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In vitro measurement of sphingolipid intermembrane transport illustrated by GLTP superfamily members

Kenoth R, Brown R.E,
Published in Springer New York
PMID: 30790260
Volume: 1949
Pages: 237 - 256
Herein, we describe methodological approaches for measuring in vitro transfer of sphingolipids (SLs) between membranes. The approaches rely on direct tracking of the lipid. Typically, direct tracking involves lipid labeling via attachment of fluorophores or introduction of radioactivity. Members of the GlycoLipid Transfer Protein (GLTP) superfamily are used to illustrate two broadly applicable methods for direct lipid tracking. One method relies on Förster resonance energy transfer (FRET) that enables continuous assessment of fluorophore-labeled SL transfer in real time between lipid donor and acceptor vesicles. The second method relies on tracking of radiolabeled SL transfer by separation of lipid donor and acceptor vesicles at discrete time points. The assays are readily adjustable for assessing lipid transfer (1) between various model membrane assemblies (vesicles, micelles, bicelles, nanodiscs), (2) involving other lipid types by other lipid transfer proteins, (3) with protein preparations that are either crudely or highly purified, and (4) that is spontaneous and occurs in the absence of protein. © Springer Science+Business Media, LLC, part of Springer Nature 2019.
About the journal
JournalData powered by TypesetMethods in Molecular Biology Intracellular Lipid Transport
PublisherData powered by TypesetSpringer New York
Open Access0