Results 61 to 70 of about 28,179 (272)
ACS Catalysis, 2020 Nitrogenase is the only biological catalyst that is known to be able to convert nitrogen gas to ammonia.
Y. Lee +4 more
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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.
Dennis R. Dean +3 more
openaire +3 more sources
Microbiology Spectrum, 2021 In Anabaena variabilis, the nif1 genes, which are activated by CnfR1, produce a Mo-nitrogenase that is expressed only in heterocysts. Similarly, the nif2 genes, which are activated by CnfR2, make a Mo-nitrogenase that is expressed only in anaerobic ...
Brenda S. Pratte, Teresa Thiel
doaj +1 more source
Environmental Microbiology, 2020 Summary Biological nitrogen fixation is catalyzed by the molybdenum (Mo), vanadium (V) and iron (Fe)‐only nitrogenase metalloenzymes. Studies with purified enzymes have found that the ‘alternative’ V‐ and Fe‐nitrogenases generally reduce N2 more slowly ...
K. Luxem +4 more
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Electronic landscape of the P-cluster of nitrogenase as revealed through many-electron quantum wavefunction simulations [PDF]
Nature Chemistry, 2018 The electronic structure of the nitrogenase metal cofactors is central to nitrogen fixation. However, the P-cluster and FeMo cofactor, each containing eight Fe atoms, have eluded detailed characterization of their electronic properties.
Zhendong Li +3 more
semanticscholar +1 more source
Chimeric Interaction of Nitrogenase‐Like Reductases with the MoFe Protein of Nitrogenase
ChemBioChem, 2020 AbstractThe engineering of transgenic organisms with the ability to fix nitrogen is an attractive possibility. However, oxygen sensitivity of nitrogenase, mainly conferred by the reductase component (NifH)2, is an imminent problem. Nitrogenase‐like enzymes involved in coenzyme F430 and chlorophyll biosynthesis utilize the highly homologous reductases ...
Jan Jasper +6 more
openaire +4 more sources
Antenna Modification Leads to Enhanced Nitrogenase Activity in a High Light-Tolerant Cyanobacterium
mBio, 2021 Biological nitrogen fixation is an energy-intensive process that contributes significantly toward supporting life on this planet. Among nitrogen-fixing organisms, cyanobacteria remain unrivaled in their ability to fuel the energetically expensive ...
Anindita Bandyopadhyay +4 more
doaj +1 more source
The structure of vanadium nitrogenase reveals an unusual bridging ligand
Nature Chemical Biology, 2017 Nitrogenases catalyze the reduction of N2 gas to ammonium at a complex heterometallic cofactor. Most commonly this is the FeMo cofactor (FeMoco), a [Mo:7Fe:9S:C] cluster whose exact reactivity and substrate binding mode remain unknown.
D. Sippel, O. Einsle
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Advanced Materials, EarlyView.This review gives a summary on the representative bioinspired single‐atomic‐site catalysts (SACs) and their applications in heterogeneous electrocatalysis and photocatalysis. The fundamentals of bioinspired design strategies are systematically discussed in the context of the first shell coordination, the second/long‐range coordination, and the outer ...
Ying Wang +4 more
wiley +1 more source
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