Acyl chain packing properties of deuterated lipid bilayer dispersions: Vibrational Raman spectral parameters

Acyl chain packing properties of deuterated lipid bilayer dispersions: Vibrational Raman spectral parameters
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氘化脂质双层分散体的酰基链堆积特性:振动拉曼光谱参数

DOI:
10.1002/jrs.1250210710
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发表时间:
1990
影响因子:
2.5
通讯作者:
I. W. Levin
I. W. Levin
中科院分区:
化学3区
文献类型:
--
作者:
M. Devlin;I. W. Levin

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阶段,由具有完全氘代链的脂质组成的模型膜系统的填充和动态行为通常通过位于λ 2100 cm-1处的亚甲基(CD 2)对称拉伸模式的线宽的温度依赖性来监测1-5引入并评估了分配给链CD亚甲基和甲基伸缩模式的光谱特征的高度强度比。特别是,具体的强度比反映了平均链间和链内的有序无序特性的部分的脂质链定位在甲基末端附近或附近的头部基团-酰基链界面的敏感性。这些强度参数的效用进行评估,通过检查的二元混合物的双层行为的二棕榈酰磷脂酰胆碱与完全氘代脂链(DPPC-d 62)和二棕榈酰磷脂酰胆碱与非氘代链(DPPC-do)在各种物理状态。我们还评估了使用强度参数澄清乙醇的影响间和链内的相互作用的DPPC-d 62双层。在DPPC-d 62-乙醇系统中,特别强调新型叉指链凝胶相的形成。
The phase, packing and dynamic behavior of model membrane systems consisting of lipids with completely deuterated chains is generally monitored by the temperature dependence of the line width of the methylene (CD2) symmetric stretching modes located at ∼2100 cm−1 1–5 Alternative empirical spectral parameters derived from the peak-height intensity ratios of spectral features assigned to the chain CD methylene and methyl stretching modes are introduced and evaluated. In particular, specific intensity ratios reflect a sensitivity to average inter- and intra-chain order–disorder properties of the portions of the lipid chains localized either near the methyl termini or near the head-group–acyl chain interface. The utility of these intensity parameters is evaluated by examining the bilayer behavior of binary mixtures of dipalmitoylphosphatidylcholine with fully deuterated lipid chains (DPPC-d62) and dipalmitoylphosphatidylcholine with non-deuterated chains (DPPC-do) in various physical states. We also assess the use of intensity parameters for clarifying the effects of ethanol on the inter- and intra-chain interactions of DPPC-d62 bilayers. In the DPPC-d62–ethanol system particular emphasis is placed on the formation of the novel interdigitated chain gel phase.
DOI: 10.1016/0005-2736(85)90248-2
发表时间: 1985
期刊: Biochimica et biophysica acta
影响因子: --
作者:
Rowe,ES
通讯作者: Rowe,ES
使用荧光团 1,6-二苯基-1,3,5-己三烯研究乙醇诱导的磷脂酰胆碱交错凝胶相。
DOI: 10.1021/bi00426a015
发表时间: 1988
期刊: Biochemistry
影响因子: 2.9
作者:
Nambi,P;Rowe,ES;McIntosh,TJ
通讯作者: McIntosh,TJ
DOI: 10.1016/0005-2736(84)90562-5
发表时间: 1984
期刊: Biochimica et biophysica acta
影响因子: --
作者:
Simon,SA;McIntosh,TJ
通讯作者: McIntosh,TJ