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Sezgin, E.* ; Gutmann, T. ; Buhl, T.* ; Dirkx, R. ; Grzybek, M. ; Coskun, Ü. ; Solimena, M. ; Simons, K.* ; Levental, I.* ; Schwille, P.*

Adaptive lipid packing and bioactivity in membrane domains.

PLoS ONE 10:e0123930 (2015)
Verlagsversion DOI
Open Access Gold
Creative Commons Lizenzvertrag
Lateral compositional and physicochemical heterogeneity is a ubiquitous feature of cellular membranes on various length scales, from molecular assemblies to micrometric domains. Segregated lipid domains of increased local order, referred to as rafts, are believed to be prominent features in eukaryotic plasma membranes; however, their exact nature (i.e. size, lifetime, composition, homogeneity) in live cells remains difficult to define. Here we present evidence that both synthetic and natural plasma membranes assume a wide range of lipid packing states with varying levels of molecular order. These states may be adapted and specifically tuned by cells during active cellular processes, as we show for stimulated insulin secretion. Most importantly, these states regulate both the partitioning of molecules between coexisting domains and the bioactivity of their constituent molecules, which we demonstrate for the ligand binding activity of the glycosphingolipid receptor GM1. These results confirm the complexity and flexibility of lipid-mediated membrane organization and reveal mechanisms by which this flexibility could be functionalized by cells.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Cell-membranes; Generalized Polarization; Fluorescent-probe; Plasma-membranes; Raft Mixtures; Vesicles; Model; Laurdan; Phases; Microscopy
ISSN (print) / ISBN 1932-6203
Zeitschrift PLoS ONE
Quellenangaben Band: 10, Heft: 4, Seiten: , Artikelnummer: e0123930 Supplement: ,
Verlag Public Library of Science (PLoS)
Verlagsort Lawrence, Kan.
Begutachtungsstatus Peer reviewed
Institut(e) Institute for Pancreatic Beta Cell Research (IPI)