PMID: 737173Dec 19, 1978Paper

Laser Raman studies of molecular interactions with phosphatidylcholine multilayers. II. Effects of mono- and divalent ions on bilayer structure

Biochimica Et Biophysica Acta
E Loshchilova, B Karvaly

Abstract

Laser Raman spectroscopy was applied to characterize structural behavior of dipalmitoyl phosphatidylcholine multibilayer systems in the presence of several cations (K+, Na+, Cs+, Rb+, Ca2+, Mg2+, Cd2+, Ba2+) and anions Cl-, Br-, I-, NO-3, SO2-3, SO2-4, S2O2-3, S2O2-8). To evaluate the Raman-spectroscopical data quantitatively, characteristic intensity ratios, lateral and trans order parameters were used and compared. It was shown that the different trans order parameters are rather sensitive to ion-polar head group interactions and thus, they cannot give unequivocal information on the trans-gauche isomerization of hydrocarbon chains of phospholipids. The observed effects of ions on Raman spectra of phospholipid multilayers could not be explained simply on the basis of electrostatic interactions. The possible involvement of other factors (changes in polarizability, hydrogen bonds, etc.) is also discussed. It was demonstrated that the order parameters defined in different ways may result in different effectiveness sequences of ions. Of monopositive ions Na+ was found to be the most effective to influence the bilayer structure. For dipositive ions, of which Ca2+ proved to be the most effective, concentration-dependent effectivenes...Continue Reading

References

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Citations

Feb 23, 2012·Scientific Reports·Maik HadornPeter Eggenberger Hotz
Dec 21, 1983·Biochimica Et Biophysica Acta·J F HahnL J Lis
Mar 27, 2007·Biophysical Journal·Hari LeontiadouSiewert-Jan Marrink
Aug 6, 2013·The Journal of Physical Chemistry. B·Pradip K TarafdarMusti J Swamy
Dec 30, 1987·European Journal of Biochemistry·S A Tatulian
Jan 8, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Joanna Kotyńska, Monika Naumowicz
Jan 1, 1986·Chemistry and Physics of Lipids·B A CunninghamL J Lis
Mar 1, 1988·Chemistry and Physics of Lipids·B A CunninghamL J Lis

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