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  • 1
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    Biogeochemistry: NO connection with methane (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-03-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oremland, Ronald S -- England -- Nature. 2010 Mar 25;464(7288):500-1. doi: 10.1038/464500a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20336129" target="_blank"〉PubMed〈/a〉
    Keywords: Anaerobiosis/physiology ; Genome, Bacterial/genetics ; Methane/*metabolism ; Methylococcaceae/enzymology/*metabolism ; Oxidation-Reduction ; Oxygen/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 2
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    Arsenic(III) fuels anoxygenic photosynthesis in hot spring biofilms from Mono Lake, California (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-08-16
    Description: Phylogenetic analysis indicates that microbial arsenic metabolism is ancient and probably extends back to the primordial Earth. In microbial biofilms growing on the rock surfaces of anoxic brine pools fed by hot springs containing arsenite and sulfide at high concentrations, we discovered light-dependent oxidation of arsenite [As(III)] to arsenate [As(V)] occurring under anoxic conditions. The communities were composed primarily of Ectothiorhodospira-like purple bacteria or Oscillatoria-like cyanobacteria. A pure culture of a photosynthetic bacterium grew as a photoautotroph when As(III) was used as the sole photosynthetic electron donor. The strain contained genes encoding a putative As(V) reductase but no detectable homologs of the As(III) oxidase genes of aerobic chemolithotrophs, suggesting a reverse functionality for the reductase. Production of As(V) by anoxygenic photosynthesis probably opened niches for primordial Earth's first As(V)-respiring prokaryotes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kulp, T R -- Hoeft, S E -- Asao, M -- Madigan, M T -- Hollibaugh, J T -- Fisher, J C -- Stolz, J F -- Culbertson, C W -- Miller, L G -- Oremland, R S -- New York, N.Y. -- Science. 2008 Aug 15;321(5891):967-70. doi: 10.1126/science.1160799.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉U.S. Geological Survey (USGS), Menlo Park, CA 94025, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18703741" target="_blank"〉PubMed〈/a〉
    Keywords: Anaerobiosis ; Arsenate Reductases/genetics/metabolism ; Arsenates/*metabolism ; Arsenites/*metabolism ; Autotrophic Processes ; Biofilms/*growth & development ; California ; Cyanobacteria/growth & development/isolation & purification/*metabolism ; Ectothiorhodospira/classification/growth & development/isolation & ; purification/*metabolism ; Hot Springs/*microbiology ; Light ; Molecular Sequence Data ; Oxidation-Reduction ; *Photosynthesis ; Sulfides/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    A bacterium that can grow by using arsenic instead of phosphorus (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-12-04
    Description: Life is mostly composed of the elements carbon, hydrogen, nitrogen, oxygen, sulfur, and phosphorus. Although these six elements make up nucleic acids, proteins, and lipids and thus the bulk of living matter, it is theoretically possible that some other elements in the periodic table could serve the same functions. Here, we describe a bacterium, strain GFAJ-1 of the Halomonadaceae, isolated from Mono Lake, California, that is able to substitute arsenic for phosphorus to sustain its growth. Our data show evidence for arsenate in macromolecules that normally contain phosphate, most notably nucleic acids and proteins. Exchange of one of the major bio-elements may have profound evolutionary and geochemical importance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wolfe-Simon, Felisa -- Switzer Blum, Jodi -- Kulp, Thomas R -- Gordon, Gwyneth W -- Hoeft, Shelley E -- Pett-Ridge, Jennifer -- Stolz, John F -- Webb, Samuel M -- Weber, Peter K -- Davies, Paul C W -- Anbar, Ariel D -- Oremland, Ronald S -- New York, N.Y. -- Science. 2011 Jun 3;332(6034):1163-6. doi: 10.1126/science.1197258. Epub 2010 Dec 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉NASA Astrobiology Institute, USA. felisawolfesimon@gmail.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21127214" target="_blank"〉PubMed〈/a〉
