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Showing 1 to 20 of 28 for “"Halobacterium"”.
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Aerotaxis in HALOBACTERIUM HALOBIUM
… was investigated in the archaebacterium <em>Halobacterium halobium.</em> A quantitative temporal assay for aerotaxis of <em>H. halobium</em> was developed using computer assisted motion analysis. Aerotaxis was most pronounced in early log phase cultures. Peak aerotaxis was found to coincide …
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Cation effects on the purple membrane of Halobacterium halobium
My more recent research shows that the binding of one divalent cation is directly related to the blue-to-purple transition of bacteriorhodopsin; whereas, four other divalent cation binding sites involving carboxyl groups on the bacteriorhodopsin surface do not directly affect the color change. The …
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Thermodynamic and kinetic studies of purple membrane from halobacterium halobium
… with the energy tranducing purple membrane from Halobacterium halobium. In the first experiment, we used flash photolysis to measure the effects of solvent viscosity on the kinetics of the purple membrane photocycle, and we analyzed the data in terms of a modified Kramers' theory. In the second …
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Röntgenographische und spektroskopische Charakterisierung der lichtgetriebenen Ionenpumpe Halorhodopsin aus Halobacterium salinarum
… Anionenpumpe Halorhodopsin (HR) aus Halobacterium salinarum vorgestellt. Aufbauend auf die 3-dimensionale Struktur von HR und von Bakteriorhodopsin (BR) wird ein Modell des Ionentransportes (Protonen und Halidionen) in archaealen Ionenpumpen entwickelt, welches die unterschiedliche …
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Strukturelle und funktionelle Untersuchungen an der lichtgetriebenen Anionenpumpe Halorhodopsin aus Halobacterium salinarum
Röntgenographische Untersuchung des L-Intermediats in Halorhodopsin
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Untersuchung der lipidvermittelten Kristallisation der Ionenpumpen Bakteriorhodopsin und Halorhodopsin aus Halobacterium Salinarum
… kristallinen Purpurmembran (PM) in Halobacterium salinarum untersucht. Mittels gerichteter Mutagenese wurden aromatische Gruppen (W12, Y64, W80) gegen andere Reste ausgetauscht und die mutierten Gene homolog exprimiert. Die Tryptophanmutationen hatten dabei eine drastische Störung …
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Structural Characterization of the Transfer Ribonucleic Acids From Halobacterium Volcanii and Other Archaebacteria
… patterns of the tRNAs of ten archaebacteria (Halobacterium volcanii, Halococcus morrhuae, Methanobacterium bryantii, Methanobrevibacter smithii, Methanococcus vannielii, Methanococcus voltae, Methanomicrobium mobile, Methanosarcina barkeri, Thermoplasma acidophilum, and Sulfolobus …
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Functional and time-resolved structural studies of bacteriorhodopsin mutants following expression in Halobacterium halobium
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1995.
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Isolation and characterization of new pterins from nonmethanogenic archaebacteria
… One of these halopterins is produced by Halobacterium salinarium, Halobacterium halobium, and Halococcus morrhuae and is called phosphohalopterin-1. It was given this name because it was the first halopterin discovered and it has four monophosphate esters per dimeric pterin. The proposed …
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Isolation of psychrophilic halophiles from the Antarctic polar desert
… positive rods and cocci. No filamentous fungi or Halobacterium spp. were observed on the media used. At 15 C there were no isolates from media containing greater than 15 percent added salt; however, counts of 1.4 x 10³ colonies per gram of soil were found at this concentration. As the incubation …
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Nuclear Magnetic Resonance Studies of Model and Biological Membranes
… into the membrane protein, bacteriorhodopsin, of Halobacterium halobium. Our results indicate that there are at least two motional classes of amino acids in bacteriorhodopsin. The first type are rigid and give rise to the broad powder pattern observed. These amino acids are "matrix" amino acids …
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Characterization and Inhibition of the Dimer Interface in Bacterial Small Multidrug Resistance Proteins
… drugs. We have used the SMR homologue Hsmr from Halobacterium salinarum to investigate the oligomerization properties of the protein family at TM helix 4. We produced point mutations along the length of the TM4 helix in the full length Hsmr protein and assayed their dimerization and functional …
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