Tetraether-linked membrane monolayers in Ferroplasma spp: a key to survival in acid

@article{Macalady2004TetraetherlinkedMM,
  title={Tetraether-linked membrane monolayers in Ferroplasma spp: a key to survival in acid},
  author={J. Macalady and M. Vestling and David J. Baumler and N. Boekelheide and C. Kaspar and J. Banfield},
  journal={Extremophiles},
  year={2004},
  volume={8},
  pages={411-419}
}
Ferroplasma acidarmanus thrives in hot, extremely low pH, metal-rich solutions associated with dissolving metal sulfide ore deposits. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and thin layer chromatography analyses of F. acidarmanus membranes indicate that tetraether lipids predominate, with at least three core lipid structures. NMR measurements indicate that the cytoplasmic pH of F. acidarmanus is ~5.6. The optimal growth pH is ~1.2, and the lowest growth pH… Expand
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References

SHOWING 1-10 OF 74 REFERENCES
[52] Lipids of Thermoplasma
Publisher Summary This chapter presents the procedures for the cultivation, isolation, and characterization of the diglyceryl tetraethers of Thermoplasma . Diglyceryl tetraethers are recovered fromExpand
Lipids of Thermococcus hydrothermalis, an archaea isolated from a deep-sea hydrothermal vent
TLDR
Analysis of the uninoculated culture medium indicates that fatty acid derivatives and some steroid and triterpenoid compounds identified in the lipidic extract of the archaea originated from the culture medium. Expand
Beta-D-glucopyranosyl caldarchaetidylglycerol is the main lipid of the acidophilic, mesophilic, ferrous iron-oxidising archaeon Ferroplasma acidiphilum.
TLDR
By means of matrix-assisted laser desorption ionisation mass spectrometry, infrared spectroscopy, and chemical degradation experiments it was established to be beta-D-glucopyranosyl caldarchaetidylglycerol, the isopranyl chains of which have a cyclopentane ring each. Expand
Novel, acid-labile, hydroxydiether lipid cores in methanogenic bacteria.
Polar ether lipids extracted from 15 methanogenic bacteria, representative of seven genera, were screened by nuclear magnetic resonance and thin layer chromatography for the presence of hydroxylExpand
Molecular modeling of archaebacterial bipolar tetraether lipid membranes.
TLDR
The biological implication of this study is that the cyclopentane ring could increase GDNT membrane thermal stability, which explains why the number of cyclopENTane rings in archaebacterial lipid increases with increasing growth temperature. Expand
Analysis of intact tetraether lipids in archaeal cell material and sediments by high performance liquid chromatography/atmospheric pressure chemical ionization mass spectrometry.
A method combining normal phase high performance liquid chromatography (HPLC) with positive ion atmospheric pressure chemical ionization mass spectrometry (APCI-MS) was developed for the analysis ofExpand
Pyrobaculum aerophilum sp. nov., a novel nitrate-reducing hyperthermophilic archaeum
A novel rod-shaped hyperthermophilic archaeum has been isolated from a boiling marine water hole at Maronti Beach, Ischia, Italy. It grew optimally at 100 degrees C and pH 7.0 by aerobic respirationExpand
The essence of being extremophilic: the role of the unique archaeal membrane lipids
TLDR
It is shown that thermophilic and extreme acidophilic Archaea possess membrane-spanning tetraether lipids that form a rigid monolayer membrane which is nearly impermeable to ions and protons, making the archaeal lipid membranes more suitable for life and survival in extreme environments than the ester-type bilayer lipids of Bacteria or Eukarya. Expand
Structural analysis by reductive cleavage with LiAlH4 of an allyl ether choline-phospholipid, archaetidylcholine, from the hyperthermophilic methanoarchaeon Methanopyrus kandleri.
TLDR
The validity of the LiAlH4 method for the structural analysis of allyl ether phospholipid in archaea was confirmed in a study of the model compound synthetic unsaturated archaetidic acid (2,3-di-O-geranylgeranyl-sn-glycerol-1-phosphate). Expand
Phenotypic Features of Ferroplasma acidiphilum Strains YT and Y-2
TLDR
It was established that the intraspecies phylogenetic divergence within F. acidiphilum is manifested in the two strains by different temperature optima against a background of similarity in other phenotypic properties. Expand
...
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2
3
4
5
...