Hydrocarbon chain packing and the effect of ethanol on the thermotropic phase behavior of mixed-chain phosphatidylglycerols.
Hydrocarbon chain packing and the effect of ethanol on the thermotropic phase behavior of mixed-chain phosphatidylglycerols.
复制标题
烃链堆积和乙醇对混合链磷脂酰甘油热致相行为的影响。
DOI:
10.1016/s0005-2736(98)00242-9
复制
发表时间:
1999
期刊:
影响因子:
--
通讯作者:
Huang,CH
中科院分区:
文献类型:
--
作者:
Durvasula,RV;Huang,CH
Previous studies in this laboratory have delineated the relationship between the acyl chain asymmetry of mixed-chain phosphatidylcholines and the effect of ethanol concentration ([EtOH]) on their melting behavior (Li et al., Biophys J., 70 (1996) 2784–2794). This present investigation extends these findings to another phospholipid family by using high-resolution differential scanning calorimetry (DSC) to characterize the effect of ethanol concentration on the main phase transition temperature (Tm) of five molecular species of mixed-chain phosphatidylglycerol (PG). For C(14):C(18)PG, C(15):C(17)PG, C(16):C(16)PG, and C(17):C(15)PG, a biphasic profile in the Tmversus [EtOH] plot was observed, and the minimum in the plot for each PG occurred at 33, 15, 19, and 36 mg/ml, respectively. This biphasic behavior is typical of phospholipids whose acyl chain asymmetry is fairly small. For C(18):C(14)PG, only a linear decrease in the Tmwas observed as a function of ethanol concentration; this effect is characteristic of highly asymmetric phospholipids. Our DSC results obtained with mixed-chain PG in the presence of ethanol demonstrate that the acyl chain asymmetry of the five lipids studied can be ranked as follows: C(15):C(17)PG<C(16):C(16)PG<C(14):C(18)PG<C(17):C(15)PG<C(18):C(14)PG, confirming independent results from this laboratory that the overall acyl chain structure of PG in the hydrated gel phase is opposite to that detected in the single crystals. In fully hydrated bilayers, the acyl chain conformation of PG is most likely to be similar to that of phosphatidylcholine.
登录
查看更多内容
影响因子:
2.9
作者:
E. Findlay;P. G. Barton
通讯作者:
P. G. Barton
影响因子:
3.4
作者:
O. Bondar;E. Rowe
通讯作者:
E. Rowe
影响因子:
3.4
作者:
A. Joutti;O. Renkonen
通讯作者:
O. Renkonen
DOI:
--
发表时间:
1978
期刊:
Biochimica et Biophysica Acta
影响因子:
--
作者:
Joachim Seelig
通讯作者:
Joachim Seelig
DOI:
--
发表时间:
1993
期刊:
European Journal of Biochemistry
影响因子:
--
作者:
F. G. van der Goot;N. Didat;F. Pattus;W. Dowhan;L. Letellier
通讯作者:
L. Letellier