古細菌エーテル脂質の多様性と系統関係

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タイトル別名
  • Structural Diversity of Archaeal Ether Lipid and Phylogenetic Relationship
  • コ サイキン エーテル シシツ ノ タヨウセイ ト ケイトウ カンケイ

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Ether lipid is one of the most distictive markers that discriminate Archaea and Bacteria. Among Archaea, there are diversity in their core lipid structure, phosphate-containing polar-head groups, and glycolipid-sugar moieties. For example, non-methaogenic thermophilic Archaea contain mainly tetraether type core and inositol as a sole phosphate-containing polar-head group, lipids of extreme halophiles are composed of only diether type core lipid and glycerophosphate and its derivatives as polar head groups, and all methanogens so far analyzed are characterized by the presence of nitrogen-containing polar groups. The diversity of lipids in Archaea is not random but is determined by a phylognetic relationship. Therefore qualitative lipid composition is used as a chemotaxonomic marker of extreme halophiles and methanogens. The most fundamental phenotypic marker that distinguishes Archaea and Bacteria, which is the highest taxonomic rank of living organisms, is the enantiomeric difference of glycerophosphate backbone structure of their polar lipids. It could be assumed that this difference has been kept since the time when organisms of the two domains had been differentiated.

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  • 日本油化学会誌

    日本油化学会誌 46 (5), 485-495,596, 1997

    公益社団法人 日本油化学会

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