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Lipid Internal Dynamics Probed in Nanodiscs

Martinez, Denis and Decossas, Marion and Kowal, Julia and Frey, Lukas and Stahlberg, Henning and Dufourc, Erick J. and Riek, Roland and Habenstein, Birgit and Bibow, Stefan and Loquet, Antoine. (2017) Lipid Internal Dynamics Probed in Nanodiscs. ChemPhysChem, 18 (19). pp. 2651-2657.

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Official URL: http://edoc.unibas.ch/56290/

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Abstract

Nanodiscs offer a very promising tool to incorporate membrane proteins into native-like lipid bilayers and an alternative to liposomes to maintain protein functions and protein-lipid interactions in a soluble nanoscale object. The activity of the incorporated membrane protein appears to be correlated to its dynamics in the lipid bilayer and by protein-lipid interactions. These two parameters depend on the lipid internal dynamics surrounded by the lipid-encircling discoidal scaffold protein that might differ from more unrestricted lipid bilayers observed in vesicles or cellular extracts. A solid-state NMR spectroscopy investigation of lipid internal dynamics and thermotropism in nanodiscs is reported. The gel-to-fluid phase transition is almost abolished for nanodiscs, which maintain lipid fluid properties for a large temperature range. The addition of cholesterol allows fine-tuning of the internal bilayer dynamics by increasing chain ordering. Increased site-specific order parameters along the acyl chain reflect a higher internal ordering in nanodiscs compared with liposomes at room temperature; this is induced by the scaffold protein, which restricts lipid diffusion in the nanodisc area.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Structural Biology & Biophysics > Structural Biology (Stahlberg)
UniBasel Contributors:Stahlberg, Henning
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Wiley
ISSN:1439-4235
e-ISSN:1439-7641
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:12 Oct 2017 09:24
Deposited On:12 Oct 2017 09:24

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