Results 321 to 330 of about 558,186 (382)

Biochemical and structural characterization of chlorite dismutase enzyme from Pseudomonas aeruginosa

The 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, Eleni K. Panagiotopoulou, Antonios I. Kapogiannatos, Georgios E. Premetis, Nikolaos E. Labrou, Eleni K. Efthimiadou, Anastassios C. Papageorgiou, Evangelia G. Chronopoulou   +7 more
wiley   +1 more source

Studies of the membrane‐bound flavocytochrome MsrQ flavin mononucleotide (FMN)‐binding site reveal an unexpected ubiquinone cofactor

The FEBS Journal, EarlyView.
The membrane‐bound heme flavoprotein MsrQ is the specific electron donor for the periplasmic methionine sulfoxide reductase MsrP. Analysis of its flavin environment revealed that ubiquinone (UQ) is a cofactor for MsrQ. However, redox studies demonstrate that UQ cannot function as an electron donor for the MsrPQ system.
Philippe Carpentier, Fabien Pierrel, Nicolas Duraffourg, Bruno Guigliarelli, Mahmoud Hajj Chehade, Laura Flandrin, Christian Basset, Christelle Caux, Stéphane Torelli, Vincent Nivière   +9 more
wiley   +1 more source

Relationship Between Periodontitis and Nitric Oxide in Patients Undergoing Maintenance Hemodialysis

Hemodialysis International, EarlyView.
ABSTRACT Background The inflammatory processes associated with periodontitis have been implicated in the development and progression of systemic diseases, including chronic kidney disease (CKD). Notably, individuals with CKD frequently exhibit shared risk factors with those affected by periodontitis, such as hypertension, smoking, and diabetes mellitus.
Gabriela Keiko Izumi, Caroline Vidal Paseto, Rafael Fiorese Costa, Gabrielle Delfrate, Aline Borsato Hauser, Daniel Fernandes, Maria Ângela Naval Machado, Reila Tainá Mendes   +7 more
wiley   +1 more source

The molecular mechanisms of defensive‐grade organic acid biosynthesis in ground beetles

Insect Molecular Biology, EarlyView.
Formic acid and methacrylic acid are the primary defensive chemicals in the pygidial gland secretions of Platynus angustatus and Pterostichus moestus, respectively. Comparative transcriptomics suggests the folate cycle and valine catabolism may be involved in the biosynthesis of formic acid and methacrylic acid, respectively.
Adam M. Rork, Sihang Xu, Athula Attygalle, Tanya Renner   +3 more
wiley   +1 more source

The loss of the urea cycle and ornithine metabolism in different insect orders: An omics approach

Insect Molecular Biology, EarlyView.
Among urea cycle enzymes, only the nitric oxide synthase gene is universally present across insect genomes. All Hemiptera species lack the enzymes needed to convert citrulline to arginine, and some also lack the pathway from arginine to ornithine. Putrescine and spermidine synthesis is conserved in all insects, but aphids lack the capability to produce
Jessica Cristina Silva Martins, Héctor Antônio Assunção Romão, Carolina Kurotusch Canettieri, Amanda Caetano Cercilian, Patrícia Rasteiro Ordiale Oliveira, Clelia Ferreira, Walter R. Terra, Renata de Oliveira Dias   +7 more
wiley   +1 more source

The road less taken: Dihydroflavonol 4‐reductase inactivation and delphinidin anthocyanin loss underpins a natural intraspecific flower colour variation

Molecular Ecology, EarlyView.
Abstract Visual cues are of critical importance for the attraction of animal pollinators, however, little is known about the molecular mechanisms underpinning intraspecific floral colour variation. Here, we combined comparative spectral analysis, targeted metabolite profiling, multi‐tissue transcriptomics, differential gene expression, sequence ...
Darren C. J. Wong, Zemin Wang, James Perkins, Xin Jin, Grace Emma Marsh, Emma Grace John, Rod Peakall   +6 more
wiley   +1 more source

ModE Regulates Alternative Nitrogenase Expression in the Methanogen Methanosarcina acetivorans

Molecular Microbiology, EarlyView.
During nitrogen fixation, the methanogen Methanosarcina acetivorans produces the alternative vanadium‐nitrogenase and iron‐nitrogenase only when molybdenum is unavailable to support the activity of molybdenum‐nitrogenase. Our work demonstrates that the expression of the alternative nitrogenases in M.
Melissa Chanderban, Daniel J. Lessner
wiley   +1 more source

In Vitro, Ex Vivo, and In Vivo Evidence of Nitrate-Reducing Activity in <i>Levilactobacillus brevis</i> CD2: A Potential Tool for Oral and Systemic Health Applications. [PDF]

Foods
Altamura S, Augello FR, Lombardi F, Palumbo P, Cinque B, Pietropaoli D, De Simone C.   +6 more
europepmc   +1 more source

Nitrate reductase for nitrate analysis in water [PDF]

Environmental Chemistry Letters, 2006
Nitrate analysis in water is one of the most frequently applied methods in environmental chemistry. Current methods for nitrate are generally based on toxic substances. Here, we show that a viable alternative method is to use the enzyme nitrate reductase.
Guillaume G. Barbier, Wilbur H. Campbell, Pengfei Song   +2 more
openaire   +1 more source

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Regulation of Nitrate Reductase in Chlorella. Nitrate Requirement for the Appearance of Nitrate Reductase Activity

Plant Science Letters, 1983
Summary Cells of Chlorella vulgaris (Cambridge culture collection, strain 211/12) grown in chemostat under conditions of nitrate limitation, exhibit very high levels of nitrate reductase activity. Similar levels of activity were found in cells grown in chemostat with a limited nitrogen source constituted by 75% ammonium plus 25% nitrate. By contrast,
Di Martino Rigano V, Vona V, FUGGI, Amodio, Di Martino C, Rigano C.   +4 more
openaire   +5 more sources