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Showing 1 to 20 of 21 for “"Gluconobacter"”.
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Characterization of plasmids in Gluconobacter
The gluconobacters are well known for their plasma membrane-bound dehydrogenases that rapidly oxidize compounds and release the products into the medium. In 1989, Qazi et al. proposed that genes coding for membranebound glucose dehydrogenase are on a plasmid in G. oxydans strain ATCC 9937. The only …
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Heavy Metal Resistance in the Genus Gluconobacter
The genus Gluconobacter is industrially important due to the ability to accomplish unusual and almost complete oxidation reactions (bioconversions) and to contaminate high sugar content products. Following preliminary evidence that some strains of Gluconobacter were resistant to cadmium, and …
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Untersuchungen zur Physiologie des Essigsäurebakteriums Gluconobacter oxydans 621H
Gluconobacter oxydans 621H ist ein Gram-negatives alpha-Proteobakterium und zählt zur Familie der Acetobacteriaceae. Dieser strikt aerobe Organismus ist an substratreiche Habitate, z.B. Blütennektar oder Früchte, angepasst und wächst optimal bei 25 bis 30 °C und pH-Werten von 5,5 bis 6,0. Aufgrund …
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Diversity of limited oxidations accomplished by gluconobacter oxydans
<i>Gluconobacter oxydans</i> is characterized by the ability to carry out rapid, single-step oxidations of many different hydroxyl-containing compounds. These oxidations are believed to be catalyzed by the membrane-bound NAD(P)-independent dehydrogenases. Experiments were designed to use <i>G. …
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Function of limited sorbitol oxidation in Gluconobacter oxydans
Bacteria of the genus Gluconobacter have very active, membrane-bound, NAD(P)-independent, polyol dehydrogenases which stoichiometrically produce the singlestep oxidation product of polyols provided in the growth medium. These bacteria have a high respiratory quotient which is believed to result …
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The evolution of hydrogen sulfide by Gluconobacter species
… that members of the strictly aerobic genus Gluconobacter produce detectable quantities of hydrogen sulfide (H₂S) when incubated in SYP medium (5% sorbitol, 1% yeast extract, and 1% peptone) containing thiosulfate. This finding is puzzling, since the microbial evolution of H₂S is …
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Characterization of plasmids among the three species of Gluconobacter
The genus Gluconobacter consists of acetic acid bacteria which have the ability to generate acidic products from their substrates, particularly acetic acid from ethanol. For this reason, the gluconobacters live in acidic, sugary environments such as flowers, honey bees, fruits, cider, vinegar, wine …
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Auswirkungen der Deletion membranständiger Dehydrogenasen auf Gluconobacter oxydans DSM 7145
Essigsäurebakterien, im besonderen die Gattung Gluconobacter, sind in ihrer Fähigkeit verschiedenste Zucker, Zuckeralkohole und Polyole unvollständig zu oxidieren unübertroffen. Die für die Oxidation verantwortlichen Dehydrogenasen werden in zwei Gruppen, membranständige und cytoplasmatische …
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The initial characterization of GW6210, a newly isolated bacteriophage for Gluconobacter
The Gluconobacter phage GW6210, infects the ATCC strain 621 of G. oxydans. This phage possesses a polygonal head and contractile tail; therefore, it can be placed morphologically into Bradley's group A and tentatively placed in the virus family Myoviridae. This intensive electron microscopic study …
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Entschlüsselung des Genoms von Gluconobacter oxydans 621H - einem Bakterium von industriellem Interesse
Gluconobacter-Arten gehören, zusammen mit Vertretern der Gattungen Acetobacter und Gluconacetobacter, zu der Familie der Acetobacteriaceae. In der Regel oxidieren aerobe Mikroorganismen ihre Kohlenstoffquelle vollständig zu Kohlendioxid und Wasser. Bei diesem Abbauprozess werden sowohl Energie als …
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The Production of 2-Keto-L-Gulonic Acid by Different Gluconobacter Strains
… produced by the Reichstein method, which uses gluconobacters to oxidize sorbitol to sorbose then a chemical process to convert sorbose to 2-keto-L-gulonic acid (2-KLG). The establishment of a more extensive microbial process for 2-KLG production translates into a less expensive and more …
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The role of respiration-dependent proton translocation in the acid tolerance of Gluconobacter oxydans
Gluconobacter oxydans is characterized by extreme acid tolerance and the ability to carry out rapid, single-step polyol oxidation catalyzed by membrane bound ehydrogenases. Experiments were designed to determine whether acid tolerance is associated with rapid polyol oxidation in this organism. …
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The nature of sorbital (a primary) and sorbose (a secondary) dehydrogenases of Gluconobacter species
The genus <i>Gluconobacter</i> is known to carry out limited oxidations using the NAD(P)-independent membrane-bound dehydrogenases in which the products are released back to the medium. Reports of further limited oxidations of these primary oxidation products by <i>Gluconobacter</i> in single step …
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Factors affecting use of sorbitol as a carbon source by exponentially growing Gluconobacter oxydans ATCC 19357
Gluconobacters are known for their rapid oxidation of large quantities of sorbitol (SL) and quantitative conversion to sorbose (SE). Whether SL is assimilated into cell material has not been examined before and was investigated in this study. The effect of changing growth and oxidation rates on use …
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The Development of Genetic Tools for Protein Characterization and Genetic Engineering in the Acetic Acid Bacterium Gluconobacter Oxydans
The acetic acid bacterium Gluconobacter oxydans is well known for its ability to incompletely oxidize carbon substrates under normal conditions. The incomplete oxidations are carried out by membrane-bound dehydrogenases that channel electrons directly into the electron transport chain. Many of …
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Isolation and characterization of the (NAD(P)-independent)polyol dehydrogenase from the plasma-membranes of gluconobacter oxydans ATCC strain 621
Gluconobacter species rapidly perform limited oxidations of a large number of different polyhydroxy alcohols (polyols). These oxidations are catalyzed by constituitively synthesized plasma-membrane bound dehydrogenases. These bacteria would have to expend much energy to constituitively synthesize a …
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A nucleic acid homology study of the genus Azospirillum
… and Rhodospirillum rubrum (>65% RNA homology); Gluconobacter oxydans and Beijerinckia indica exhibited 30 to 60% RNA homology with Azospirillum species. Deoxyribonucleic acid (DNA) studies indicated that Conglomeromonas largomobilis subsp. largomobilis was related to Azospirillum lipoferum by …
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Pineapple Vinegar to Enhance Shelf Life of Carrot and Mango in Tanzania
… cereviciae, Acetobacter pasteurianus, and Gluconobacter oxydans. Levels of acetic acid were measured in the vinegar produced. High production (5.8%) of acetic acid was observed with pineapple juice concentrated to 130 Brix with the combination of Saccharomyces cerevisiae, A. pasteurianus …
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Designing and optimizing tandem bio- and chemo-catalyzed cascade reactions to access industrially relevant chemicals in mild, aqueous conditions
… aldehyde by the biocatalyst, whole cell Gluconobacter oxidans (G. oxidans), followed by an organocatalyzed aldol addition-condensation reaction to furnish the α,β-unsaturated aldehyde. This methodology was applied to a range C6-C10 products. We further show that the inclusion of an …
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