Hasegawa Y, Kawada N, Nosoh Y
Arch Microbiol. 1980 Jun;126(2):103-8. doi: 10.1007/BF00511214.
Membranes from Bacillus caldotenax contain neutral lipids and phospholipids such as phosphatidyl-ethanolamine, phosphatidyl glycerol and cardiolipin. Each of the lipids has almost the same fatty acid composition. When the growth temperature decreases, not only the fatty acid composition but also the lipid composition changes such that the membrane fluidity increases, and the composition of membrane-bound proteins also changes. On shifting the growth temperature from 65 degrees to 45 degress C, the bacterium grows immediately with a doubling time at 45 degrees C, but the compositions of proteins and lipids in membranes gradually change and reach the compositions typical of cells growing at 45 degrees C one doubling time after the temperature shift, respectively. It is concluded that the change in chemical composition of membrane of the bacterium on the temperature shift from 65 degrees to 45 degrees C is not prerequisite for growth at 45 degrees C.
嗜热栖热芽孢杆菌的细胞膜含有中性脂质和磷脂，如磷脂酰乙醇胺、磷脂酰甘油和心磷脂。每种脂质的脂肪酸组成几乎相同。当生长温度降低时，不仅脂肪酸组成会发生变化，脂质组成也会改变，从而使膜流动性增加，膜结合蛋白的组成也会发生变化。将生长温度从65摄氏度转变为45摄氏度时，该细菌能立即在45摄氏度下生长，其倍增时间不变，但膜中蛋白质和脂质的组成会逐渐变化，并在温度转变后的一个倍增时间分别达到在45摄氏度下生长的细胞的典型组成。可以得出结论，该细菌在温度从65摄氏度转变为45摄氏度时细胞膜化学成分的变化并非其在45摄氏度下生长的先决条件。
