Smeazzetto, S. ; Tadini-Buoninsegni, F. ; Thiel, Gerhard ; Berti, D. ; Montis, C. (2016)
Phospholamban spontaneously reconstitutes into giant unilamellar vesicles where it generates a cation selective channel.
In: Physical chemistry chemical physics : PCCP, 18 (3)
doi: 10.1039/c5cp05893g
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Phospholamban (PLN) is a small integral membrane protein, which modulates the activity of the Sarcoplasmic Reticulum Ca(2+)-ATPase (SERCA) of cardiac myocytes. PLN, as a monomer, can directly interact and tune SERCA activity, but the physiological function of the pentameric form is not yet fully understood and still debated. In this work, we reconstituted PLN in Giant Unilamellar Vesicles (GUVs), a simple and reliable experimental model system to monitor the activity of proteins in membranes. By Laser Scanning Confocal Microscopy (LSCM) and Fluorescence Correlation Spectroscopy (FCS) we verified a spontaneous reconstitution of PLN into the phospholipid bilayer. In parallel experiments, we measured with the patch clamp technique canonical ion channel fluctuations, which highlight a preference for Cs(+) over K(+) and do not conduct Ca(2+). The results prove that PLN forms, presumably in its pentameric form, a cation selective ion channel.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Smeazzetto, S. ; Tadini-Buoninsegni, F. ; Thiel, Gerhard ; Berti, D. ; Montis, C. |
| Art des Eintrags: | Bibliographie |
| Titel: | Phospholamban spontaneously reconstitutes into giant unilamellar vesicles where it generates a cation selective channel. |
| Sprache: | Englisch |
| Publikationsjahr: | 2016 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical chemistry chemical physics : PCCP |
| Jahrgang/Volume einer Zeitschrift: | 18 |
| (Heft-)Nummer: | 3 |
| DOI: | 10.1039/c5cp05893g |
| Kurzbeschreibung (Abstract): | Phospholamban (PLN) is a small integral membrane protein, which modulates the activity of the Sarcoplasmic Reticulum Ca(2+)-ATPase (SERCA) of cardiac myocytes. PLN, as a monomer, can directly interact and tune SERCA activity, but the physiological function of the pentameric form is not yet fully understood and still debated. In this work, we reconstituted PLN in Giant Unilamellar Vesicles (GUVs), a simple and reliable experimental model system to monitor the activity of proteins in membranes. By Laser Scanning Confocal Microscopy (LSCM) and Fluorescence Correlation Spectroscopy (FCS) we verified a spontaneous reconstitution of PLN into the phospholipid bilayer. In parallel experiments, we measured with the patch clamp technique canonical ion channel fluctuations, which highlight a preference for Cs(+) over K(+) and do not conduct Ca(2+). The results prove that PLN forms, presumably in its pentameric form, a cation selective ion channel. |
| Fachbereich(e)/-gebiet(e): | 10 Fachbereich Biologie 10 Fachbereich Biologie > Plant Membrane Biophyscis (am 20.12.23 umbenannt in Biologie der Algen und Protozoen) |
| Hinterlegungsdatum: | 22 Dez 2015 11:04 |
| Letzte Änderung: | 01 Mär 2016 07:43 |
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