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Kruk J, Myśliwa-Kurdziel B, Jemioła-Rzeminiska M, Strzałka K. Fluorescence Lifetimes Study of α-Tocopherol and Biological Prenylquinols in Organic Solvents and Model Membranes. Photochem Photobiol 2006; 82:1309-14. [PMID: 17421077 DOI: 10.1562/2006-04-14-ra-872] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We have found that for biological prenyllipids, such as plastoquinol-9, alpha-tocopherol quinol, and alpha-tocopherol, the shortest fluorescence lifetimes were found in aprotic solvents (hexane, ethyl acetate) whereas the longest lifetimes were those of ubiquinonol-10 in these solvents. For all the investigated prenyllipids, fluorescence lifetime in alcohols increased along with an increase in solvent viscosity. In a concentrated hexane solution, the lifetimes of prenylquinols considerably decreased. This contrasts with methanol solutions, which is probably due to the self-association of these compounds in aprotic solvents. We have also found a correlation of the Stokes shift of prenyllipids fluorescence with the orientation polarizability of the solvents. Based on data obtained in organic solvents, measurements of the fluorescence lifetimes of prenyllipids in liposomes allowed an estimation of the relative distance of their fluorescent rings from the liposome membrane surface, and was found to be the shortest for alpha-tocopherol quinol in egg yolk phosphatidylcholine liposomes, and increased in the following order: alpha-tocopherol in dipalmitoyl phosphatidylcholine liposomes < alpha-tocopherol < plastoquinol-9 < ubiquinol-10 in egg-yolk phosphatidylcholine liposomes.
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Affiliation(s)
- Jerzy Kruk
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland.
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Razeghifard MR, Kim S, Patzlaff JS, Hutchison RS, Krick T, Ayala I, Steenhuis JJ, Boesch SE, Wheeler RA, Barry BA. In Vivo, in Vitro, and Calculated Vibrational Spectra of Plastoquinone and the Plastosemiquinone Anion Radical. J Phys Chem B 1999. [DOI: 10.1021/jp991942x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Reza Razeghifard
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, St. Paul, Minnesota 55108, and Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
| | - Sunyoung Kim
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, St. Paul, Minnesota 55108, and Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
| | - Jason S. Patzlaff
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, St. Paul, Minnesota 55108, and Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
| | - Ronald S. Hutchison
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, St. Paul, Minnesota 55108, and Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
| | - Thomas Krick
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, St. Paul, Minnesota 55108, and Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
| | - Idelisa Ayala
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, St. Paul, Minnesota 55108, and Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
| | - Jacqueline J. Steenhuis
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, St. Paul, Minnesota 55108, and Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
| | - Scott E. Boesch
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, St. Paul, Minnesota 55108, and Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
| | - Ralph A. Wheeler
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, St. Paul, Minnesota 55108, and Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
| | - Bridgette A. Barry
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, St. Paul, Minnesota 55108, and Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019
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Skowronek M, Jemioła-Rzemińska M, Kruk J, Strzałka K. Influence of the redox state of ubiquinones and plastoquinones on the order of lipid bilayers studied by fluorescence anisotropy of diphenylhexatriene and trimethylammonium diphenylhexatriene. BIOCHIMICA ET BIOPHYSICA ACTA 1996; 1280:115-9. [PMID: 8634304 DOI: 10.1016/0005-2736(95)00264-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The measurements of diphenylhexatriene (DPH) and trimethylammonium diphenylhexatriene (TMA-DPH) fluorescence anisotropy in egg yolk lecithin (EYL) and of DPH anisotropy in dipalmitoylphosphatidylcholine (DPPC) liposomes containing different concentrations of oxidized and reduced ubiquinone (UQ) and plastoquinone (PQ) homologues have been performed. All the oxidized UQ homologues strongly induced ordering of EYL membrane structure, whereas in DPPC liposomes, above the phase transition temperature, the most pronounced effect showed UQ-4. PQ-2 and PQ-9 were less effective than the corresponding ubiquinones in this respect. The reduced forms of UQ and PQ homologues increased the order of membrane lipids to a smaller extent than the corresponding quinones both in the interior of the membrane and closer to its surface. Nevertheless, the investigated prenylquinols showed stronger increase in the membrane order than alpha-tocopherol or alpha-tocopherol acetate, which could be connected with binding of prenylquinol head groups to phospholipid molecules by hydrogen bonds. The strong ordering influence of ubiquinones on the membrane structure was attributed to methoxyl groups of the UQ quinone rings.
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Affiliation(s)
- M Skowronek
- Department of Plant Physiology and Biochemistry, The Jan Zurzycki Institute of Molecular Biology, Jagiellonian Univeristy, Kraków, Poland
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Kruk J, Strzałka K, Leblanc RM. Fluorescence properties of plastoquinol, ubiquinol and alpha-tocopherol quinol in solution and liposome membranes. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 1993; 19:33-8. [PMID: 8336241 DOI: 10.1016/1011-1344(93)80090-v] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
It was found that plastoquinol-9, ubiquinol-10 and alpha-tocopherol quinol show intrinsic fluorescence in organic solvents and in liposomes. Their fluorescence spectra in solution showed the presence of one emission band with maximum intensity in the range 319.0-327.0 nm for plastoquinol and 321.5-326.5 nm for alpha-tocopherol quinol, which is the longest wavelength shifted in polar solvents. The emission band at about 371 nm for ubiquinol was not sensitive to solvent polarity. For all three prenylquinones the fluorescence quantum efficiency changed significantly in solvents of different polarities, being the highest in ethanol and the lowest in hexane in the case of plastoquinol and alpha-tocopherol quinol, whereas ubiquinol fluorescence showed the opposite effect. These spectral parameters were applied to determination of prenylquinol localization in liposome membranes.
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Affiliation(s)
- J Kruk
- Department of Physiology and Biochemistry of Plants, Jan Zurzycki Institute of Molecular Biology, Jagiellonian University, Kraków, Poland
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