Abstract:
:High titered Clostridium sordellii lethal toxin antiserum, cross-reactive with C. difficile cytotoxin B (ToxB), was used to isolate toxB fragments from a C. difficile expression library. Recombinant clones containing toxB fragments of the 5' and 3' end were isolate. A 2.5-kb HincII fragment of chromosomal DNA overlaps both groups of clones. A partial restriction map of the total toxB gene is presented. The gene is positioned upstream of utxA and toxA, toxB has a size of 6.9 kb, corresponding to a 250-kDa polypeptide. A partial sequence of the 5' end of toxB was determined. The sequence contains 398 bp upstream of toxB with a putative Shine-Dalgarno box (AGGAGA) and 609 bp of the toxB open reading frame. The N-terminal 203 amino acids of ToxB were compared with the N-terminal amino acids of the enterotoxin A (ToxA). A homology of 64% of the residues was detected, which proves the relatedness of ToxA and ToxB of C. difficile.
journal_name
Med Microbiol Immunoljournal_title
Medical microbiology and immunologyauthors
von Eichel-Streiber C,Laufenberg-Feldmann R,Sartingen S,Schulze J,Sauerborn Mdoi
10.1007/BF00192465subject
Has Abstractpub_date
1990-01-01 00:00:00pages
271-9issue
5eissn
0300-8584issn
1432-1831journal_volume
179pub_type
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