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.
复制标题

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
复制
发表时间:
1986
期刊:
影响因子:
2.9
通讯作者:
Thompson,TE
Thompson,TE
中科院分区:
生物学3区
文献类型:
--
作者:
Hresko,RC;Sugár,IP;Barenholz,Y;Thompson,TE

文献摘要

参考文献

被引文献

相似文献

弗吉尼亚大学医学院生物化学系,夏洛茨维尔,弗吉尼亚州 22908 收稿日期:1985 年 12 月 17 日;修订稿于 1986 年 3 月 11 日收到 摘要:研究了 1, 2-二棕榈酰-, 1, 2-二肉豆蔻酰-, 和 1, 2-二肉豆蔻酰-, 1, 2-二肉豆蔻酰-, 和厌氧条件下的 1-棕榈酰-2-油酰-磷脂酰胆碱(分别为 DPPC、DMPC 和 POPC)。 DPPC 和 DMPC 实验在高于和低于基质磷脂相变温度 (Tm) 的温度范围内进行。确定三种 PyrPC/脂质混合物的准分子与单体荧光强度比 (E/M) 作为温度的函数。相位和调制数据用于确定凝胶和液晶双层中芘荧光速率参数的温度依赖性。然后,这些参数用于 (1) 提供有关磷脂双层中激发态荧光的信息,(2) 计算 DPPC 中 PyrPC 相变区域中液晶域和凝胶域中探针的浓度,以及 (3) 模拟相图不同的三个系统的 E/M 与温度曲线。从模拟曲线我们可以确定三个模拟E/M与温度曲线的形状与探头的横向分布之间的关系。然后使用该信息来解释三个实验得出的 E/M 与温度曲线。我们的结果表明 PyrPC 随机分布在纯凝胶和流体磷脂酰胆碱双层中。在相变区域,PyrPC 分子在 DPPC 中优先分布在流体相中,但在 DMPC 中几乎均匀地分布在流体相和凝胶相中。然而,这些系统中不存在凝胶相不混溶性。
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.
使用周期性模式光漂白测定膜中的分子运动。
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
“准分子”荧光 III. 1:2-苯并蒽衍生物在溶液中的寿命研究
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
相位调制荧光测定中使用的光电倍增管的计时误差的校正。
DOI: --
发表时间: 1981
影响因子: --
作者:
J. Lakowicz;H. Cherek;A. Balter
通讯作者: A. Balter
游离脂肪酸对二肉豆蔻酰甘油磷酸胆碱热致相变的影响。
DOI: --
发表时间: 1978
影响因子: 3.4
作者:
J. R. Usher;R. Epand;D. Papahadjopoulos
通讯作者: D. Papahadjopoulos
通过光漂白后的荧光恢复测量磷脂多层的横向扩散。
DOI: 10.1021/bi00636a034
发表时间: 1977
期刊: Biochemistry
影响因子: 2.9
作者:
Enshinn Wu;Ken Jacobson;Demetrios Papahadjopoulos
通讯作者: Demetrios Papahadjopoulos