Physicochemical Characterization of Tetraether Lipids from Thermoplasma acidophilum. II. Film Balance Studies on the Monomolecular Organization of the Main Glycophospholipid in Monofilms
Physicochemical Characterization of Tetraether Lipids from Thermoplasma acidophilum. II. Film Balance Studies on the Monomolecular Organization of the Main Glycophospholipid in Monofilms
复制标题
嗜酸热原体四醚脂质的物理化学表征。
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
K. Ring
中科院分区：
文献类型：
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作者：
C. Strobl;L. Six;K. Heckmann;B. Henkel;K. Ring
嗜酸热浆菌的双极性主四醚脂（MPL）在空气-水界面上形成典型的液体膨胀膜。压力下的极限分子面积约为Ac=73 Ω 2/分子。发现单极植烷基二醚脂质在高表面压力下占据与MPL相同的面积。因此，可以得出结论，在单膜中，MPL分子的两个极性头基中只有一个是水合的，即单个MPL分子直立取向。MPT的包装性能。在单膜中的极性仅由支链烷基链的性质决定;极性头部基团对膜中的空间需求没有贡献。MPL膜的膜压在8°C下约为39 mN m-1。在π = 30 mN m-1的表面压力和20 °C下，膜可稳定许多小时。
The bipolar main tetraether lipid (MPL) of Thermoplasma acidophilum has been shown to form typical liquid expanded films at the air-water interface. The limiting molecular area at the collaps pressure is approximately Ac=73 Å2 per molecule. Monopolar aiphytanyl diether lipids were found to occupy the same area at high surface pressure as MPL. Thus, it was concluded that in the monofilm only one of the two polar headgroups of the MPL molecules is hydrated, i.e. that the single MPL molecules arc oriented upright. The packing properties of MPT. in the monofilm are determined by the properties of the branched alkyl chains only; the polar head groups do not contribute to the space requirement in the film. The collaps pressure of the MPL film is approximately 39 mN m-1 at 8°C. At a surface pressure of π = 30 mN m-1 and 20 °C the film is stable for many hours.