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  GPI-anchored proteins do not reside in ordered domains in the live cell plasma membrane.

Sevcsik, E., Brameshuber, M., Fölser, M., Weghuber, J., Honigmann, A., & Schütz, G. J. (2015). GPI-anchored proteins do not reside in ordered domains in the live cell plasma membrane. Nature Communications, 6: 6969. doi:10.1038/ncomms7969.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-A3B7-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-21A8-E
Genre: Journal Article

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Sevcsik, E., Author
Brameshuber, M., Author
Fölser, M., Author
Weghuber, J., Author
Honigmann, A.1, Author              
Schütz, G. J., Author
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1Department of NanoBiophotonics, MPI for biophysical chemistry, Max Planck Society, ou_578627              

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 Abstract: The organization of proteins and lipids in the plasma membrane has been the subject of a long-lasting debate. Membrane rafts of higher lipid chain order were proposed to mediate protein interactions, but have thus far not been directly observed. Here we use protein micropatterning combined with single-molecule tracking to put current models to the test: we rearranged lipid-anchored raft proteins (glycosylphosphatidylinositol(GPI)-anchored-mGFP) directly in the live cell plasma membrane and measured the effect on the local membrane environment. Intriguingly, this treatment does neither nucleate the formation of an ordered membrane phase nor result in any enrichment of nanoscopic-ordered domains within the micropatterned regions. In contrast, we find that immobilized mGFP-GPIs behave as inert obstacles to the diffusion of other membrane constituents without influencing their membrane environment over distances beyond their physical size. Our results indicate that phase partitioning is not a fundamental element of protein organization in the plasma membrane.

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Language(s): eng - English
 Dates: 2015-04-21
 Publication Status: Published online
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 Rev. Method: Peer
 Identifiers: DOI: 10.1038/ncomms7969
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Title: Nature Communications
Source Genre: Journal
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Pages: 10 Volume / Issue: 6 Sequence Number: 6969 Start / End Page: - Identifier: -