Results 11 to 20 of about 1,225 (142)
Bacterial Oxidation of Arsenite III. Cell-Free Arsenite Dehydrogenase [PDF]
Australian Journal of Biological Sciences, 1954 A soluble, cell-free arsenite dehydrogenase is liberated from cells of strain 17 of the arsenite-oxidizing pseudomonad (Pseudomonas arsenoxydans-quinque) after grinding with powdered glass. The enzyme is moderately stable, retaining its activity for considerable periods on storage at· low temperatures.
J W, LEGGE, A W, TURNER
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Journal of Biological Chemistry, 2023 Arsenic contamination of groundwater is among one of the biggest health threats affecting millions of people in the world. There is an urgent need for efficient arsenic biosensors where the use of arsenic metabolizing enzymes can be explored. In this work, we have solved four crystal structures of arsenite oxidase (Aio) in complex with arsenic and ...
Filipa Engrola +7 more
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A periplasmic arsenite‐binding protein involved in regulating arsenite oxidation [PDF]
Environmental Microbiology, 2011 Summary Arsenic (As) is the most common toxic element in the environment, ranking first on the Superfund List of Hazardous Substances. Microbial redox transformations are the principal drivers of As chemical speciation, which in turn dictates As mobility and toxicity.
Guanghui, Liu +8 more
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Microbial oxidation of arsenite in a subarctic environment: diversity of arsenite oxidase genes and identification of a psychrotolerant arsenite oxidiser [PDF]
BMC Microbiology, 2010 AbstractBackgroundArsenic is toxic to most living cells. The two soluble inorganic forms of arsenic are arsenite (+3) and arsenate (+5), with arsenite the more toxic. Prokaryotic metabolism of arsenic has been reported in both thermal and moderate environments and has been shown to be involved in the redox cycling of arsenic.
Osborne, Thomas H. +6 more
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Cellular and Molecular Life Sciences, 2009 Arsenic is a metalloid which is toxic to living organisms. Natural occurrence of arsenic and human activities have led to widespread contamination in many areas of the world, exposing a large section of the human population to potential arsenic poisoning.
Ali, W. +3 more
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, 2023 On Christmas 1261 the Byzantine emperor Michael VIII Palaiologos had his eleven-year-old co-emperor John IV Laskaris blinded (thus losing the ability to claim the throne), exiled and imprisoned in Bithynia. This action led to Michael's excommunication by the patriarch Arsenios and, subsequently, to the Arsenite schism.
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Induction of Arsenite Tolerance and Thermotolerance by Arsenite Occur by Different Mechanisms
Environmental Health Perspectives, 1994 Both V79 and As/R28A cells (an arsenite-resistant Chinese hamster V79 cell variant) show increased resistance to toxic concentrations of arsenite after pretreatment with a nontoxic concentration. The induced tolerance can be completely inhibited by actinomycin D or cycloheximide.
Z, Wang, G, Hou, T G, Rossman
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Arsenite modifies structure of soil microbial communities and arsenite oxidization potential [PDF]
FEMS Microbiology Ecology, 2013 The influence of arsenite [As(III)] on natural microbial communities and the capacity of exposed communities to oxidize As(III) has not been well explored. In this study, we conducted soil column experiments with a natural microbial community exposed to different carbon conditions and a continuous flow of As(III).
Lami, Raphaël +6 more
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Molybdenum-Containing Arsenite Oxidase of the Chemolithoautotrophic Arsenite Oxidizer NT-26 [PDF]
Journal of Bacteriology, 2004 ABSTRACT The chemolithoautotroph NT-26 oxidizes arsenite to arsenate by using a periplasmic arsenite oxidase. Purification and preliminary characterization of the enzyme revealed that it (i) contains two heterologous subunits, AroA (98 kDa) and AroB (14 kDa); (ii) has a native molecular mass of 219 kDa, suggesting
Joanne M, Santini +1 more
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Food Chemistry International, EarlyView.ABSTRACT Rice (Oryza sativa L.) is a vital staple crop for nearly half the world's population. This study investigates the levels of aflatoxins (AFB1, AFB2, AFG1, and AFG2) and selected heavy metals (Cd, Pb, and Cr) and essential elements (Mn, Fe, Mg, Cu, and Zn) in rice varieties cultivated in Fogera, Amhara Region, Ethiopia.
Melese Tilahun +3 more
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