Abstract
The major ether-type lipid structures ofSulfolobus acidocaldarius (ATCC33909) were composed of caldarchaeol and calditoglycerocaldarchaeol. However, the characterization by nuclear magnetic resonance spectroscopy and mass spectrometry showed that the structure of calditol in calditoglycerocaldarchaeol is not nonitol, 2-(1′,2′,3′-trihydroxypropyl)1,2,3,4,5,6-hexahydroxyhexane, but 2-hydroxymethyl-1-(2,3-dihydroxypropoxy),2,3,4,5-cyclopentanetetraol with an ether linkage in the molecule. Such an intermolecular ether linkage was resistant, to BCl3 treatment, but nonresistant to 57% HI degradation treatment conducted at 100°C for 60 h, producting 2-hydroxymethyl-1,2,3,4,5-cyclopentanepentaol from calditol as reaction product. Further, it was confirmed that the structure of calditol is essentially a derivative of glycerol, and hydrocarbon chains were conjugated to the glycerol-like site in the structure. The calditol with an ether linkage in the molecule suggested an important role regarding the properties of heat-resistance and acid-resistance observed inSulfolobales.
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Abbreviations
- CI:
-
chemicals ionization
- DEPT:
-
distortionless enhancement polarization transfer
- DMSO:
-
dimethyl sulfoxide
- FAB-MS:
-
fast atom bombardment mass spectrometry
- GC/MS:
-
gas chromatography/mass spectrometry
- HMBC:
-
1H-Detected multiple-bond connectivity
- HPTLC:
-
high-performance thin-layer chromatography
- NBA:
-
3-nitrobenzylalcohol
- NMR:
-
nuclear magnetic resonance spectroscopy
- NOE:
-
nuclear Overhauser effect
- TLC:
-
thin-layer chromatography
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Sugai, A., Sakuma, R., Fukuda, I. et al. The structure of the core polyol of the ether lipids fromSulfolobus acidocaldarius . Lipids 30, 339–344 (1995). https://doi.org/10.1007/BF02536042
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DOI: https://doi.org/10.1007/BF02536042