期刊
FEBS LETTERS
卷 586, 期 16, 页码 2529-2534出版社
WILEY
DOI: 10.1016/j.febslet.2012.06.021
关键词
Bacteria multi-drug tolerance; Toxin/antitoxin system; Biofilms; Cluster pore structure
资金
- Intramural Research Program of the Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH
- NIH [3R01-GM061162-05A1, 3R01-GM061162-10S1]
We studied membrane activity of the bacterial peptide TisB involved in persister cell formation. TisB and its analogs form multi-state ion-conductive pores in planar lipid bilayers with all states displaying similar anionic selectivity. TisB analogs differing by +/- 1 elementary charges show corresponding changes in selectivity. Probing TisB pores with poly-(ethylene glycol)s reveals only restricted partitioning even for the smallest polymers, suggesting that the pores are characterized by a relatively small diameter. These findings allow us to suggest that TisB forms clusters of narrow pores that are essential for its mechanism of action. Published by Elsevier B.V. on behalf of the Federation of European Biochemical Societies.
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