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ISMB 2006: Fortaleza, Brazil, August 6-10 Short Abstract: Acidithiobacillus ferrooxidans is a bacteria with economic relevance in metal bioleaching. Acidithiobacillus ferrooxidans is a Gram-negative bacterium with a high economic relevance due to its application in metal bioleaching. In addition, the characterization of the rib genes expression in A. ferrooxidans grown in the presence of the metal sulfides chalcopyrite and bornite could contribute to a better understanding of the bioleaching process by Acidithiobacillus ferrooxidans. ismb2006.cbi.cnptia.embrapa.br /tester/poster_abstract.php?id=H-76   (506 words)

acidithiobacillus (Acidithiobacillus) - Últimos artículos en medline Existence of aa3-type ubiquinol oxidase as a terminal oxidase in sulfite oxidation of Acidithiobacillus thiooxidans. Proteomic and bioinformatic analysis of iron- and sulfur-oxidizing Acidithiobacillus ferrooxidans using immobilized pH gradients and mass spectrometry. Electron transport pathways for the oxidation of endogenous substrate(s) in Acidithiobacillus ferrooxidans. www.galenicom.com /medline/term/Acidithiobacillus   (152 words)

Characterization of the petI and res Operons of Acidithiobacillus ferrooxidans -- Levicán et al. 184 (5): 1498 ... Characterization of the petI and res Operons of Acidithiobacillus ferrooxidans -- Levicán et al. Barreto, M., Jedlicki, E., Holmes, D. Identification of a Gene Cluster for the Formation of Extracellular Polysaccharide Precursors in the Chemolithoautotroph Acidithiobacillus ferrooxidans. Yarzabal, A., Appia-Ayme, C., Ratouchniak, J., Bonnefoy, V. Regulation of the expression of the Acidithiobacillus ferrooxidans rus operon encoding two cytochromes c, a cytochrome oxidase and rusticyanin. jb.asm.org /cgi/content/abstract/184/5/1498   (298 words)

Recovery of precious metal from sulphide minerals by bioleaching - Patent 6860919 Acidithiobacillus (formerly Thiobacillus); Acidimicrobium; Sulfobacillus; Ferroplasma (Ferriplasma); and Alicyclobacillus. Acidithiobacillus caldus (formerly Thiobacillus caldus); Acidimicrobium ferrooxidans; Sulfobacillus acidophilus; Sulfobacillus disulfidooxidans; Sulfobacillus thermosulfidooxidans; Ferroplasma acidarmanus; Thermoplasma acidophilum; and Alicyclobacillus acidocaldrius. Certain Acidithiobacillus strains, however, have been found to be tolerant to dissolved oxygen concentrations of up to 10.times.10.sup.-3 kg/m.sup.3. www.freepatentsonline.com /6860919.html   (7198 words)

Acidithiobacillus, metabolism To test for this possibility in Acidithiobacillus ferrooxidans, a microorganism with a high level of resistance to heavy metals, the polyphosphate levels were determined when the bacterium was grown in or shifted to the presence of a high copper concentration (100 mM). Differential protein expression during growth of Acidithiobacillus ferrooxidans on ferrous iron, sulfur compounds, or metal sulfides. A set of proteins that changed their levels of synthesis during growth of Acidithiobacillus ferrooxidans ATCC 19859 on metal sulfides, thiosulfate, elemental sulfur, and ferrous iron was characterized by using two-dimensional polyacrylamide gel electrophoresis. lib.bioinfo.pl /meid:1129   (1435 words)

ISMB 2006: Fortaleza, Brazil, August 6-10 Molecular modeling of enzymes involved in riboflavin biosynthesis could contribute to a better understanding of riboflavin biosynthesis when A. ferroxidans is maintained in the presence of metal sulfides. Very little is known about the rib genes from Acidithiobacillus ferrooxidans, a Gram-negative bacteria with a high economic relevance due to its application in metal bioleaching. The functional and structural analysis of these enzymes could provide relevant findings that could contribute to a better understanding of riboflavin biosynthesis when A. ferroxidans is maintained in the presence of metal sulfides. ismb2006.cbi.cnptia.embrapa.br /poster_abstract.php?id=I-90   (331 words)

