Abstract
Specific interactions between a mitochondrial hemoprotein cytochrome c (cyt c) and cardiolipin, a lipid component of mitochondrial membrane, are crucial to electron shuttling and apoptotic activities of this protein. In the present study the Förster resonance energy transfer (FRET) between anthrylvinyl-labeled phosphatidylcholine as a donor and heme moiety of cyt c as an acceptor was employed to give a quantitative characterization of the protein binding to the model membranes from the mixtures of phosphatidylcholine (PC) with phosphatidylglycerol (PG), phosphatidylserine (PS) or cardiolipin (CL) in different molar ratios. The multiple arrays of the FRET data were globally analyzed in terms of the model of energy transfer in two-dimensional systems combined with the scaled particle adsorption model. The arguments in favor of the specificity of cyt c interactions with CL were obtained, including the higher adsorption potential and the deeper protein insertion in the lipid bilayer.
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This work was supported by the grant No 0116U000937 for Young Scientists from the Ministry of Education Science and of Ukraine.
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Gorbenko, G.P., Trusova, V. & Molotkovsky, J.G. Förster Resonance Energy Transfer Study of Cytochrome c—Lipid Interactions. J Fluoresc 28, 79–88 (2018). https://doi.org/10.1007/s10895-017-2176-1
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DOI: https://doi.org/10.1007/s10895-017-2176-1