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The Lipid Phase of Thylakoid and Cytoplasmic Membranes from the Blue-Green Algae (Cyanobacteria), Anacystis nidulans and Anabaena variabilis |
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| Authors: | Wada Hajime; Hirasawa Ryo; Omata Tatsuo; Murata Norio |
| Institution: | 1Department of Chemistry, College of Arts and Sciences, University of Tokyo Komaba, Meguro-ku, Tokyo 153, Japan 2Department of Biology, College of Arts and Sciences, University of Tokyo Komaba, Meguro-ku, Tokyo 153, Japan 3Laboratory of Chemistry, Faculty of Science and Technology, Tokyo Denki University Present address: Hatoyama, Hiki-gun, Saitama 350-03, Japan |
| Abstract: | The lipid phases of the thylakoid and cytoplasmic membranesfrom the blue-green alga, Anacystis nidulans, were studied bya spin-probe method using 2-(14-carboxytetradecyl)-2-ethyl-4,4-dimethyl-3-oxazolidinyloxyl.The thylakoid and cytoplasmic membranes of this alga were bothin the liquid crystalline state at growth temperature, and inthe phase separation state at about 0?C. The thylakoid membranesentered the phase separation state at a temperature higher thanthe cytoplasmic membranes. The lipid phase of the thylakoidmembranes from Anabaena variabilis was studied in a similarway, and these membranes were found also to undergo the phasetransition. The temperature for the onset of the phase separationand the fluidity of the membrane lipids of both algae dependedon the growth temperature of the culture. (Received April 9, 1984; Accepted June 1, 1984) |
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