JBMB Online [BSRK] Acidithiobacillus ferrooxidans is one of the most important bacterium used in bioleaching, and can utilize Fe or sulphide as energy source. The logarithmic phases were from 10 to 32 hours for Acidithiobacillus ferrooxidans cultivated with normal cultivating condition and from 20 to 60 hrs for Acidithiobacillus ferrooxidans cultivated phosphate starvation. From the 6 identified protein spots, 3 proteins were found to be decreased in expression at the cultivating condition of phosphate starvation, while another three upregulated. www.jbmb.or.kr /view_article.php3?cont=jbmb&kid=172&mid=6&pid=6   (223 words)

BioMed Central | Full text | Metabolic reconstruction of sulfur assimilation in the extremophile Acidithiobacillus ... Acidithiobacillus ferrooxidans is a gamma-proteobacterium that lives at pH2 and obtains energy by the oxidation of sulfur and iron. Acidithiobacillus ferrooxidans is a chemolithotrophic, mesophilic, gamma-proteobacterium that lives at pH2. It is found in mine drainage and coal wastes and other acidic environments and is used extensively as part of a consortium of microorganisms for the industrial recovery of metals, such as copper and gold [1]. bmc.ub.uni-potsdam.de /1471-2164-4-51/51.htm   (7033 words)

Acidithiobacillus Information Acidithiobacillus ferrooxidans lives in pyrite deposits, metabolizing iron and sulfur and producing sulfuric acid. Acidithiobacillus thiooxidans consumes sulfur and produces sulfuric acid. Kelly, D.P., and Wood, A.P. "Reclassification of some species of Thiobacillus to the newly designated genera Acidithiobacillus gen. nov., Halothiobacillus gen. nov. www.bookrags.com /wiki/Acidithiobacillus   (102 words)

Scientia Agricola - Biofertilzers with natural phosphate, sulphur and Acidithiobacillus in a siol with low available-P   (Site not responding. Last check: 2007-11-04) The content of available phosphorus in the assays for biofertilizers production in Petri dishes, collected in the different incubation periods showed liberation of P from biofertilizers, increasing three times the results of natural phosphate, and no differences were observed between the periods of incubation (Table 1). In the biofertilizers, the sulphur bacteria Acidithiobacillus elicits the reaction of sulphur with water and oxygen, forming higher amounts of sulphuric acid (Garcia Jr., 1992) at varying the rates, as related to the different amounts of elemental sulphur applied. In the first harvest the native bacteria present in soil were not effective in the oxidation of sulphur applied in the biofertilizer without Acidithiobacillus, thus it seems that 90 days after the first harvest the soil bacteria may produce sulphuric acid and could act in P solubilization increasing available P in soil. www.scielo.br /scielo.php?script=sci_arttext&pid=S0103-90162003000400024   (3535 words)

He, Z (Zhiguo) Acidithiobacillus ferrooxidans is one of the most important bacterium used in bioleaching, and can utilize Fe(2+) or sulphide as energy source. Differences of protein patterns of Acidithiobacillus ferrooxidans growing in case of normal or phosphate starvation were separately investigated after cultivation at 30(o)C by the analysis of two-dimensional gel electrophoresis (2-DE), matrix-assisted laser desorption/ionization (MALDI)-Mass spectrometry. In this study, we explored differential-expressed proteome of Acidithiobacillus ferrooxidans cultivated with Fe(2+) and elemental sulfur separately by adopting the protein biochip SELDI approach. lib.bioinfo.pl /auid:5170349   (636 words)

Minerals Engineering International Online - Biotechnology: Refereed Papers Vera, N. Guiliani, C.A. Jerez, Proteomic and genomic analysis of the phosphate starvation response of Acidithiobacillus ferrooxidans. Foucher, F. Battaglia-Brunet, P. d'Hugues, M. Clarens, J.J. Godon, D. Morin, Evolution of the bacterial population during the batch bioleaching of a cobaltiferous pyrite in a suspended-solids bubble column and comparison with a mechanically agitated reactor. Falco, C. Pogliani, G. Curutchet, E. Donati, A comparison of bioleaching of covellite using pure cultures of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans or a mixed culture of Leptospirillum ferrooxidans and Acidithiobacillus thiooxidans. www.min-eng.com /biotechnology/refs/2003.html   (1560 words)

