Results 91 to 100 of about 47,392 (275)

Holistic view of biological nitrogen fixation and phosphorus mobilization in Azotobacter chroococcum NCIMB 8003

Frontiers in Microbiology, 2023
Nitrogen (N) and phosphorus (P) deficiencies are two of the most agronomic problems that cause significant decrease in crop yield and quality. N and P chemical fertilizers are widely used in current agriculture, causing environmental problems and ...
Karolina A. Biełło, Carlos Lucena, Francisco J. López-Tenllado, Jesús Hidalgo-Carrillo, Gema Rodríguez-Caballero, Purificación Cabello, Lara P. Sáez, Víctor Luque-Almagro, María Dolores Roldán, Conrado Moreno-Vivián, Alfonso Olaya-Abril   +10 more
doaj   +1 more source

Critical computational analysis illuminates the reductive-elimination mechanism that activates nitrogenase for N2 reduction

Proceedings of the National Academy of Sciences of the United States of America, 2018
Significance This report critically evaluates the mechanism by which nitrogenase cleaves the N≡N triple bond. It assesses the thermodynamic driving force provided by the accompanying, apparently “wasteful,” reductive elimination of an H2, and explains ...
S. Raugei, L. Seefeldt, B. Hoffman
semanticscholar   +1 more source

Feedback inhibition of nitrogenase [PDF]

Journal of Bacteriology, 1981
No inhibition of nitrogenase activity by physiological levels of NH4+ or carbamyl phosphate was observed in extracts of Azotobacter vinelandii. All of the 15N2 reduced by cultures which received no NH4+ was found in the cells. By contrast, more than 95% of the 15N2 reduced by cultures which had been given NH4+ was found in the medium.
J K, Gordon, V K, Shah, W J, Brill
openaire   +2 more sources

The oxygen‐sensing FixLJ represses nitrogen fixation in Rhodopseudomonas palustris in response to oxygen

mLife, EarlyView.
Abstract Biological nitrogen fixation in symbiotic diazotrophs is subject to oxygen regulation by an oxygen‐sensing FixLJ two‐component system under micro‐oxic conditions. However, it remains unclear whether this mechanism is conserved in free‐living diazotrophs.
Lingwei Cui, Yan Zeng, Mengmei Wang, Lu Huang, Zheyi Wang, Ying Liu, Yanning Zheng   +6 more
wiley   +1 more source

Niche differentiation in nitrogen metabolism among methanotrophs within an operational taxonomic unit [PDF]

, 2014
Background: The currently accepted thesis on nitrogenous fertilizer additions on methane oxidation activity assumes niche partitioning among methanotrophic species, with activity responses to changes in nitrogen content being dependent on the in situ ...
Boon, Nico, De Vos, Paul, Heylen, Kim, Hoefman, Sven, van der Ha, David, Vandamme, Peter   +5 more
core   +3 more sources

Nitrogenase: A Draft Mechanism [PDF]

Accounts of Chemical Research, 2013
Biological nitrogen fixation, the reduction of N(2) to two NH(3) molecules, supports more than half the human population. The predominant form of the enzyme nitrogenase, which catalyzes this reaction, comprises an electron-delivery Fe protein and a catalytic MoFe protein.
Brian M, Hoffman, Dmitriy, Lukoyanov, Dennis R, Dean, Lance C, Seefeldt   +3 more
openaire   +2 more sources

Structure and functional genes associated with carbon, nitrogen, phosphorus, and sulfur cycling processes in periphyton: A comparison between natural and artificial rivers

River, EarlyView.
Network analysis of functional genes among prokaryotes, and eukaryotes in natural and artificial rivers. Abstract Periphyton in aquatic ecosystems plays vital roles in the elemental cycle process and is vulnerable to anthropogenic interference. However, few studies have explored the elemental cycles of carbon (C), nitrogen (N), phosphorus (P), and ...
Yulu Tian, Jiezhang Mo, Jiaxin Liu, Chenghao Li, Jiahua Guo   +4 more
wiley   +1 more source

Formation of NifA-PII complex represses ammonium-sensitive nitrogen fixation in diazotrophic proteobacteria lacking NifL

Cell Reports
Summary: Biological nitrogen fixation catalyzed by nitrogenase contributes greatly to the global nitrogen cycle. Nitrogenase expression is subject to regulation in response to nitrogen availability.
Yan Zeng, Lu Guo, Yongqiang Gao, Lingwei Cui, Mengmei Wang, Lu Huang, Mingyue Jiang, Ying Liu, Yaxin Zhu, Hua Xiang, De-Feng Li, Yanning Zheng   +11 more
doaj   +1 more source

Active Space Pair 2-Electron Reduced Density Matrix Theory for Strong Correlation

, 2020
An active space variational calculation of the 2-electron reduced density matrix (2-RDM) is derived and implemented where the active orbitals are correlated within the pair approximation.
Head-Marsden, Kade, Mazziotti, David A.
core   +1 more source

Benzimidazole Anthelmintic Compounds Albendazole and Fenbendazole Show Distinct Toxicity on the Nitrogen Fixing Bacterium Mesorhizobium loti and Its Symbiosis With Lotus japonicus

Environmental Toxicology, EarlyView.
ABSTRACT Veterinary medicines, which reach the soil mostly through the application of contaminated manures, can affect beneficial soil microorganisms, such as nitrogen‐fixing rhizobia bacteria, which engage in important symbiotic associations with plants.
Polyxeni Gorgia, Stathis Lagos, Christina N. Nikolaou, Nikoleta Basdeki, Christos Papadopoulos, Dimitrios G. Karpouzas, Daniela Tsikou   +6 more
wiley   +1 more source