Results 81 to 90 of about 28,179 (272)
Scientific Reports, 2017 Heterocysts are differentiated cells formed by some filamentous, diazotrophic (dinitrogen-fixing) cyanobacteria. The heterocyst is the site of dinitrogen fixation providing the oxygen-sensitive nitrogenase with a low-oxygen environment.
Lucas J. Stal
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Structural basis for the conformational protection of nitrogenase from O2 [PDF]
Structural DynamicsThe low reduction potentials required for the reduction of dinitrogen (N2) render metal-based nitrogen-fixation catalysts vulnerable to irreversible damage by dioxygen (O2).
Sarah M Narehood +8 more
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Frontiers in Microbiology, 2023 Nitrogenase in some bacteria and archaea catalyzes conversion of N2 to ammonia. To reconstitute a nitrogenase biosynthetic pathway in a eukaryotic host is still a challenge, since synthesis of nitrogenase requires a large number of nif (nitrogen fixation)
Minyang Wang +3 more
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Artificial Enzymatic Electrochemistry
ChemElectroChem, EarlyView.Artificial enzymatic electrochemistry has emerged as an effective method to extend the catalytic abilities of enzymes. This review explores the bioelectrochemical methods used to understand and optimize the structure and function of artificial enzymes.
Nya E. Black +3 more
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Diversity and Functional Analysis of the FeMo-Cofactor Maturase NifB
Frontiers in Plant Science, 2017 One of the main hurdles to engineer nitrogenase in a non-diazotrophic host is achieving NifB activity. NifB is an extremely unstable and oxygen sensitive protein that catalyzes a low-potential SAM-radical dependent reaction.
Simon Arragain +5 more
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High Pressure Stabilizes the Elusive Hexacoordinated Carbon
ChemistryEurope, EarlyView.The MCF6 species (M = Ca, Sr) is more stable than the bicomponent MF2…CF4 mixture in the solid‐state at high pressure (p > 400 GPa). The main building block is the [CF6]2− unit in which carbon is hexacoordinated. Unusually high coordination number for elements has been of great interest in chemistry.
Shovan Das, Adrish Das, Ayan Datta
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Frontiers in Microbiology, 2018 As inorganic nitrogen compounds are essential for basic building blocks of life (e.g., nucleotides and amino acids), the role of biological nitrogen-fixation (BNF) is indispensible.
Prabina K. Meher +7 more
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Accurate Calculation of Electron Paramagnetic Resonance Parameters for Molybdenum Compounds
ChemPhysChem, EarlyView.Using a curated database of experimentally characterized, biologically relevant Mo(V) compounds, this study evaluates the optimal choice of basis sets, density functionals, and wavefunction methods for accurately computing g‐tensor values and 95Mo hyperfine coupling constants, with the goal of establishing reliable protocols for predicting electron ...
Maria Drosou +3 more
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Frontiers in Microbiology, 2018 Nitrogen (N2) fixation is a major source of nitrogen that supports primary production in the vast oligotrophic areas of the world’s oceans. The Western Tropical South Pacific has recently been identified as a hotspot for N2 fixation. In the Noumea lagoon
Britt A. Henke +3 more
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Influence of environment and mineralogy on euendolithic microboring patterns
The Depositional Record, EarlyView.Field experiments at Little Ambergris Cay reveal that euendolithic microorganisms preferentially bore carbonate substrates based on mineralogy, sea water saturation and trace metal content. Results highlight night‐time dissolution activity and mineralogical preferences, shedding light on the ecological and evolutionary drivers of bioerosion and their ...
Tyler Lincoln +3 more
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