Structural Identification of Minor Phosphoinositol Lipids in Sulfolobus acidocaldarius N-8
1996 Volume 45 Issue 4 Pages 327-333
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1996 Volume 45 Issue 4 Pages 327-333
Examination was made of the dialkyl-diether-type (archaeol) and trialkyl-tetraethertype (caldarchaeol-trialkyl-type) lipids, low concentrated components of lipids from Sulfolobus acidocaldarius N-8. PL-X as intact dialkyl-diether-type lipid, and PL-Y and PL-Z as intact trialkyl-tetraethertype lipids were newly found. The structure of PL-X was a diether analog of phosphatidyl inositol, and both PL-Y and PL-Z were also phosphoinositol lipids, in the former, one inositol-monophosphate was linked to glycerol on one side of the core lipid, and in the latter, inositol-monophosphates were linked to glycerols on both sides of the core. There may possibly be a pathway in which tetraether type lipids are biosynthesized through PL-Y, following the production of PL-Z from two molecules of PL-X. PL-X content constituted about 5% the total lipids ; PL-Y and PL-Z were present as less than 1% total lipids in S. acidocaldarius N-8.
