Different modes of membrane permeabilization by two RTX toxins: HlyA from Escherichia coli and CyaA from Bordetella pertussis
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منابع مشابه
Cloning of Bordetella pertussis outer membrane proteins in Escherichia coli.
We constructed and screened a gene bank of phase I chromosomal DNA of Bordetella pertussis in Escherichia coli. A single immunopositive clone was recovered, and the hybrid plasmid obtained, designated pFSH200, had a molecular size of 46.6 kilobases. Smaller derivatives were generated by partial digestion of plasmid pFSH200 and were further characterized. One such derivative, plasmid pFSH201, co...
متن کاملRTX cytotoxins recognize beta2 integrin receptors through N-linked oligosaccharides.
Bordetella pertussis adenylate cyclase (AC) toxin-hemolysin (Hly) (CyaA, ACT, or AC-Hly) is a cytotoxin of the RTX (repeat in toxin) family. It delivers into target cells an AC domain that catalyzes uncontrolled conversion of ATP to cAMP, a key signaling molecule subverting phagocyte functions. CyaA utilizes a heavily N-glycosylated beta(2) integrin receptor CD11b/CD18 (alpha(M)beta(2), Mac-1, ...
متن کاملMembrane-Pore Forming Characteristics of the Bordetella pertussis CyaA-Hemolysin Domain
Previously, the 126-kDa Bordetella pertussis CyaA pore-forming/hemolysin (CyaA-Hly) domain was shown to retain its hemolytic activity causing lysis of susceptible erythrocytes. Here, we have succeeded in producing, at large quantity and high purity, the His-tagged CyaA-Hly domain over-expressed in Escherichia coli as a soluble hemolytically-active form. Quantitative assays of hemolysis against ...
متن کاملModulation of Pertussis and Adenylate Cyclase Toxins by Sigma Factor RpoE in Bordetella pertussis.
Bordetella pertussis is a human pathogen that can infect the respiratory tract and cause the disease known as whooping cough. B. pertussis uses pertussis toxin (PT) and adenylate cyclase toxin (ACT) to kill and modulate host cells to allow the pathogen to survive and persist. B. pertussis encodes many uncharacterized transcription factors, and very little is known about their functions. RpoE is...
متن کاملDetection of eaeA, hlyA, stx1 and stx2 genes in pathogenic Escherichia coli isolated from broilers affected with colibacillosis
Background: Foodborne outbreaks associated with shiga toxin-producing Escherichia coli (STEC) have been well documented worldwide. STECs are major causative agents of gastroenteritis in humans that may be complicated by hemorrhagic colitis (HC), hemolytic uremic syndrome (HUS), and thrombotic thrombocytopenia purpura (TTP). OBJECTIVES: The aim of this study was to investigate the presence of vi...
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ژورنال
عنوان ژورنال: Biochimica et Biophysica Acta (BBA) - Biomembranes
سال: 2009
ISSN: 0005-2736
DOI: 10.1016/j.bbamem.2009.03.019