کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5507049 | 1536897 | 2017 | 5 صفحه PDF | دانلود رایگان |
- Translocation of short poly-arginines across the MOMP channel has been determined.
- Penta-arginine and Hepta-arginine translocate across the MOMP channel.
- Voltage dependent kinetics to distinguish binding from translocation.
Here we report on translocation of short poly-arginines across the MOMP porin, the major outer membrane protein in the cell wall of Campylobacter jejuni. MOMP was purified to homogeneity from a pathogenic strain of C. jejuni. Its reconstitution in lipid membranes and measuring the ion-current revealed two main distinct populations of protein channels which we interpreted as mono and trimers. Addition of poly-arginines causes concentration and voltage dependent ion-current fluctuations. Increasing the transmembrane potential decreases the residence time of the peptide inside the channel indicating successful translocation. We conclude that poly-arginines can cross the outer membrane of Campylobacter through the MOMP channel.
Journal: Biochemistry and Biophysics Reports - Volume 11, September 2017, Pages 79-83