Results 11 to 20 of about 36,091 (300)

Electronic landscape of the P-cluster of nitrogenase as revealed through many-electron quantum wavefunctions [PDF]

open access: yes, 2019
The electronic structure of the nitrogenase metal cofactors is central to nitrogen fixation. However, the P-cluster and iron molybdenum cofactor, each containing eight irons, have resisted detailed characterization of their electronic properties. Through
Chan, Garnet Kin-Lic   +3 more
core   +3 more sources

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

open access: yesJ. Phys. Chem. A 124, 4848-4854 (2020), 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   +2 more sources

Hydrogen Reactions of Nitrogenase [PDF]

open access: hybridJournal of Biological Chemistry, 1968
Abstract HD formation from either D2 and H2O or H2 and D2O is shown to be catalyzed by N2-fixing extracts of Azotobacter vinelandii. The activity parallels nitrogenase but not hydrogenase activity and is not catalyzed by the sites of nitrogenase responsible for either ATP-dependent H2 evolution or competitive inhibition by H2 of N2 fixation ...
G W Parshall   +2 more
openaire   +3 more sources

Survey on nitrogenase evolution by considering the importance of nitrogenase, its structure, and mechanism of nitrogenase

open access: yesNotulae Botanicae Horti Agrobotanici Cluj-Napoca
Nitrogenase is a complicated enzyme that actives the ATP-dependent reduction of dinitrogen (N2) to ammonia (NH3). The aim of this manuscript is to review the nitrogenase evolution with considering nitrogenase, structure of nitrogenase, action mechanism of nitrogenase and oxygen sensitive mechanism of nitrogenase.
Wenli SUN, Mohamad Hesam SHAHRAJABIAN
openaire   +3 more sources

Regulatory response to a hybrid ancestral nitrogenase in Azotobacter vinelandii

open access: yesMicrobiology Spectrum, 2023
Biological nitrogen fixation, the microbial reduction of atmospheric nitrogen to bioavailable ammonia, represents both a major limitation on biological productivity and a highly desirable engineering target for synthetic biology. However, the engineering
Alex J. Rivier   +4 more
doaj   +1 more source

A critical role of an oxygen-responsive gene for aerobic nitrogenase activity in Azotobacter vinelandii and its application to Escherichia coli

open access: yesScientific Reports, 2022
Since nitrogenase is irreversibly inactivated within a few minutes after exposure to oxygen, current studies on the heterologous expression of nitrogenase are limited to anaerobic conditions.
Ren Takimoto   +6 more
doaj   +1 more source

Potential of Phototrophic Purple Nonsulfur Bacteria to Fix Nitrogen in Rice Fields

open access: yesMicroorganisms, 2021
Biological nitrogen fixation catalyzed by Mo-nitrogenase of symbiotic diazotrophs has attracted interest because its potential to supply plant-available nitrogen offers an alternative way of using chemical fertilizers for sustainable agriculture ...
Isamu Maeda
doaj   +1 more source

Nitrogenase Fe Protein: A Multi-Tasking Player in Substrate Reduction and Metallocluster Assembly

open access: yesMolecules, 2022
The Fe protein of nitrogenase plays multiple roles in substrate reduction and metallocluster assembly. Best known for its function to transfer electrons to its catalytic partner during nitrogenase catalysis, the Fe protein is also a key player in the ...
Markus W. Ribbe   +7 more
doaj   +1 more source

Heterologous expression of a fully active Azotobacter vinelandii nitrogenase Fe protein in Escherichia coli

open access: yesmBio, 2023
The functional versatility of the Fe protein, the reductase component of nitrogenase, makes it an appealing target for heterologous expression, which could facilitate future biotechnological adaptations of nitrogenase-based production of valuable ...
Joseph B. Solomon   +7 more
doaj   +1 more source

Selenocyanate derived Se-incorporation into the nitrogenase Fe protein cluster

open access: yeseLife, 2022
The nitrogenase Fe protein mediates ATP-dependent electron transfer to the nitrogenase MoFe protein during nitrogen fixation, in addition to catalyzing MoFe protein-independent substrate (CO2) reduction and facilitating MoFe protein metallocluster ...
Trixia M Buscagan   +2 more
doaj   +1 more source

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