Surface chemical studies on ‘Acidithiobacillus’ group of bacteria with reference to mineral ... Natarajan, KA and Das, A (2003) Surface chemical studies on ‘Acidithiobacillus’ group of bacteria with reference to mineral flocculation. ‘Acidithiobacillus’, group of microorganisms, play a significant role in acid generation from sulfide-bearing tailings through microbial oxidation of associated pyrite and other sulfide minerals. In this paper, the role of some Acidithiobacillus group of bacteria such as Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans in the removal of pyrite, chalcopyrite and sulfur from tailing substrates such as quartz is discussed. eprints.iisc.ernet.in /archive/00006747   (233 words)

Acidithiobacillus ¤ Acidithiobacillus thiooxidans (Waksman and Joffe 1922) Kelly and Wood 2000. 1988 to the genus Acidithiobacillus Kelly and Wood 2000 is tentative, as its 16S rRNA sequence does not appear to be available yet. The information on this page may not be reproduced, republished or mirrored on another webpage or website. www.bacterio.cict.fr /bacterio/a/acidithiobacillus.html   (527 words)

Mycorrhiza Literature Exchange   (Site not responding. Last check: 2007-11-04) To evaluate the effect of sulphur inoculated with Acidithiobacillus on the available P in rock phosphate and addition of various forms of organic matter, a greenhouse experiment using a Brazilian tableland soil was conducted. Rock phosphate pelleted with S inoculated with Acidithiobacillus plus Fibrasil produced the biggest plants and the highest N and P uptake. Rock phosphate with S and Acidithiobacillus increased available P and reduced soil pH, especially combined with Fibrasil residue, with no inhibitory effect on plant growth. mycorrhiza.ag.utk.edu /latest/latest05/05_8stamf1.htm   (288 words)

details Conversion of an obligate autotrophic bacteria to heterotrophic growth: expression of a heterogeneous phosphofructokinase gene in the chemolithotroph Acidithiobacillus thiooxidans. A plasmid pSDK-1 containing the Escherichia coli phosphofructokinase-1 gene (pfkA) was constructed, and transferred into Acidithiobacillus thiooxidans Tt-7 by conjugation. The pfkA gene from E. coli could be expressed in this obligately autotrophic bacterium but the enzyme activity (18 U g-1) was lower than that in E. coli (K12: 86 U g-1; DF1010 carrying plasmid pSDK-1: 97 U g-1). cmbi.bjmu.edu.cn /ChinaPaper/details.asp?PubMedID=12882002   (119 words)

Phylogenetic heterogeneity of the species Acidithiobacillus ferrooxidans -- Karavaiko et al. 53 (1): 113 -- ... Unrooted phylogenetic tree of various representatives of the genus Acidithiobacillus showing the position of the A. Kelly, D. and Wood, A. Reclassification of some species of Thiobacillus to the newly designated genera Acidithiobacillus gen. nov., Halothiobacillus gen. nov. The HiPIP from the acidophilic Acidithiobacillus ferrooxidans is correctly processed and translocated in Escherichia coli, in spite of the periplasm pH difference between these two micro-organisms ijs.sgmjournals.org /cgi/content/full/53/1/113   (3443 words)

Differential Protein Expression during Growth of Acidithiobacillus ferrooxidans on Ferrous Iron, Sulfur Compounds, or ... Differential Protein Expression during Growth of Acidithiobacillus ferrooxidans on Ferrous Iron, Sulfur Compounds, or Metal Sulfides -- Ramírez et al. Proteomic and genomic analysis of the phosphate starvation response of Acidithiobacillus ferrooxidans. The high-molecular-weight cytochrome c Cyc2 of Acidithiobacillus ferrooxidans is an outer membrane protein. aem.asm.org /cgi/content/full/70/8/4491   (4424 words)

Microbial Cell Factories | Full text | Characteristics and adaptability of iron- and sulfur-oxidizing microorganisms ... The role of the microorganisms in the solubilization of metal sulfides is, therefore, to provide sulfuric acid (reaction 5) for a proton attack and to keep the iron in the oxidized ferric state (reaction 6) for an oxidative attack on the mineral. These are the iron- and sulfur-oxidizing Acidithiobacillus ferrooxidans (previously Thiobacillus ferrooxidans), the sulfur-oxidizing Acidithiobacillus thiooxidans (previously Thiobacillus thiooxidans) and Acidithiobacillus caldus (previously Thiobacillus caldus), and the iron-oxidizing leptospirilli, Leptospirillum ferrooxidans and Leptospirillum ferriphilum [18,29,32,34,94]. Bacteria such as the acidothiobacilli and leptospirilli, fix CO by the Calvin reductive pentose phosphate cycle, using the enzyme ribulose 1,5-biphosphate carboxylase (RuBPCase or Rubisco) [92]. www.microbialcellfactories.com /content/4/1/13   (9941 words)

