Structures of minor ether lipids isolated from the aceticlastic methanogen, Methanothrix concilii GP6 |
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Authors: | G Ferrante J R Brisson G B Patel I Ekiel G D Sprott |
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Institution: | Division of Biological Sciences, National Research Council of Canada, Ottawa, Ontario. |
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Abstract: | Structures were determined for two phospholipids and three glycolipids purified from chloroform-methanol extracts of Methanothrix concilii GP6. Together they accounted for 14% of the total lipid and were based on a C20,20-diether core structure consisting of either 2,3-di-O-phytanyl-sn-glycerol or its 3'-hydroxy analog, namely, 2-O-3,7,11,15-tetramethylhexadecyl]-3-O-3'- hydroxy-3',7',11',15'-tetramethylhexadecyl]-sn-glycerol. These two core lipids formed phosphodiester bonds to ethanolamine and glycosidic bonds to beta-D-galactopyranose. A third glycolipid consisted of the triglycosyl head group beta-D-galactopyranosyl-(1----6)-beta-D-glucopyranosyl-(1----3)]-beta-D - galactopyranose in glycosidic linkage to the 3'-hydroxydiether core lipid. |
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