Results 161 to 170 of about 2,346 (185)
Some of the next articles are maybe not open access.
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
openaire +1 more source
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.
openaire +2 more sources
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
openaire +2 more sources
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
openaire +2 more sources
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
openaire +1 more source
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
openaire +2 more sources
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
openaire +4 more sources
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
openaire +1 more source
Lipids, 2005
AbstractMolecular dynamics simulations of an archaeal membrane made up of bipolar tetraether lipids and a dipalmitoylphosphatidylcholine (DPPC) lipid membrane were performed and compared for the first time. The simulated archaeal membrane consists of a pure monolayer of asymmetrical lipids, analogous to the main polar lipid [MPL; Swain, M., Brisson, J.‐
openaire +2 more sources
AbstractMolecular dynamics simulations of an archaeal membrane made up of bipolar tetraether lipids and a dipalmitoylphosphatidylcholine (DPPC) lipid membrane were performed and compared for the first time. The simulated archaeal membrane consists of a pure monolayer of asymmetrical lipids, analogous to the main polar lipid [MPL; Swain, M., Brisson, J.‐
openaire +2 more sources
Bulletin of the Chemical Society of Japan, 1997
Abstract Archaeal 72-membered macrocyclic tetraether model compounds (5 and 6) were synthesized by intramolecular dicarbonyl coupling with the aid of low-valent titanium, which is known as McMurry coupling. This synthetic methodology is the first practical way to obtain the two regioisomeric structures in quantity and appears to be ...
Tadashi EGUCHI +3 more
openaire +1 more source
Abstract Archaeal 72-membered macrocyclic tetraether model compounds (5 and 6) were synthesized by intramolecular dicarbonyl coupling with the aid of low-valent titanium, which is known as McMurry coupling. This synthetic methodology is the first practical way to obtain the two regioisomeric structures in quantity and appears to be ...
Tadashi EGUCHI +3 more
openaire +1 more source
Unusual Thermal Stability of Liposomes Made from Bipolar Tetraether Lipids
Biochemical and Biophysical Research Communications, 1994The thermal stability of liposomes made from polar lipids of Sulfolobus acidocaldarius, a thermoacidophilic archaebacterium, was studied. While two analogous nonarchaebacterial liposomes examined were unstable above 50 degrees C, liposomes made of the native tetraether lipids showed stability up to at least 80 degrees C.
openaire +2 more sources