Cubic liquid crystalline phase with phosphatidyl‐ethanolamine from Bacillus megaterium containing branched acyl chains

FEBS Letters

Khan, Ali²  Lindblom, Göran³  Rilfors, Leif⁴  Wieslander, Åke¹  Brentel, Ingvar³ 

[1] Department of Biochemistry, University of Umeå, S-901 87 Umeå, Sweden;Division of Physical Chemistry 2, Chemical Centre, University of Lund, S-220 07 Lund, Sweden;Division of Physical Chemistry, University of Umeå, S-901 87 Umeå, Sweden;Department of Microbiology, University of Lund, S-220 07 Lund, Sweden

关键词: Lipid polymorphism;    Cubic phase;    Phosphatidylethanolamine;    Branched acyl chain;    Bacillus megaterium;    NMR;   

DOI  :  10.1016/0014-5793(82)81120-4

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Phosphatidylethanolamine (PE) was isolated from membranes of Bacillus megaterium. The organism was grown at 20°C and 55°C. The phase equilibria in PE/water systems were studied by ²H and ³¹P nuclear magnetic resonance, and by polarized light microscopy. PE isolated from B. megaterium grown at 20°C forms a lamellar liquid crystalline phase at the growth temperature, and at low water contents a cubic liquid crystalline phase at 58°C. The ratio iso/ante-iso acyl chains was 0.3 in this lipid. PE isolated from this organism grown at 55°C forms only a lamellar liquid crystalline phase up to at least 65°C. In this lipid the ratio iso/ante-iso acyl chains was 3.2.

【 授权许可】

Unknown