    Keywords: Arsenates/analysis/*metabolism ; Arsenic/analysis/chemistry/*metabolism ; Bacterial Proteins/analysis/metabolism ; California ; Culture Media ; DNA, Bacterial/*chemistry/metabolism ; Geologic Sediments/microbiology ; Halomonadaceae/cytology/*growth & development/isolation & ; purification/*metabolism ; Molecular Sequence Data ; Phosphates/analysis/*metabolism ; Phosphorus/analysis/chemistry/*metabolism ; Spectrometry, Mass, Secondary Ion ; Vacuoles/ultrastructure ; Water Microbiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    A microbial arsenic cycle in a salt-saturated, extreme environment (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-05-28
    Description: Searles Lake is a salt-saturated, alkaline brine unusually rich in the toxic element arsenic. Arsenic speciation changed from arsenate [As(V)] to arsenite [As(III)] with sediment depth. Incubated anoxic sediment slurries displayed dissimilatory As(V)-reductase activity that was markedly stimulated by H2 or sulfide, whereas aerobic slurries had rapid As(III)-oxidase activity. An anaerobic, extremely haloalkaliphilic bacterium was isolated from the sediment that grew via As(V) respiration, using either lactate or sulfide as its electron donor. Hence, a full biogeochemical cycle of arsenic occurs in Searles Lake, driven in part by inorganic electron donors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oremland, Ronald S -- Kulp, Thomas R -- Blum, Jodi Switzer -- Hoeft, Shelley E -- Baesman, Shaun -- Miller, Laurence G -- Stolz, John F -- New York, N.Y. -- Science. 2005 May 27;308(5726):1305-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉U.S. Geological Survey, ms 480, 345 Middlefield Road, Menlo Park, CA 94025, USA. roremlan@usgs.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15919992" target="_blank"〉PubMed〈/a〉
    Keywords: Aerobiosis ; Anaerobiosis ; Arsenates/*metabolism ; Arsenites/*metabolism ; Bacteria, Anaerobic/classification/growth & development/*isolation & ; purification/*metabolism ; Bicarbonates/metabolism ; California ; Ecosystem ; Electron Transport ; Genes, rRNA ; Geologic Sediments/*microbiology ; Hydrogen-Ion Concentration ; Lactic Acid/metabolism ; Molecular Sequence Data ; Oxidation-Reduction ; Phylogeny ; *Salts ; Sodium Chloride ; Sulfides/metabolism ; Water/chemistry ; *Water Microbiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    The ecology of arsenic (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-05-10
    Description: Arsenic is a metalloid whose name conjures up images of murder. Nonetheless, certain prokaryotes use arsenic oxyanions for energy generation, either by oxidizing arsenite or by respiring arsenate. These microbes are phylogenetically diverse and occur in a wide range of habitats. Arsenic cycling may take place in the absence of oxygen and can contribute to organic matter oxidation. In aquifers, these microbial reactions may mobilize arsenic from the solid to the aqueous phase, resulting in contaminated drinking water. Here we review what is known about arsenic-metabolizing bacteria and their potential impact on speciation and mobilization of arsenic in nature.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oremland, Ronald S -- Stolz, John F -- New York, N.Y. -- Science. 2003 May 9;300(5621):939-44.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉U.S. Geological Survey, Mailstop 480, 345 Middlefield Road, Menlo Park, CA 94025, USA. roremlan@usgs.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12738852" target="_blank"〉PubMed〈/a〉
    Keywords: Archaea/*metabolism ; Arsenates/metabolism ; Arsenic/*metabolism ; Arsenic Poisoning/etiology ; Arsenicals/*metabolism ; Arsenites/metabolism ; Bacteria/*metabolism ; Biomass ; Biotransformation ; Ecosystem ; Environmental Microbiology ; Humans ; Models, Biological ; Oxidation-Reduction ; Thermodynamics ; Water Pollutants, Chemical/metabolism ; Water Supply
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
    Electronic Resource
    Electronic Resource
    Bacillus arsenicoselenatis, sp. nov., and Bacillus selenitireducens, sp. nov.: two haloalkaliphiles from Mono Lake, California that respire oxyanions of selenium and arsenic (1998)
    Springer
