Molecular arrangements of sphingolipids. The monolayer behaviour of ceramides
Chemistry and Physics of Lipids, ISSN: 0009-3084, Vol: 20, Issue: 4, Page: 273-284
1977
- 147Citations
- 39Captures
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Metrics Details
- Citations147
- Citation Indexes147
- 147
- CrossRef133
- Captures39
- Readers39
- 39
Article Description
A series of synthetic ceramides have been studied at the air-water interface by recording the surface pressure-area isotherms at continuous compression. Ceramides that contain a 4,5- trans -double bond in the long chain base were found to condense into a close-packed arrangement with vertical chains already at a very low surface pressure. The corresponding saturated compounds adopt a similar close packed arrangement only at high surface pressure. At 30 dynes/cm, a lateral pressure representative of biological membranes, the area per molecule and compressibility was further found to depend on the number and configuration of the hydroxyl groups. The presence of a 2-D-hydroxyl group in the fatty acud generally promotes the condensation. A similar effect is observed if the long chain base contains a 4-D-hydroxyl group. Cis -double bonds or methyl branches in the fatty acid chain, which increase the space requirement, limit the lateral interaction of the polar group. However the 15- cis -double bond of nervonic acid can be accommodated without any distortion of the close-packing arrangement.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/0009308477900688; http://dx.doi.org/10.1016/0009-3084(77)90068-8; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0017636970&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/597969; https://linkinghub.elsevier.com/retrieve/pii/0009308477900688; http://dx.doi.org/10.1016/0009-3084%2877%2990068-8; https://dx.doi.org/10.1016/0009-3084%2877%2990068-8
Elsevier BV
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