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Journal of Lipid Research, Vol 30, 1601-1609, Copyright © 1989 by Lipid Research, Inc.

ARTICLES

Structures of minor ether lipids isolated from the aceticlastic methanogen, Methanothrix concilii GP6

G Ferrante, JR Brisson, GB Patel, I Ekiel and GD Sprott
Division of Biological Sciences, National Research Council of Canada, Ottawa, Ontario.

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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