title: Purification of the recombinant beta2 toxin (CPB2) from an enterotoxaemic bovine Clostridium perfringens strain and production of a specific immune serum.
abstract: Overgrowth of Clostridium perfringens clones with production of one or more of its toxin(s) results in diverse digestive and systemic pathologies in human and animals, such as cattle enterotoxaemia. The so-called beta2 toxin (CPB2) is the most recently described major toxin produced by C. perfringens. In this study, the cpb2 ORF (cpb2FM) from a cattle C. perfringens-associated enterotoxaemia was cloned and sequenced. The cpb2FM and its deduced nucleotide sequence clearly corresponded to the cpb2 allele considered as "consensus" and not to "atypical" allele, despite its "non-porcine" origin. Expression assays of the recombinant toxin CPB2FM were performed in Escherichia coli and Bacillus subtilis with the expression vector pBLTS72, and by genomic integration by double recombination in B. subtilis. Highest level of production was obtained with the expression vector in B. subtilis 168 strain. The recombinant CPB2FM protein was purified and a specific rabbit polyclonal antiserum was produced. Polyclonal antibodies could detect CPB2 production in supernatants of C. perfringens from enterotoxaemic cattle.
authors.affiliation: Department of Infectious and Parasitic Diseases-Bacteriology, Faculty of Veterinary Medicine, University of Liège, Liège 4000, Belgium. maude.lebrun@ulg.ac.be
authors.forename: M
authors.initials: M
authors.lastname: Lebrun
authors.forename: P
authors.initials: P
authors.lastname: Filée
authors.forename: M
authors.initials: M
authors.lastname: Galleni
authors.forename: J G
authors.initials: JG
authors.lastname: Mainil
authors.forename: A
authors.initials: A
authors.lastname: Linden
authors.forename: B
authors.initials: B
authors.lastname: Taminiau
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001412:Bacillus subtilis / Q000235:genetics; D001427:Bacterial Toxins / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology*; D002417:Cattle; D003001:Cloning, Molecular; D003016:Clostridium perfringens / Q000235:genetics / Q000302:isolation & purification; D004926:Escherichia coli / Q000235:genetics; D005838:Genotype; D007106:Immune Sera / Q000276:immunology*; D007114:Immunization; D008969:Molecular Sequence Data; D010957:Plasmids / Q000235:genetics; D011817:Rabbits; D011994:Recombinant Proteins / Q000096:biosynthesis* / Q000276:immunology* / Q000302:isolation & purification
chemical_list: D001427:Bacterial Toxins; D007106:Immune Sera; D011994:Recombinant Proteins; C109896:cpb2 protein, Clostridium perfringens