PMID: 8593277Jan 31, 1996Paper

Fluorescent styryl dyes of the RH series affect a potential drop on the membrane/solution boundary

Biochimica Et Biophysica Acta
D Y Malkov, V S Sokolov

Abstract

The effects of the adsorption of the fluorescent potential-sensitive dyes RH-421, RH-237 and RH-160 on the bilayer lipid membrane were studied. It was shown that a dipole potential drop, positive in the hydrophobic part of the membrane, arose due to the dye adsorption. The dye adsorption led to a considerable increase of the rate constant of hydrophobic anion translocation through the membrane, but did not affect their partition coefficient between membrane and water. It implies that the region of the membrane where the potential drops is located deeper than the adsorption plane of hydrophobic ions. The values of boundary potential differences were estimated by two independent methods with unilateral and bilateral application of the dyes to lipid bilayer membranes. The results suggest that RH dye molecules penetrate through the lipid bilayers. The values of zeta-potential in liposomes did not change on dye adsorption. Hence, dye molecules are adsorbed in a form that does not change the surface charge. We estimated the effects of electric field of dye dipole layer on an individual dipole located in the same layer and on ion transport through a membrane protein Na+/K+-ATPase. It turned out that the local electric field of each dy...Continue Reading

Citations

Apr 15, 2010·Journal of Fluorescence·Magda PrzybyloMarek Langner
Jan 12, 2002·Bioelectrochemistry·Victor I Passechnik, Valerii S Sokolov
Aug 2, 2003·Bioelectrochemistry·Ludmila V SchaginaValery V Malev
Feb 12, 1998·Annals of the New York Academy of Sciences·D Y MalkovV S Sokolov
Jan 26, 2012·PloS One·Olga S OstroumovaLudmila V Schagina
Oct 3, 2012·PloS One·Olga S OstroumovaLudmila V Schagina
Dec 15, 2015·European Biophysics Journal : EBJ·Svetlana S EfimovaOlga S Ostroumova
Oct 17, 2013·The Journal of Membrane Biology·Olga S OstroumovaLudmila V Schagina
Feb 24, 2001·Advances in Colloid and Interface Science·R J Clarke
Oct 12, 2015·The Journal of Membrane Biology·Svetlana S EfimovaOlga S Ostroumova
Jul 25, 1997·Biochimica Et Biophysica Acta·R J Clarke
Sep 12, 1998·Biochimica Et Biophysica Acta·E E PohlP Pohl
Apr 30, 2011·Biochimica Et Biophysica Acta·Olga S OstroumovaLudmila V Schagina
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Mar 8, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Olga S OstroumovaLudmila V Schagina
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Jun 19, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Svetlana S Efimova, Olga S Ostroumova

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