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High-field spin-label EPR of lipid membranes

✍ Scribed by Derek Marsh; Dieter Kurad; Vsevolod A. Livshits

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
177 KB
Volume
43
Category
Article
ISSN
0749-1581

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✦ Synopsis

High-field EPR of spin-labelled lipid chains has proved to be an extremely productive means for biophysical investigations of phospholipid bilayer membranes. Results on the following three topics are reviewed:

  1. Non-axial ordering of lipid chains in cholesterol-containing membranes; 2. Transmembrane polarity profiles and water penetration in lipid membranes; 3. Role of HF-EPR in multi-frequency spectral simulations to investigate lipid-chain dynamics in membranes.

These results are obtained from phosphatidylcholine spin probes with the nitroxide systematically stepped down the sn-2 chain, in fully hydrated bilayer membranes of dimyristoyl phosphatidylcholine (DMPC)-containing cholesterol.

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