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Страница 1 од 50 резултати
Folding of malate dehydrogenase inside the GroEL-GroES cavity.
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The chaperonin GroEL binds nonnative substrate protein in the hydrophobic central cavity of an open ring. ATP and GroES binding to the same ring converts this cavity into an encapsulated, hydrophilic chamber that mediates productive folding. A 'rack' mechanism of initial protein unfolding proposes
Long-range effects in anion-π interactions: their crucial role in the inhibition mechanism of Mycobacterium tuberculosis malate synthase.
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The glyoxylate shunt is an anaplerotic bypass of the traditional Krebs cycle. It plays a prominent role in Mycobacterium tuberculosis virulence, so it can be exploited for the development of antitubercular therapeutics. The shunt involves two enzymes: isocitrate lyase (ICL) and malate synthase
Sulfurospirillum cavolei sp. nov., a facultatively anaerobic sulfur-reducing bacterium isolated from an underground crude oil storage cavity.
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A novel facultatively anaerobic sulfur-reducing bacterium, designated strain Phe91(T), was isolated from petroleum-contaminated groundwater in an underground crude oil storage cavity at Kuji in Iwate, Japan. Cells of strain Phe91(T) were slightly curved rods with single polar flagella. Optimum
Methylene green electrodeposited on SWNTs-based "bucky" papers for NADH and l-malate oxidation.
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This research introduces a cavity anode design based on new single-walled nanotube (SWNTs) papers, "bucky" papers, used for the oxidation (and regeneration) of nicotinamide adenine dinucleotide (NADH) and the oxidation of l-malate. The materials designed are paper-like processed composites
Chiral imidazolium receptors for citrate and malate: the importance of the preorganization.
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A family of simple receptors formed by two or three cationic imidazolium arms attached to a central aromatic linkage and displaying different conformational flexibility has been synthesized from the enantiopure (1S,2S)-2-(1-H-imidazol-1-yl)-cyclohexanol. The crystal structures of the corresponding
Porphyromonas loveana sp. nov., isolated from the oral cavity of Australian marsupials.
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An obligatory anaerobic, Gram-stain-negative coccobacillus with black-pigmented colonies was isolated from the oral cavity of selected Australian marsupial species. Phenotypic and molecular criteria showed that this bacterium was a distinct species within the genus Porphyromonas, and was closely
Refolding, characterization and crystal structure of (S)-malate dehydrogenase from the hyperthermophilic archaeon Aeropyrum pernix.
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Tartrate oxidation activity was found in the crude extract of an aerobic hyperthermophilic archaeon Aeropyrum pernix, and the enzyme was identified as (S)-malate dehydrogenase (MDH), which, when produced in Escherichia coli, was mainly obtained as an inactive inclusion body. The inclusion body was
Perturbed ATPase activity and not "close confinement" of substrate in the cis cavity affects rates of folding by tail-multiplied GroEL.
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Folding of substrate proteins inside the sequestered and hydrophilic GroEL-GroES cis cavity favors production of the native state. Recent studies of GroEL molecules containing volume-occupying multiplications of the flexible C-terminal tail segments have been interpreted to indicate that close
Brucine salts of L-alpha-hydroxy acids: brucinium hydrogen (S)-malate pentahydrate and anhydrous brucinium hydrogen (2R,3R)-tartrate at 130 K.
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The structures of two brucinium (2,3-dimethoxy-10-oxostrychnidinium) salts of the alpha-hydroxy acids L-malic acid and L-tartaric acid, namely brucinium hydrogen (S)-malate pentahydrate, C23H27N2O4+.C4H5O5-.5H2O, (I), and anhydrous brucinium hydrogen (2R,3R)-tartrate, C23H27N2O4+.C4H5O6-,(II), have
Halophilic adaptation: novel solvent protein interactions observed in the 2.9 and 2.6 A resolution structures of the wild type and a mutant of malate dehydrogenase from Haloarcula marismortui.
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Previous biophysical studies of tetrameric malate dehydrogenase from the halophilic archaeon Haloarcula marismortui (Hm MalDH) have revealed the importance of protein-solvent interactions for its adaptation to molar salt conditions that strongly affect protein solubility, stability, and activity, in
[Activities of certain krebs cycle dehydrogenases and the content of ATP in oral cavity mucosa in experimental stomatitis in dogs].
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In experiments with dogs stomatitis was simulated by ligation and section of the common biliary duct. On the third and fifth days in the oral cavity mucosa of the animals there occur essential changes in the energy producing reactions, which are controlled by pyruvate dehydrogenase NAD-dependent
Vesicocutaneous fistula formation during treatment with sunitinib malate: Case report.
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BACKGROUND
The oral multi-kinase inhibitor sunitinib malate improves the survival of patients with gastrointestinal stromal tumors (GIST) after the disease progresses or intolerance to imatinib mesylate develops. Urinary fistulae arising during treatment with sunitinib for GIST have not been
Structural analyses of a malate dehydrogenase with a variable active site.
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Malate dehydrogenase specifically oxidizes malate to oxaloacetate. The specificity arises from three arginines in the active site pocket that coordinate the carboxyl groups of the substrate and stabilize the newly forming hydroxyl/keto group during catalysis. Here, the role of Arg-153 in
Crystal structure of Escherichia coli malate dehydrogenase. A complex of the apoenzyme and citrate at 1.87 A resolution.
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The crystal structure of malate dehydrogenase from Escherichia coli has been determined with a resulting R-factor of 0.187 for X-ray data from 8.0 to 1.87 A. Molecular replacement, using the partially refined structure of porcine mitochondrial malate dehydrogenase as a probe, provided initial
Hydrophilic residues 526 KNDAAD 531 in the flexible C-terminal region of the chaperonin GroEL are critical for substrate protein folding within the central cavity.
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The final 23 residues in the C-terminal region of Escherichia coli GroEL are invisible in crystallographic analyses due to high flexibility. To probe the functional role of these residues in the chaperonin mechanism, we generated and characterized C-terminal truncated, double ring, and single ring
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