Characterization of Post-Translational Modifications and Cytotoxic Properties of the Adenylate-Cyclase Hemolysin Produced by Various Bordetella pertussis and Bordetella parapertussis Isolates
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چکیده
منابع مشابه
Characterization of Post-Translational Modifications and Cytotoxic Properties of the Adenylate-Cyclase Hemolysin Produced by Various Bordetella pertussis and Bordetella parapertussis Isolates
Bordetella pertussis and Bordetella parapertussis are the causal agents of whooping cough in humans. They produce diverse virulence factors, including adenylate cyclase-hemolysin (AC-Hly), a secreted toxin of the repeat in toxins (RTX) family with cyclase, pore-forming, and hemolytic activities. Post-translational modifications (PTMs) are essential for the biological activities of the toxin pro...
متن کاملBordetella Adenylate Cyclase-Hemolysin Toxins
Adenylate cyclase-hemolysin toxin is secreted and produced by three classical species of the genus Bordetella: Bordetella pertussis, B. parapertussis and B. bronchiseptica. This toxin has several properties such as: (i) adenylate cyclase activity, enhanced after interaction with the eukaryotic protein, calmodulin; (ii) a pore-forming activity; (iii) an invasive activity. It plays an important r...
متن کاملCharacterization of adenylate cyclase-hemolysin gene duplication in a Bordetella pertussis isolate.
We describe a clinical isolate of Bordetella pertussis, the agent responsible for whooping cough, composed of at least two clones harboring one or two copies of the cya locus encoding one of the major toxins, adenylate cyclase-hemolysin. No difference was observed between the two clones in murine and cellular models, probably due to the high instability of the cya locus duplication.
متن کاملAdenylate cyclase toxin (ACT) from Bordetella hinzii: characterization and differences from ACT of Bordetella pertussis.
Bordetella hinzii is a commensal respiratory microorganism in poultry but is increasingly being recognized as an opportunistic pathogen in immunocompromised humans. Although associated with a variety of disease states, practically nothing is known about the mechanisms employed by this bacterium. In this study, we show by DNA sequencing and reverse transcription-PCR that both commensal and clini...
متن کاملStimulation of Bordetella pertussis adenylate cyclase toxin intoxication by its hemolysin domain.
The internalization of the N-terminal catalytic domain of Bordetella pertussis adenylate cyclase toxin (ACT) across the cytoplasmic membrane has been considered to occur independently from protein-protein interactions which can lead to oligomerization required for hemolytic activity by its C-terminal hemolysin domain. Here we report that when added in excess, this hemolysin domain stimulates th...
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ژورنال
عنوان ژورنال: Toxins
سال: 2017
ISSN: 2072-6651
DOI: 10.3390/toxins9100304