Results 21 to 30 of about 11,566 (244)

Bacterial nitrate assimilation: gene distribution and regulation [PDF]

, 2011
In the context of the global nitrogen cycle, the importance of inorganic nitrate for the nutrition and growth of marine and freshwater autotrophic phytoplankton has long been recognized.
Andrew J. Gates, Assumpção, Caballero, Cabello, Chai, Chen, Conrado Moreno-Vivián, David J. Richardson, Flores, Forchhammer, Forchhammer, Gates, Gutierrez, Ishida, Kayumov, Koropatkin, Leigh, Li, Lin, Lledó, Llácer, M. Dolores Roldán, Moreno-Vivián, Nakano, Ogawa, Ohashi, Pawlowski, Paz-Yepes, Pino, Puerta-Fernández, Ramos, Richardson, Sanders, Shao, Shu, Shu, Stuart J. Ferguson, Swanson, Szeto, Toukdarian, Víctor M. Luque-Almagro, Weiss, Weiss, Wray, Wu   +44 more
core   +1 more source

Siroheme synthase orients substrates for dehydrogenase and chelatase activities in a common active site

Nature Communications, 2020
Siroheme is an essential bacterial iron tetrapyrrole used by siroheme-dependent sulfite and nitrite reductases. Here the authors shed light on the catalytic mechanisms of siroheme synthase through the structures of the bifunctional dehydrogenase ...
Joseph M. Pennington, Michael Kemp, Lauren McGarry, Yu Chen, M. Elizabeth Stroupe   +4 more
doaj   +1 more source

Crosstalk between nitrite, myoglobin and reactive oxygen species to regulate vasodilation under hypoxia. [PDF]

PLoS ONE, 2014
The systemic response to decreasing oxygen levels is hypoxic vasodilation. While this mechanism has been known for more than a century, the underlying cellular events have remained incompletely understood.
Matthias Totzeck, Ulrike B Hendgen-Cotta, Malte Kelm, Tienush Rassaf   +3 more
doaj   +1 more source

Study of the Cys-His bridge electron transfer pathway in a copper-containing nitrite reductase by site-directed mutagenesis, spectroscopic, and computational methods [PDF]

, 2018
The Cys-His bridge as electron transfer conduit in the enzymatic catalysis of nitrite to nitric oxide by nitrite reductase from Sinorhizobium meliloti 2011 (SmNir) was evaluated by site-directed mutagenesis, steady state kinetic studies, UV-vis and EPR ...
Brondino, Carlos Dante, Cristaldi, Julio César, Dalosto, Sergio Daniel, Ferroni, Felix Martín, González, Pablo Javier, Gómez, María C., Rivas, Maria Gabriela, Rizzi, Alberto Claudio   +7 more
core   +1 more source

Bringing Nitric Oxide to the Molybdenum World—A Personal Perspective

Molecules, 2023
Molybdenum-containing enzymes of the xanthine oxidase (XO) family are well known to catalyse oxygen atom transfer reactions, with the great majority of the characterised enzymes catalysing the insertion of an oxygen atom into the substrate. Although some
Luisa B. Maia
doaj   +1 more source

Bioaugmentation of UASB reactors with immobilized Sulfurospirillum barnesii for simultaneous selenate and nitrate removal [PDF]

, 2009
Whole-cell immobilization of selenate-respiring Sulfurospirillum barnesii in polyacrylamide gels was investigated to allow the treatment of selenate contaminated (790¿µg Se¿×¿L-1) synthetic wastewater with a high molar excess of nitrate (1,500 times) and
Aelst, A.C., van, Enright, A.M., Lens, P.N.L., Lenz, M., O’Flaherty, V.   +4 more
core   +2 more sources

Resolving the contributions of the membrane-bound and periplasmic nitrate reductase systems to nitric oxide and nitrous oxide production in Salmonella enterica serovar Typhimurium [PDF]

, 2011
The production of cytotoxic nitric oxide (NO) and conversion into the neuropharmacological agent and potent greenhouse gas nitrous oxide (N2O) is linked with anoxic nitrate catabolism by Salmonella enterica serovar Typhimurium.
Anderson, Anke Arkenberg, Barth, Bleakley, Bodenmiller, Burlat, Carl Harrington, Clarke, Cole, Corinne Appia-Ayme, Costa, Daniela Hensen, Datsenko, David J. Richardson, Elizabeth Baggs, Fersht, Filenko, Gary Rowley, Gilberthorpe, Gilberthorpe, Heather Felgate, Hoiseth, Ji, Jia, Julea N. Butt, Karen Prior, Kim, Mellies, Metheringham, Mills, Nicholas, Poock, Pope, Potter, Potter, Richardson, Sarah J. Field, Satoh, Simon, Smith, Smith, Spiro, Spiro, Stewart, Stewart, Stewart, Stewart, van Riet, van Wonderen, Wang, Weiss   +50 more
core   +1 more source

Rhizobium etli Produces Nitrous Oxide by Coupling the Assimilatory and Denitrification Pathways

Frontiers in Microbiology, 2019
More than two-thirds of the powerful greenhouse gas nitrous oxide (N2O) emissions from soils can be attributed to microbial denitrification and nitrification processes.
Alba Hidalgo-García, María J. Torres, Ana Salas, Eulogio J. Bedmar, Lourdes Girard, María J. Delgado   +5 more
doaj   +1 more source

Nitrous oxide production in soil isolates of nitrate-ammonifying bacteria [PDF]

, 2012
Here we provide the first demonstration of the potential for N2O production by soil-isolated nitrate-ammonifying bacteria under different C and N availabilities, building on characterizations informed from model strains.
Bamford, Bleakley, Cole, Costa, Cruz Ramos, Fazzolari, Gilberthorpe, Hussain, Iobbi-Nivol, Jepson, Jormakka, Kelso, Lane, Macdonald, Mohan, Nakano, Pett-Ridge, Pope, Potter, Sambrook, Schmidt, Silver, Silver, Simon, Smith, Smith, Smith, Stevens, Wan, Yin   +29 more
core   +2 more sources

Nitrite Reductase Activity of Cytochrome c [PDF]

Journal of Biological Chemistry, 2008
Small increases in physiological nitrite concentrations have now been shown to mediate a number of biological responses, including hypoxic vasodilation, cytoprotection after ischemia/reperfusion, and regulation of gene and protein expression. Thus, while nitrite was until recently believed to be biologically inert, it is now recognized as a potentially
Swati, Basu, Natalia A, Azarova, Michael D, Font, S Bruce, King, Neil, Hogg, Mark T, Gladwin, Sruti, Shiva, Daniel B, Kim-Shapiro   +7 more
openaire   +2 more sources