. pertussis and in pathogenesis of the whooping cough disease. We report a procedure for purification of large amounts of LPS-free recombinant DNT that exhibits a high biological activity on cells expressing the DNT receptors Cav3.1 and Cav3.2. Electron microscopy and single particle image analysis of negatively stained preparations revealed that the DNT molecule adopts a V-shaped structure with well-resolved protein domains. These results open the way to structure-function studies on DNT and its interactions with airway epithelial layers.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Bordetella pertussis
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Fatores de Virulência de Bordetella
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Transglutaminases
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Células Epiteliais
Limite:
Animals
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Humans
Idioma:
En
Revista:
Toxins (Basel)
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
República Tcheca