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The antimicrobial peptides lactoferricin B and magainin 2 cross over the bacterial cytoplasmic membrane and reside in the cytoplasm

The antimicrobial peptides lactoferricin B and magainin 2 cross over the bacterial cytoplasmic... The localization of immunolabelled antimicrobial peptides was studied using transmission electron microscopy. Staphylococcus aureus and Escherichia coli were exposed to lactoferricin B (17–41), lactoferricin B (17–31) and D‐lactoferricin B (17–31). E. coli was also exposed to cecropin P1 and magainin 2. The lactoferricins were found in the cytoplasm of both bacteria. In S. aureus the amount of cytoplasmic lactoferricin B (17–41) was time‐ and concentration‐dependent, reaching a maximum within 30 min. Cecropin P1 was confined to the cell wall, while magainin 2 was found in the cytoplasm of E. coli. The finding of intracellularly localized magainin is not reported previously. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Febs Letters Wiley

The antimicrobial peptides lactoferricin B and magainin 2 cross over the bacterial cytoplasmic membrane and reside in the cytoplasm

Febs Letters , Volume 508 (3) – Nov 23, 2001

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References (25)

Publisher
Wiley
Copyright
© 2015 Federation of European Biochemical Societies
eISSN
1873-3468
DOI
10.1016/S0014-5793(01)03100-3
Publisher site
See Article on Publisher Site

Abstract

The localization of immunolabelled antimicrobial peptides was studied using transmission electron microscopy. Staphylococcus aureus and Escherichia coli were exposed to lactoferricin B (17–41), lactoferricin B (17–31) and D‐lactoferricin B (17–31). E. coli was also exposed to cecropin P1 and magainin 2. The lactoferricins were found in the cytoplasm of both bacteria. In S. aureus the amount of cytoplasmic lactoferricin B (17–41) was time‐ and concentration‐dependent, reaching a maximum within 30 min. Cecropin P1 was confined to the cell wall, while magainin 2 was found in the cytoplasm of E. coli. The finding of intracellularly localized magainin is not reported previously.

Journal

Febs LettersWiley

Published: Nov 23, 2001

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