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Hexagonal packing of lipid acyl chains and membrane plasticity

✍ Scribed by Dorset, D. L. ;Hui, S. W. ;Strozewski, C. M.

Book ID
102925490
Publisher
Wiley (John Wiley & Sons)
Year
1976
Tongue
English
Weight
974 KB
Volume
5
Category
Article
ISSN
0091-7419

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✦ Synopsis

Abstract

Electron microscope and electron diffraction observations on microcrystals of pure lipids (a phosphatidylethanolamine, two phosphatidylcholines, a phosphatidic acid, and a galactocerebroside) reveal an extreme flexibility of lipid layers when the acyl chains are hexagonally packed (d~100~ = 4.17 Γ…). This is corroborated by similar observations on wet bilayers of a lecithin. It is shown that more β€œcrystalline” polymethylene packings do not impart such plasticity to lipid layers and are therefore an unsuitable structural matrix for dynamic biological membranes.

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