Nanoscale structure of lipid domain boundaries

Matthew Nussio, Rachel Lowe, Nicolas Voelcker, Benjamin Flavel, Christopher Gibson, Matthew Sykes, John Miners, Joseph Shapter

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)

    Abstract

    Analysis of membrane domain segregation and phase separation is important for the understanding of cell membrane structure and function. In this paper, we report an atomic force microscopy approach using both derivatised tip functionalities and force-volume imaging for the analysis of membrane phase separation. Simultaneous topology and mapping of interaction forces of binary component phospholipid bilayer membranes were performed. Measurements enabled the lateral mapping of bilayer lipid composition at a resolution of 10-20 nm, providing insights into dynamic membrane structure and behaviour. Very sharp boundaries between the two domains are observed in addition to domain boundaries that are quite diffuse with both lipids intermixing. Additionally, some nanoscale domains of one lipid within the domain of the second lipid are observed. The sharp boundaries of the large domains are observed in regions close to these nanodomains.

    Original languageEnglish
    Pages (from-to)2193-2199
    Number of pages7
    JournalSoft Matter
    Volume6
    Issue number10
    DOIs
    Publication statusPublished - 2010

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