Metabolism Peculiarities of Bacteria of the Genus Sulfobacillus

Anna E. Zhuravleva; I.A. Tsaplina; A.D. Ismailov; L.M. Zakharchuk; G.I. Karavaiko

doi:10.4028/www.scientific.net/AMR.20-21.469

Paper Titles

Identification, Some Characterizations and Bioleaching Application of an Iron-Oxidizing Bacterium, Acidithiobacillus ferrooxidans KLipis-3-1 Isolated from Malaysia
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Quantification of Biomining Microorganisms Using Quantitative Real-Time Polymerase Chain Reaction
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Chalcopyrite and Bornite Differentially Affect Protein Synthesis in Planktonic Cells of Acidithiobacillus ferrooxidans
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Temperature Effects on the Iron Oxidation Kinetics of a Leptospirillum ferriphilum Dominated Culture at pH Below One
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Metabolism Peculiarities of Bacteria of the Genus Sulfobacillus
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Isolation, Characterization and Phylogenetic Analysis of Acidiphilium-Like Bacteria from Acid Mine Drainage
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Bacterial Oxidation of Elemental Sulfur: Changes in Oxidation Kinetics
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Quantification of Microorganisms Involved in Cemented Layer Formation in Sulfidic Mine Waste Tailings (Freiberg, Saxony, Germany)
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Analysis of the Microbial Community in the Leachate Collected from an Experimental Bioleaching Column by Cloning and RFLP
p.485

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Metabolism Peculiarities of Bacteria of the Genus Sulfobacillus

Abstract:

The genus Sulfobacillus includes moderately thermophilic and thermotolerant acidophilic bacteria, which prefer mixotrophic growth conditions. These organisms are S. thermosulfidooxidans 1269Т, S. sibiricus N1Т and S. thermotolerans Kr1Т. The simultaneous presence of organic (for example yeast extract) and inorganic energy sources is essential for optimal growth. Carbon sources are both CO2 and organic compounds. During their mixotrophic growth, the basic pathways of carbohydrate catabolism of sulfobacilli are those of glycolysis, oxidative pentose phosphate and Entner–Doudorov (excepting strain N1). Assimilation of CO2 is carried out both auto- and heterotrophically. Final stages of oxidation of organic substances serve for cell biosynthesis. Bacteria are able to switch to organo- and autotrophic metabolism. At that the enzyme activities of pentose phosphate pathway are not detected. The cycle of tricarboxylic acids is disrupted at the level of 2-oxoglutarate dehydrogenase. The glyoxylate bypass is absent. The maximal protein and ATP values and high intensity of respiration in S. thermosulfidooxidans, S. sibiricus and S. thermotolerans cultures were determined under mixotrophic conditions. Studied strains due to their flexible carbon and energetic metabolism together with other microorganisms of communities (leptospirilli and archaea) participate in sulfide minerals processing at 40-450C without organic compounds supplement.