Microbial Ecology of an Extreme Acidic Environment, the Tinto River -- González-Toril et al. 69 (8): 4853 -- ... The tree is based in a parsimony analysis that includes only complete or almost-complete sequences of representative bacteria (38). Acidithiobacillus ferrooxidans sequences grouped into four clusters: a, b, c, and d. Sequences retrieved from DGGE bands are designated by the letter B followed by the number of the band. aem.asm.org /cgi/content/full/69/8/4853   (5606 words)

Removal of hydrogen sulfide by sulfate-resistant Acidithiobacillus thiooxidans AZ11. Here, we examined the effects of factors such as inlet concentration and space velocity on the removal efficiency of a bacterial strain capable of tolerating high sulfate concentrations and low pH conditions. We examined three strains of Acidithiobacillus thiooxidans known to have sulfur-oxidizing activity, and identified strain AZ11 as having the highest tolerance for sulfate. acidithiobacillus thiooxidans, Azufre, biodegradation, environmental, Biorreactores, Ceramica, Concentración de Iones de Hidrogeno, Dioxido de Azufre, Factores de Tiempo, Medios de Cultivo, Oxigeno, Sulfuro de Hidrogeno www.galenicom.com /?ac=viewArticleMXPrint&idpm=16716938   (413 words)

Directory of open access journals   (Site not responding. Last check: 2007-11-04) A greenhouse experiment was carried out to evaluate the effect of the biofertilizers in a soil with low available P (Typic Fragiudult) from the "Zona da Mata" of Pernambuco State, grown with yam bean (Pachyrhizus erosus) in two consecutive harvests. The treatments were: Natural Phosphate (NP); biofertilizers produced in laboratory (B5, B10, B15, B20) with sulphur and Acidithiobacillus (NP+S*); natural phosphate with sulphur (20%) without Acidithiobacillus (NP+S); triple super phosphate (TSP) and a control without phosphorus. After the two harvests soil presented lower pH values and higher rates of available P when the biofertilizers B15 and B20 with sulphur and Acidithiobacillus were applied. www.doaj.org /doaj?func=abstract&id=35583&recNo=24&toc=1   (312 words)

Surface Chemical Studies on 'Acidithiobacillus' Group of Bacteria with Reference to Mineral Flocculation, ... Abstract: Acidithiobacillus microorganisms play a significant role in acid generation from sulfide-bearing tailings through microbial oxidation of associated pyrite and other sulfide minerals. This paper examines the role of some Acidithiobacillus bacteria such as A. A study of the dispersion and flocculation behavior of the minerals before and after interaction with the microorganisms achieved separation of sulfides from quartz through selective flocculation/dispersion with prior biotreatment. www.epa.gov /aml/tech/news/acidith.htm   (197 words)

[No title] The most prominent bacteria which catalyse the oxidation of inorganic sulfur compounds under acidic conditions (pH 1–3) and ambient temperatures (up to 45 °C) are Acidithiobacillus and Acidiphilium spp. A characteristic among representatives of both genera is the ability to grow chemolithoautotrophically with sulfide, elemental sulfur, thiosulfate or polythionates (Hiraishi et al, 1998; Kelly and Wood, 2000; Parker and Prisk, 1953; Pronk et al., 1990). Among these bacteria are Acidithiobacillus thiooxidans, Acidithiobacillus caldus and Acidiphilium acidophilum which can thrive chemolithotrophically only by sulfur compound oxidation. lycos.cs.cmu.edu /info/sulfur--water.html?page=2   (508 words)

Water Science & Technology 43:6 (2001) 159-167 - T Gehrke et al. - The EPS of Acidithiobacillus ferrooxidans - a model ... The EPS of Acidithiobacillus ferrooxidans - a model for structure-function relationships of attached bacteria and their physiology To dissolve pyrite or sulphur, leaching bacteria like Acidithiobacillus ferrooxidans attach to these substrata by extracellular polymeric substances (specifically, lipopolysaccharides). The primary attachment to pyrite at pH 2 is mediated by exopolymer-complexed iron(III) ions in an electrostatic interaction with the negatively charged pyrite surface. www.iwaponline.com /wst/04306/wst043060159.htm   (266 words)

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