Lateral distribution of a pyrene-labeled phosphatidylcholine in phosphatidylcholine bilayers: fluorescence phase and modulation study.
Lateral distribution of a pyrene-labeled phosphatidylcholine in phosphatidylcholine bilayers: fluorescence phase and modulation study.
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磷脂酰胆碱双层中芘标记的磷脂酰胆碱的横向分布:荧光相位和调制研究。
DOI:
10.1021/bi00361a012
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发表时间:
1986
期刊:
影响因子:
2.9
通讯作者:
Thompson,TE
中科院分区:
文献类型:
--
作者:
Hresko,RC;Sugár,IP;Barenholz,Y;Thompson,TE
Department of Biochemistry, University of Virginia School of Medicine, Charlottesville, Virginia 22908 Received December 17, 1985; Revised Manuscript Received March 11, 1986 abstract: The lateral distribution of 1-palmitoyl-2-[10-(1-pyrenyl) decanoyl] phosphatidylcholine (PyrPC) was studied in smallunilamellar vesicles of 1, 2-dipalmitoyl-, 1, 2-dimyristoyl-, and 1-palmitoyl-2-oleoyl-phosphatidylcholine (DPPC, DMPC, and POPC, respectively) under anaerobic conditions. The DPPC and DMPC experiments were carried out over temperature ranges above and below the matrix phospholipid phase transition temperature (Tm). The excimer to monomer fluorescence intensity ratio (E/M) was determined as a function of temperature for the three PyrPC/lipid mixtures. Phase and modulation data were used to determine the temperature dependence of pyrene fluorescence rate parameters in gel and in liquid-crystalline bilayers. These parameters were then used to (1) provide information about excited-state fluorescence in phospholipid bilayers,(2) calculate the concentration of the probe within liquid-crystalline and gel domains in the phase transition region of PyrPC in DPPC, and (3) simulate E/M vs. temperature curves for three systems whosephase diagrams are different. From the simulated curves we could determine the relationship between the shape of the three simulated E/M vs. temperature curves and the lateral distribution of the probe. This information was then used to interpret the three experimentally derived E/M vs. temperature curves. Our results indicatethat PyrPC is randomly distributed in puregel and fluid phosphatidylcholine bilayers. In the phase transition region, PyrPC molecules preferentially distribute in fluid phases in DPPC but distribute almost equally between fluid and gel phases in DMPC. There is, however, no gel-phase immiscibility in these systems.
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DOI:
10.1073/pnas.75.6.2759
发表时间:
1978
影响因子:
11.1
作者:
B. Smith;H. Mcconnell
通讯作者:
H. Mcconnell
DOI:
10.1098/rspa.1964.0021
发表时间:
1964
期刊:
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
影响因子:
--
作者:
J. B. Birks;D. Dyson;T. King
通讯作者:
T. King
影响因子:
--
作者:
J. Lakowicz;H. Cherek;A. Balter
通讯作者:
A. Balter
影响因子:
3.4
作者:
J. R. Usher;R. Epand;D. Papahadjopoulos
通讯作者:
D. Papahadjopoulos
影响因子:
2.9
作者:
Enshinn Wu;Ken Jacobson;Demetrios Papahadjopoulos
通讯作者:
Demetrios Papahadjopoulos