Effect of unsaturation on the chain order of phosphatidylcholines in a dioleoylphosphatidylethanolamine matrix.

Effect of unsaturation on the chain order of phosphatidylcholines in a dioleoylphosphatidylethanolamine matrix.
复制标题

不饱和度对二油酰磷脂酰乙醇胺基质中磷脂酰胆碱链序的影响。

DOI:
10.1016/s0006-3495(96)79223-8
复制
发表时间:
1996
影响因子:
3.4
通讯作者:
K. Gawrisch
K. Gawrisch
中科院分区:
生物学3区
文献类型:
--
作者:
F. Separovic;K. Gawrisch

文献摘要

参考文献

被引文献

相似文献

用2H和31P核磁共振波谱研究了磷脂酰胆碱(PC)在双油酰磷脂酰乙醇胺(DOPE)基质中sn-1位含有18:0,18:1 omega 9,18:2 omega 6,18:3 omega 3,20:4 omega 6,20:5 omega 3或22:6 omega 3脂肪酸的性质。当掺杂/聚碳酸酯的摩尔比为5:1时,在40℃以下形成液晶层状相,在较高的温度下形成层片状、反六方(Hll)和立方相共存。与纯PC相比,DOPE基质中的PC的sn-1链明显更有序,对应于疏水双层厚度的增加约为1 A。我们观察到温度、不饱和度、头基和乙醇的变化导致碳氢链上下部的脂类顺序明显不同。非饱和度降低了链的有序性,主要是在碳氢链的较低三分之一。相反,随着温度的升高,掺杂矩阵引起的链序增加和有序度的降低在链的上三分之二处有一个恒定的大小,而在下三分之一处则较小。添加2M乙醇降低了有序参数,有效地逆转了由药物基质引起的链序增加。
The properties of phosphatidylcholines (PCs) having a perdeuterated stearic acid, 18:0d35, in the sn-1 position and the fatty acid 18:0, 18:1 omega 9, 18:2 omega 6, 18:3 omega 3, 20:4 omega 6, 20:5 omega 3, or 22:6 omega 3 at the sn-2 position were investigated in a matrix of dioleoylphosphatidylethanolamine (DOPE) by 2H and 31P NMR spectroscopy. At a mole ratio of DOPE/PC = 5:1, the lipids form liquid crystalline lamellar phases below 40 degrees C and coexisting lamellar, inverse hexagonal (Hll), and cubic phases at higher temperatures. The sn-1 chain of the PCs in a DOPE matrix is appreciably more ordered than in pure PCs, corresponding to an increase in the hydrophobic bilayer thickness of approximately 1 A. Distearoylphosphatidylcholine in the DOPE matrix has a higher sn-1 chain order than the unsaturated PCs. We observed distinct differences in the lipid order of upper and lower sections of the hydrocarbon chains caused by changes of temperature, unsaturation, headgroups, and ethanol. Unsaturation lowers chain order, mostly in the lower third of the hydrocarbon chains. By contrast, the increase in chain order caused by the DOPE matrix and the decrease in order with increasing temperature have a constant magnitude for the upper two-thirds of the chain and are smaller for the lower third. Addition of 2 M ethanol reduced order parameters, in effect reversing the increase in chain order caused by the DOPE matrix.
DOI: 10.1021/bi00503a010
发表时间: 1990
期刊: Biochemistry
影响因子: 2.9
作者:
Fenske,DB;Jarrell,HC;Guo,Y;Hui,SW
通讯作者: Hui,SW
DOI: 10.1016/s0006-3495(91)82203-2
发表时间: 1991
影响因子: 3.4
作者:
Thurmond,RL;Dodd,SW;Brown,MF
通讯作者: Brown,MF
DOI: 10.1016/0003-2697(90)90541-g
发表时间: 1990
影响因子: 2.9
作者:
Holte,LL;vanKuijk,FJ;Dratz,EA
通讯作者: Dratz,EA
DOI: 10.1021/bi00453a010
发表时间: 1990-01-09
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
RAND, RP;FULLER, NL;PARSEGIAN, VA
通讯作者: PARSEGIAN, VA
荧光二芘基脂质的分子内准分子动力学:2. DOPE/DOPC 膜。
DOI: 10.1016/s0006-3495(94)80553-3
发表时间: 1994
影响因子: 3.4
作者:
Cheng,KH;Ruymgaart,L;Liu,LI;Somerharju,P;Sugar,IP
通讯作者: Sugar,IP