Non-thiol-activated property of a cholesterol-binding hemolysin produced byVibrio vulnificus
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منابع مشابه
Inhibition of binding of Vibrio vulnificus hemolysin (VVH) by MβCD.
Vibrio vulnificus secrets a pore-forming toxin called Vibrio vulnificus hemolysin (VVH). In this study, we showed that methyl-beta-cyclodextrin (MβCD), an oligosaccharide, decreased binding of VVH to Chinese hamster ovary (CHO) cells, resulting in inhibition of its cytotoxicity. When the VVH was incubated with MβCD, cytotoxicity of the toxin was inhibited from 100.3 ± 7.2% to 19.6 ± 5.3%. Bindi...
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Enterohemolysin produced by Escherichia coli associated with infant diarrhea showed characteristics similar to those of thiol-activated hemolysins produced by Gram-positive bacteria, including inactivation by cholesterol, lytic activity towards eukaryotic cells and thermoinstability. However, enterohemolysin activity was not inactivated by oxidation or by SH group-blocking agents (1 mM HgCl2, 1...
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The mechanisms by which proteins gain entry into membranes is a fundamental problem in biology. Here, we present the first crystal structure of a thiol-activated cytolysin, perfringolysin O, a member of a large family of toxins that kill eukaryotic cells by punching holes in their membranes. The molecule adopts an unusually elongated shape rich in beta sheet. We have used electron microscopy da...
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Arcanobacterium (Actinomyces) pyogenes, an animal pathogen, produces a hemolytic exotoxin, pyolysin (PLO). The gene encoding PLO was cloned, and sequence analysis revealed an open reading frame of 1,605 bp encoding a protein of 57.9 kDa. PLO has 30 to 40% identity with the thiol-activated cytolysins (TACYs) of a number of gram-positive bacteria. The activity of PLO was found to be very similar ...
متن کاملCloning of the cytotoxin-hemolysin gene of Vibrio vulnificus.
Genes encoding the cytotoxin-hemolysin of Vibrio vulnificus were cloned in Escherichia coli by using the lytic cloning vector, lambda 1059. Subcloning in plasmid pBR325 resulted in the isolation of a 3.2-kilobase DNA fragment containing the cytotoxin gene. By using this fragment as a DNA probe, homologous gene sequences were detected in all 54 V. vulnificus strains studied; homologous sequences...
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ژورنال
عنوان ژورنال: FEMS Microbiology Letters
سال: 1985
ISSN: 0378-1097,1574-6968
DOI: 10.1111/j.1574-6968.1985.tb01014.x