Podkalicka, J.* ; Biernatowska, A.* ; Majkowski, M.* ; Grzybek, M. ; Sikorski, A.F.*
MPP1 as a factor regulating phase separation in giant plasma membrane-derived vesicles.
Biophys. J. 108, 2201-2211 (2015)
The existence of membrane-rafts helps to conceptually understand the spatiotemporal organization of membrane-associated events (signaling, fusion, fission, etc.). However, as rafts themselves are nanoscopic, dynamic, and transient assemblies, they cannot be directly observed in a metabolizing cell by traditional microscopy. The observation of phase separation in giant plasma membrane-derived vesicles from live cells is a powerful tool for studying lateral heterogeneity in eukaryotic cell membranes, specifically in the context of membrane rafts. Microscopic phase separation is detectable by fluorescent labeling, followed by cooling of the membranes below their miscibility phase transition temperature. It remains unclear, however, if this lipid-driven process is tuneable in any way by interactions with proteins. Here, we demonstrate that MPP1, a member of the MAGUK family, can modulate membrane properties such as the fluidity and phase separation capability of giant plasma membrane-derived vesicles. Our data suggest that physicochemical domain properties of the membrane can be modulated, without major changes in lipid composition, through proteins such as MPP1.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Typ der Hochschulschrift
Herausgeber
Schlagwörter
Tight Junction Protein; Maguk Family; Physiological Temperature; Promotes Synaptogenesis; Immunological Synapse; Cell Polarity; Lipid Rafts; T-cells; Palmitoylation; Domains
Keywords plus
Sprache
englisch
Veröffentlichungsjahr
2015
Prepublished im Jahr
HGF-Berichtsjahr
2015
ISSN (print) / ISBN
0006-3495
e-ISSN
1542-0086
ISBN
Bandtitel
Konferenztitel
Konferzenzdatum
Konferenzort
Konferenzband
Quellenangaben
Band: 108,
Heft: 9,
Seiten: 2201-2211
Artikelnummer: ,
Supplement: ,
Reihe
Verlag
Elsevier
Verlagsort
Cambridge
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0000-00-00
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Gutachter
Prüfer
Topic
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Hochschulort
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Veröffentlichungsdatum
0000-00-00
Anmeldedatum
0000-00-00
Anmelder/Inhaber
weitere Inhaber
Anmeldeland
Priorität
Begutachtungsstatus
Peer reviewed
Institut(e)
Institute of Pancreatic Islet Research (IPI)
POF Topic(s)
90000 - German Center for Diabetes Research
Forschungsfeld(er)
Helmholtz Diabetes Center
PSP-Element(e)
G-502600-002
Förderungen
Copyright
Erfassungsdatum
2015-05-10