Unsaturated fatty acid composition and biosynthesis in Oscillatoria limnetica and other cyanobacteria |
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| Authors: | Aharon Oren Ali Fattom Etana Padan Alisa Tietz |
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| Affiliation: | (1) Division of Microbial and Molecular Ecology, The Institute of Life Sciences, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel;(2) Department of Biochemistry, Tet-Aviv University, Tel-Aviv, Israel |
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| Abstract: | A number of cyanobacteria showing a high degree of adaptation to life under reduced oxygen tensions as witnessed by their potency of facultative anoxygenic CO2 photoassimilation with sulfide as electron donor were found to lack polyunsaturated fatty acids in their lipids. Lack of polyunsaturated fatty acids was found in representatives of different taxonomic groups. One of the strains lacking polyenoic acids was Oscillatoria limnetica, which can alternatively grow acrobically or anaerobically with sulfide as electron donor. This organism was found to synthesize monounsaturated fatty acids by desaturation of their saturated counterparts, in the presence as well as in the absence of molecular oxygen.Abbreviations ACP Acyl carrier protein - DCMU 3(3,4-dichlorophenyl)-1,1-dimethylurea |
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| Keywords: | Cyanobacteria Oscillatoria limnetica Polyunsaturated fatty acids Anoxygenic photosynthesis Anaerobic growth Hydrophobicity |
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