Monitoring the pH Triggered Collapse of Liposomes in the Far IR Hydrogen Bonding Continuum.

Monitoring the pH Triggered Collapse of Liposomes in the Far IR Hydrogen Bonding Continuum.
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监测远红外氢键连续体中 pH 值引发的脂质体塌陷。

DOI:
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发表时间:
2016
影响因子:
3.3
通讯作者:
P. Hellwig
P. Hellwig
中科院分区:
化学3区
文献类型:
--
作者:
Batoul Srour;Birgit Erhard;R. Süss;P. Hellwig

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复杂分子结构如脂质膜或蛋白质的远红外光谱显示出大而宽的连续模式,包括组装结构的内部氢键的贡献。在这里,我们证实了pH触发的结构重排的pH敏感脂质体的远红外模式从170到159 cm(-1)的明确转变。这种光谱变化伴随着氢键特征展宽约25 cm(-1),并与中红外中脂头基ν(PO 2(-))(as)振动的熟知氢键依赖性位移以及官能团振动的进一步位移相关。因此,远红外光谱是一个有用的工具,在大分子结构的构象变化的调查。
Far infrared spectra of complex molecular structures like lipid membranes or proteins show large and broad continuum modes that include contributions of the internal hydrogen bonding of the assembled structures. Here we corroborate the pH triggered structural rearrangement in pH-sensitive liposomes with a clear shift of the far-infrared mode from 170 to 159 cm(-1). This spectral change was accompanied by the broadening of the hydrogen bonding signature by about 25 cm(-1) and correlates with the well-known hydrogen bonding dependent shifts of the ν(PO2(-))(as) vibration of the lipid headgroup in the mid infrared and with further shifts of functional group vibrations. Far infrared spectroscopy is thus a useful tool for the investigation of conformational changes in large molecular structures.
DOI: 10.1016/s0005-2736(97)00172-7
发表时间: 1998-02
期刊: Biochimica et biophysica acta
影响因子: --
作者:
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通讯作者: E. Liang;J. Hughes
DOI: 10.1021/ja9101826
发表时间: 2010-02-10
影响因子: 15
作者:
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DOI: 10.1088/0031-9155/47/21/318
发表时间: 2002-11-07
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