Tetraether lipids of Methanospirillum hungatei with head groups consisting of phospho-N,N-dimethylaminopentanetetrol, phospho-N,N,N-trimethylaminopentanetetrol, and carbohydrates.
Acyclic, standard tetraether and diether lipids each account for about 50% of the total ether lipids found in Methanospirillum hungatei. Sixteen ether lipids were purified and defined according to relative weight percentage and staining reactions on thin-layer plates. Structures were elucidated for six previously uncharacterized tetraether lipids. Four of these lipids had as one head group either alpha-glcp-(1-2)-beta-gal(f)-, or beta-gal(f)-(1-6)-beta-gal(f)-, in glycosidic linkage to the first glycerol of the lipid backbone, and either a N,N-dimethyl-aminopentanetetrol or a N,N,N-trimethylaminopentanetetrol moiety in phosphodiester linkage to the second glycerol of the backbone. A fifth lipid was a tetraether structure novel in having carbohydrate moieties at both head group positions; namely alpha-glcp-(1-2)-gal(f)- and beta-gal(f)-. Two other lipids, a diether and a tetraether, had a single head group consisting of alpha-glcp-(1-2)-beta-gal(f)- modified by O-acetylation of the gal(f) residue at C-6. In addition to the seven new lipids described above, diether and tetraether analogs of phosphatidylglycerol were found.
Sprott
G D
GD
National Research Council of Canada, Institute for Biological Sciences, Ottawa, Ontario, Canada.
Ferrante
G
G
Ekiel
I
I
D002240:Carbohydrate Sequence; D019605:Euryarchaeota / Q000737:chemistry*; D005995:Glyceryl Ethers / Q000032:analysis*; D008055:Lipids / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D015394:Molecular Structure; D009943:Organophosphorus Compounds / Q000032:analysis*; D010715:Phosphatidylglycerols / Q000737:chemistry; D009626:Terminology as Topic
C089915:4-phospho-5-(N,N,N-trimethylamino)-1,2,3,4-pentanetetrol; C089916:4-phospho-5-(N,N-dimethylamino)-1,2,3,4-pentanetetrol; D005995:Glyceryl Ethers; D008055:Lipids; D009943:Organophosphorus Compounds; D010715:Phosphatidylglycerols