Results 121 to 130 of about 258,549 (335)

Nitrous oxide metabolism in nitrate-reducing bacteria: Physiology and regulatory mechanisms [PDF]

open access: yes, 2016
Nitrous oxide (N2O) is an important greenhouse gas (GHG) with substantial global warming potential and also contributes to ozone depletion through photochemical nit- ric oxide (NO) production in the stratosphere.
Bedmar, Eulogio   +6 more
core   +1 more source

Nitrogen Starvation Acclimation in Synechococcus elongatus: Redox-Control and the Role of Nitrate Reduction as an Electron Sink

open access: yesLife, 2015
Nitrogen starvation acclimation in non-diazotrophic cyanobacteria is characterized by a process termed chlorosis, where the light harvesting pigments are degraded and the cells gradually tune down photosynthetic and metabolic activities.
Alexander Klotz   +3 more
doaj   +1 more source

The radical SAM enzyme NirJ cleaves off two propionate side chains with the release of acrylate during heme d1 biosynthesis

open access: yesThe FEBS Journal, EarlyView.
The radical SAM enzyme NirJ is responsible for the removal of two propionate side chains from its substrate didecarboxy‐siroheme during heme d1 biosynthesis. The cleavage products of the NirJ reaction were not known so far. In this study, it is shown that acrylate is formed as the reaction byproduct and that the resulting tetrapyrrole product carries ...
Heike Meyer   +5 more
wiley   +1 more source

Identification of CO‐binding modes in the CuB site of bovine cytochrome c oxidase by spatial mapping of binding energy

open access: yesThe FEBS Journal, EarlyView.
Quantum simulations of the catalytic center (CuB) of cytochrome c oxidase, driving the electron transport system, revealed a crucial role of Val243 in modulation of ligand binding. Val243‐driven interaction facilitates hybridization between CO and Fe orbitals, thus highlighting Val243's impact on electronic structure and ligand dynamics.
Jiyoung Kang   +2 more
wiley   +1 more source

The ins and outs of metal homeostasis by the root nodule actinobacterium Frankia [PDF]

open access: yes, 2014
Background: Frankia are actinobacteria that form a symbiotic nitrogen-fixing association with actinorhizal plants, and play a significant role in actinorhizal plant colonization of metal contaminated areas.
Furnholm, Teal R., Tisa, Louis S.
core   +2 more sources

Characterization of the periplasmic redox network that sustains the versatile anaerobic metabolism of Shewanella oneidensis MR-1

open access: yesFrontiers in Microbiology, 2015
The versatile anaerobic metabolism of the Gram-negative bacterium Shewanella oneidensis MR-1 (SOMR-1) relies on a multitude of redox proteins found in its periplasm.
Mónica N. Alves   +8 more
doaj   +1 more source

Biochemical and structural characterization of chlorite dismutase enzyme from Pseudomonas aeruginosa

open access: yesThe FEBS Journal, EarlyView.
Chlorite dismutase (Cld) is a heme b oxidoreductase that can decompose chlorite (ClO2−$$ {\mathrm{ClO}}_2^{-} $$ or OClO−) into harmless chloride (Cl−) and dioxygen (O2) with high turnover rates. Cld was found to be involved in different biological processes, and the rare reaction it catalyzes makes it a prominent enzyme for different applications. The
Dimitrios V. Nokas   +7 more
wiley   +1 more source

Synthetic and Evolutionary Construction of a Chlorate-Reducing Shewanella oneidensis MR-1. [PDF]

open access: yes, 2015
UnlabelledDespite evidence for the prevalence of horizontal gene transfer of respiratory genes, little is known about how pathways functionally integrate within new hosts.
Carlson, Hans K   +5 more
core   +3 more sources

Siroheme Is Essential for Assimilation of Nitrate and Sulfate as Well as Detoxification of Nitric Oxide but Dispensable for Murine Virulence of Aspergillus fumigatus

open access: yesFrontiers in Microbiology, 2018
The saprophytic mold Aspergillus fumigatus is the most common airborne fungal pathogen causing severe invasive fungal infections in immunocompromised patients.
Anna-Maria Dietl   +4 more
doaj   +1 more source

Allosteric communication in Dihydrofolate Reductase: Signaling network and pathways for closed to occluded transition and back [PDF]

open access: yesarXiv, 2007
E. Coli. dihydrofolate reductase (DHFR) undergoes conformational transitions between the closed (CS) and occluded (OS) states which, respectively, describe whether the active site is closed or occluded by the Met20 loop. A sequence-based approach is used to identify a network of residues that represents the allostery wiring diagram.
arxiv  

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