کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1936992 | 1050706 | 2007 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Mode of antibacterial action of a signal peptide, Pep27 from Streptococcus pneumoniae Mode of antibacterial action of a signal peptide, Pep27 from Streptococcus pneumoniae](/preview/png/1936992.png)
The aim of this study was to assess the in vitro antimicrobial activity of Pep27 and its mode of action. The results indicated Pep27 exhibited antibacterial activities against pathogenic Gram-positive and Gram-negative bacteria without hemolytic effect on human erythrocytes, but it did not exhibit antifungal activity. To understand the mode of action of Pep27, the cellular distribution of the peptide was investigated. Flow cytometry analysis exhibited Pep27 penetrated the bacterial membrane by an energy-independent pathway without any damage to the membrane when examined using liposome and membrane probe. After penetration into the bacterial cells, Pep27 was not affected by macromolecular synthesis, but activated protein phosphatase activity in dose ranges of 10–15 μM and time range of 5–10 min in case of Staphylococcus epidermidis and Pseudomonas aeruginosa, respectively. These results demonstrated the antibacterial activities of Pep27 are fundamentally attributable to a physiological change by activated phosphatase activity.
Journal: Biochemical and Biophysical Research Communications - Volume 363, Issue 3, 23 November 2007, Pages 806–810