Results 121 to 130 of about 1,876 (158)
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Stability and proton-permeability of liposomes composed of archaeal tetraether lipids
Biochimica et Biophysica Acta (BBA) - Biomembranes, 1994Liposomes composed of tetraether lipids originating from the thermoacidophilic archaeon Sulfolobus acidocaldarius were analyzed for their stability and proton permeability from 20 degrees C up to 80 degrees C. At room temperature, these liposomes are considerably more stable and have a much lower proton permeability than liposomes composed of diester ...
Elferink, Marieke G.L. +3 more
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Total Synthesis of Archaeal 72-Membered Macrocyclic Tetraether Lipids
The Journal of Organic Chemistry, 1998Total synthesis of archaeal 72-membered macrocyclic tetraether lipids 3a and 3b is reported. The synthesis was principally composed of preparation of the functionalized half-sized diether compounds 11 and 15 first followed by appropriate dimerization through Julia coupling and final macrocyclization of the crucial dialdehydes 23 and 31 by McMurry ...
T. Eguchi, K. Ibaragi, K. Kakinuma
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Dynamics and Organization of Archaeal Tetraether Lipid Membranes
2017Archaeal bipolar tetraether lipids (BTLs) have distinct structural differences from the lipids isolated from bacteria and eukaryotes. Because of the presence of the unusual structural features, such as macrocyclic structures, cyclopentane rings, isoprenoid units, tetraether linkages, and a variety of polar head groups, archaeal BTL membranes possess ...
Parkson Lee-Gau Chong +2 more
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Calditol tetraether lipids of the archaebacterium Sulfolobus solfataricus. Biosynthetic studies.
The Biochemical journal, 1990Lipids from the archaebacterium Sulfolobus solfataricus are based on 72-membered macrocyclic tetraethers made up from two C40 diol units differently cyclized and either two glycerol moieties or one glycerol moiety and a unique branched-chain nonitol named calditol (glycerodialkylnonitol tetraethers, GDNTs). To elucidate the biosynthesis of calditol and
B Nicolaus +5 more
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Archaebacterial bipolar tetraether lipids: Physico-chemical and membrane properties
Chemistry and Physics of Lipids, 2010Bipolar tetraether lipids (BTL) are abundant in archaea and can be chemically synthesized. The structures of BTL are distinctly different from the lipids found in bacteria and eukaryotes. In aqueous solution, BTL can form extraordinarily stable liposomes with different sizes, lamellarities and membrane packing densities.
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Archives of Biochemistry and Biophysics, 1991
The main glycophospholipid from Thermoplasma acidophilum is composed of a diisopranol-2,3-glycerotetraether. The fraction of pentane cyclizations of its hydrocarbon chains increases with the growth temperature of the source organism (39-59 degrees C). Hydrated mixtures of these lipids together with cholesterol have been studied by calorimetry. With the
D, Blöcher, H J, Freisleben, K, Ring
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The main glycophospholipid from Thermoplasma acidophilum is composed of a diisopranol-2,3-glycerotetraether. The fraction of pentane cyclizations of its hydrocarbon chains increases with the growth temperature of the source organism (39-59 degrees C). Hydrated mixtures of these lipids together with cholesterol have been studied by calorimetry. With the
D, Blöcher, H J, Freisleben, K, Ring
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Constraints on the Biological Source(s) of the Orphan Branched Tetraether Membrane Lipids
Geomicrobiology Journal, 2009A soil profile from the Saxnäs Mosse peat bog, Sweden, has been analysed for glycerol dialkyl glycerol tetraether (GDGT) membrane lipids and 16S rRNA genes in order to constrain the source of the yet ‘orphan,’ but supposedly bacterial, branched GDGTs. Branched GDGT lipids dominate over archaeal membrane lipids.
Johan W.H. Weijers +7 more
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Selective interactions of concanavalin A‐modified tetraether lipid liposomes
physica status solidi c, 2011AbstractFor the development of site specific liposomes, high stability and long circulation properties are very promising for the improvement of drug targeting and drug delivery system as well as improvement of bioavailability of efficient bioactive drugs.
Aybike Ozcetin +4 more
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An unusual isoprenoid tetraether lipid in marine and lacustrine sediments
Organic Geochemistry, 2008Recent studies have shown that glycerol dialkyl glycerol tetraether (GDGT) lipids, thought be unique for (hyper)thermophilic archaea, are also present in non-thermophilic archaea and environments. In this study, an unusual H-shaped isoprenoid GDGT, in which the two biphytanyl carbon skeletons are covalently bound by a carbon-carbon bond, was ...
Schouten, Stefan +3 more
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Structure and permeability properties of biomimetic membranes of bolaform archaeal tetraether lipids
Journal of Membrane Science, 2002This review is a general survey of the properties of membranes formed by tetraether lipids extracted from microorganisms living in extreme conditions, named Archaea. After describing the unusual structure and physico-chemical properties of the membrane-spanning lipids, which allow Archaea to maintain membrane integrity in harsh environments, we ...
GLIOZZI, ALESSANDRA +2 more
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