Journal
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
Volume 55, Issue 7, Pages 3594-3597Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AAC.01764-10
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Funding
- NIH [2R44AI052894-02]
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health
- National Institute of Allergy and Infectious Diseases (NIAID)
- ARISTEIA (Excellence in Research Institutes of the Greek GSRT)
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We compared the abilities of structurally related cationic cyclodextrins to inhibit Bacillus anthracis lethal toxin and Staphylococcus aureus alpha-hemolysin. We found that both beta- and gamma-cyclodextrin derivatives effectively inhibited anthrax toxin action by blocking the transmembrane oligomeric pores formed by the protective antigen (PA) subunit of the toxin, whereas alpha-cyclodextrins were ineffective. In contrast, alpha-hemolysin was selectively blocked only by beta-cyclodextrin derivatives, demonstrating that both symmetry and size of the inhibitor and the pore are important.
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