Nomenclature and taxonomy of halophilic archaea--comments on the proposal by DasSarma and DasSarma for nomenclatural changes within the order Halobacteriales.
(17/36)
Lipids of the ultra-thin square halophilic archaeon Haloquadratum walsbyi.
(18/36)
The lipid composition of the extremely halophilic archaeon Haloquadratum walsbyi was investigated by thin-layer chromatography and electrospray ionization-mass spectrometry. The analysis of neutral lipids showed the presence of vitamin MK-8, squalene, carotene, bacterioruberin and several retinal isomers. The major polar lipids were phosphatidylglycerophosphate methyl ester, phosphatidylglycerosulfate, phosphatidylglycerol and sulfated diglycosyl diether lipid. Among cardiolipins, the tetra-phytanyl or dimeric phospholipids, only traces of bisphosphatidylglycerol were detected. When the cells were exposed to hypotonic medium, no changes in the membrane lipid composition occurred. Distinguishing it from other extreme halophiles of the Halobacteriaceae family, the osmotic stress did not induce the neo-synthesis of cardiolipins in H. walsbyi. The difference may depend on the three-laminar structure of the cell wall, which differs significantly from that of other Haloarchaea. (+info)
Genome analysis of the anaerobic thermohalophilic bacterium Halothermothrix orenii.
(19/36)
The pathway of leucine to mevalonate in halophilic archaea: efficient incorporation of leucine into isoprenoidal lipid with the involvement of isovaleryl-CoA dehydrogenase in Halobacterium salinarum.
(20/36)
The pathway of leucine to mevalonate, which has attracted attention in the study of the biosynthesis of isoprenoid in parasitic protozoa and myxobacterium, was observed in the biosynthesis of the lipid core in halophilic archaea. The involvement of isovaleryl-CoA dehydrogenase was strongly suggested, with stereospecific conversion of the diastereotopic methyl group of leucine to isoprenoidal lipid. (+info)
A multilocus sequence analysis approach to the phylogeny and taxonomy of the Halobacteriales.
(21/36)
Phylogenetic diversities and community structure of members of the extremely halophilic Archaea (order Halobacteriales) in multiple saline sediment habitats.
(23/36)