    Archives of microbiology 171 (1998), S. 19-30 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two gram-positive anaerobic bacteria (strains E1H and MLS10) were isolated from the anoxic muds of Mono Lake, California, an alkaline, hypersaline, arsenic-rich water body. Both grew by dissimilatory reduction of As(V) to As(III) with the concomitant oxidation of lactate to acetate plus CO2. Bacillus arsenicoselenatis (strain E1H) is a spore-forming rod that also grew by dissimilatory reduction of Se(VI) to Se(IV). Bacillus selenitireducens (strain MLS10) is a short, non-spore-forming rod that grew by dissimilatory reduction of Se(IV) to Se(0). When the two isolates were cocultured, a complete reduction of Se(VI) to Se(0) was achieved. Both isolates are alkaliphiles and had optimal specific growth rates in the pH range of 8.5–10. Strain E1H had a salinity optimum at 60 g l–1 NaCl, while strain MLS10 had optimal growth at lower salinities (24–60 g l–1 NaCl). Both strains have limited abilities to grow with electron donors and acceptors other than those given above. Strain MLS10 demonstrated weak growth as a microaerophile and was also capable of fermentative growth on glucose, while strain E1H is a strict anaerobe. Comparative 16S rRNA gene sequence analysis placed the two isolates with other Bacillus spp. in the low G+C gram-positive group of bacteria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002030050673
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    The importance of methane and thiosulfate in the metabolism of the bacterial symbionts of two deep-sea mussels (1987)
    Springer
    Marine biology 96 (1987), S. 59-71 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Undescribed hydrocarbon-seep mussels were collected from the Louisiana Slope, Gulf of Mexico, during March 1986, and the ultrastructure of their gills was examined and compared to Bathymodiolus thermophilus, a mussel collected from the deep-sea hydrothermal vents on the Galápagos Rift in March 1985. These closely related mytilids both contain abundant symbiotic bacteria in their gills. However, the bacteria from the two species are distinctly different in both morphology and biochemistry, and are housed differently within the gills of the two mussels. The symbionts from the seep mussel are larger than the symbionts from B. thermophilus and, unlike the latter, contain stacked intracytoplasmic membranes. In the seep mussel three or fewer symbionts appear to be contained in each host-cell vacuole, while in B. thermophilus there are often more than twenty bacteria visible in a single section through a vacuole. The methanotrophic nature of the seep-mussel symbionts was confirmed in 14C-methane uptake experiments by the appearance of label in both CO2 and acid-stable, non-volatile, organic compounds after a 3 h incubation of isolated gill tissue. Furthermore, methane consumption was correlated with methanol dehydrogenase activity in isolated gill tissue. Activity of ribulose-1,5-biphosphate (RuBP) carboxylase and 14CO2 assimilation studies indicate the presence of either a second type of symbiont or contaminating bacteria on the gills of freshly captured seep mussels. A reevaluation of the nutrition of the symbionts in B. thermophilus indicates that while the major symbiont is not a methanotroph, its status as a sulfur-oxidizing chemoautotroph, as has been suggested previously, is far from proven.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00394838
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  • 8
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    Large carbon isotope fractionation associated with oxidation of methyl halides by methylotrophic bacteria (2001)
    National Academy of Sciences
    Details
    Publication Date: 2001-05-08
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 9
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    Bacillus arsenicoselenatis , sp. nov., and Bacillus selenitireducens , sp. nov.: two haloalkaliphiles from Mono Lake, California that respire oxyanions of selenium and arsenic (1998)
    Springer
    Details
    Publication Date: 1998-12-09
    Print ISSN: 0302-8933
    Electronic ISSN: 1432-072X
    Topics: Biology
    Published by Springer
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  • 10
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    Denitrification Associated with Stream Periphyton: Chamber Estimates from Undisrupted Communities (1984)
    Wiley
    Details
    Publication Date: 1984-10-01
    Print ISSN: 0047-2425
    Electronic ISSN: 1537-2537
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Wiley
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