Selenite reduction by Shewanella oneidensis MR-1 is mediated by fumarate reductase in periplasm
Dao-Bo Li,Yuan Yuan Cheng,Chao Wu,Wen-Wei Li,Na Li,Zong Chuang Yang,Zhong Hua Tong,Han-Qing Yu +7 more
TL;DR: Findings reveal a previously unrecognized role of anaerobic respiration reductases of S. oneidensis MR-1 in selenite reduction and geochemical cycles of selenium in sediments and soils.
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Abstract: In situ reduction of selenite to elemental selenium (Se(0)), by microorganisms in sediments and soils is an important process and greatly affects the environmental distribution and the biological effects of selenium. However, the mechanism behind such a biological process remains unrevealed yet. Here we use Shewanella oneidensis MR-1, a widely-distributed dissimilatory metal-reducing bacterium with a powerful and diverse respiration capability, to evaluate the involvement of anaerobic respiration system in the microbial selenite reduction. With mutants analysis, we identify fumarate reductase FccA as the terminal reductase of selenite in periplasm. Moreover, we find that such a reduction is dependent on central respiration c-type cytochrome CymA. In contrast, nitrate reductase, nitrite reductase, and the Mtr electron transfer pathway do not work as selenite reductases. These findings reveal a previously unrecognized role of anaerobic respiration reductases of S. oneidensis MR-1 in selenite reduction and geochemical cycles of selenium in sediments and soils.
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Kirk-Othmer Encyclopedia of Chemical Technology数据库介绍及实例
TL;DR: The Third edition of the Kirk-Othmer encyclopedia of chemical technology as mentioned in this paper was published in 1989, with the title "Kirk's Encyclopedia of Chemical Technology: Chemical Technology".
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Selenium: environmental significance, pollution, and biological treatment technologies
TL;DR: There are still several challenges, particularly in achieving stringent discharge limits, the long-term stability of biogenic selenium and predicting the fate of bioreduced Selenium in the environment and biotechnological advances made in the treatment ofselenium contaminated wastewaters.
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Ecology and Biotechnology of Selenium-Respiring Bacteria
TL;DR: This review focuses on microorganisms that use selenate and selenite as terminal electron acceptors, in parallel to the well-studied sulfate-reducing bacteria, and overviews the significant advancements made in recent years on the role of SeRB in the biological selenium cycle.
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Selenium contamination, consequences and remediation techniques in water and soils: A review.
Yangzhuo He,Yujia Xiang,Yaoyu Zhou,Yuan Yang,Jiachao Zhang,Hongli Huang,Cui Shang,Lin Luo,Jun Gao,Lin Tang +9 more
TL;DR: Various treatment techniques for Se removal from water and soil are reviewed, and adsorption and membrane separation are seemed to be suitable on a commercial scale.
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References
Kirk-Othmer Encyclopedia of Chemical Technology数据库介绍及实例
TL;DR: The Third edition of the Kirk-Othmer encyclopedia of chemical technology as mentioned in this paper was published in 1989, with the title "Kirk's Encyclopedia of Chemical Technology: Chemical Technology".
4.4K
Shewanella secretes flavins that mediate extracellular electron transfer
Enrico Marsili,Daniel B. Baron,Indraneel D. Shikhare,Dan Coursolle,Jeffrey A. Gralnick,Daniel R. Bond +5 more
TL;DR: In situ demonstration of flavin production, and sequestration at surfaces, requires the paradigm of soluble redox shuttles in geochemistry to be adjusted to include binding and modification of surfaces.
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Dissimilatory Metal Reduction
TL;DR: Microorganisms can enzymatically reduce a variety of metals in metabolic processes that are not related to metal assimilation, including technetium, vanadium, molybdenum, gold, silver, and copper, but reduction of these metals has not been studied extensively.
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Towards environmental systems biology of Shewanella
James K. Fredrickson,Margaret F. Romine,Alexander S. Beliaev,Jennifer M. Auchtung,Michael E. Driscoll,Timothy S. Gardner,Kenneth H. Nealson,Andrei L. Osterman,Grigoriy E. Pinchuk,Jennifer L. Reed,Dmitry A. Rodionov,Jorge L. M. Rodrigues,Daad A. Saffarini,Margrethe H. Serres,Alfred M. Spormann,Igor B. Zhulin,James M. Tiedje +16 more
TL;DR: Systems-level analysis of the model species Shewanella oneidensis MR-1 and other members of this genus has provided new insights into the signal-transduction proteins, regulators, and metabolic and respiratory subsystems that govern the remarkable versatility of the shewanellae.
Genome sequence of the dissimilatory metal ion-reducing bacterium Shewanella oneidensis.
John F. Heidelberg,Ian T. Paulsen,Karen E. Nelson,Eric Gaidos,Eric Gaidos,William C. Nelson,Timothy D. Read,Jonathan A. Eisen,Rekha Seshadri,Naomi L. Ward,Barbara A. Methé,Rebecca A. Clayton,Terry E. Meyer,A. I. Tsapin,James Scott,Maureen J. Beanan,Lauren M. Brinkac,Sean C. Daugherty,Robert T. DeBoy,Robert J. Dodson,A. Scott Durkin,Daniel H. Haft,James F. Kolonay,Ramana Madupu,Jeremy Peterson,Lowell Umayam,Owen White,Alex M. Wolf,Jessica Vamathevan,Janice Weidman,Marjorie Impraim,K. Lee,Kristy Berry,Chris Lee,Jacob L. Mueller,Hoda Khouri,John Gill,T. Utterback,Lisa McDonald,Tamara Feldblyum,Hamilton O. Smith,J. Craig Venter,Kenneth H. Nealson,Kenneth H. Nealson,Claire M. Fraser +44 more
TL;DR: This genome sequence represents a critical step in the elucidation of the pathways for reduction (and bioremediation) of pollutants such as uranium (U) and chromium (Cr), and offers a starting point for defining this organism's complex electron transport systems and metal ion–reducing capabilities.