Structural preferences of phosphatidylinositol and phosphatidylinositol-phosphatidylethanolamine model membranes influence of Ca 2+ and Mg 2+
Biochimica et Biophysica Acta (BBA) - Biomembranes, ISSN: 0005-2736, Vol: 688, Issue: 1, Page: 169-176
1982
- 40Citations
- 11Captures
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Metrics Details
- Citations40
- Citation Indexes40
- CrossRef40
- 37
- Captures11
- Readers11
- 11
Article Description
The structural preferences of soya phosphatidylinositol in isolation and in mixtures with soya phosphatidylethanolamine, and the influence of Ca 2+ and Mg 2+ on these preferences, have been examined employing 31 P-NMR and freeze-fracture techniques. It is shown that phosphatidylinositol assumes the bilayer organization on hydration both in the presence and absence of Ca 2+ and Mg 2+. In mixed systems with H II phase) phosphatidylethanolamine, phosphatidylinositol induces lipidic particle structure at low (<10 mol%) concentrations and bilayer structure at higher levels. In systems containing 15 or 20 mol% phosphatidylinositol, Ca 2+ (but not Mg 2+ ) can induce H II phase structure. The results indicate that phosphatidylinositol is a more effective agent than other acidic phospholipids for stabilizing bilayer structure, particularly when high levels of divalent cations are present. These findings are discussed in terms of functional roles of phosphatidylinositol and mechanisms whereby Ca 2+ induces structural reorganization in mixed systems containing acidic phospholipids and phosphatidylethanolamine.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/0005273682905922; http://dx.doi.org/10.1016/0005-2736(82)90592-2; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0020488263&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/7093273; https://linkinghub.elsevier.com/retrieve/pii/0005273682905922; http://dx.doi.org/10.1016/0005-2736%2882%2990592-2; https://dx.doi.org/10.1016/0005-2736%2882%2990592-2
Elsevier BV
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