Results 241 to 250 of about 91,152 (296)
The Keystone‐Pathogen Hypothesis Updated: The Role of Porphyromonas gingivalis in Periodontitis
Journal of Periodontal Research, EarlyView.Porphyromonas gingivalis orchestrates a coordinated manipulation of immune and inflammatory responses in periodontal tissues which leads to the generation of a dysbiotic, subgingival biofilm community, and progression of periodontitis. The type 9 secretion system, lipid A modification, and the formation of outer membrane vesicles are important ...
Mike A. Curtis +2 more
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The Oral‐Gut Axis: Bidirectional Interactions Between Microbiome and Diseases
Journal of Periodontal Research, EarlyView.This study aims to summarize the mechanisms underlying ectopic colonization of the gut by oral pathobionts and the microbial and host factors that regulate this process. ABSTRACT Increased colonization of typically oral microorganisms is frequently observed in the gut mucosa or lumen of individuals with gastrointestinal disorders, including patients ...
Shinya Ebihara, Nobuhiko Kamada
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Molecular Microbiology, EarlyView.This study investigates in vivo the role of the flavin reductase Fre as an electron supplier to the periplasmic methionine sulfoxide reductase system MsrPQ. ABSTRACT The MsrPQ system is essential for the repair of oxidized methionine residues in periplasmic proteins, ensuring bacterial resistance to oxidative stress and envelope integrity.
Laurent Loiseau, Benjamin Ezraty
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Carbon monoxide metabolism in freshwater anaerobic methanotrophic archaea. [PDF]
Nat CommunEgas RA +5 more
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Nitrate reductase regulation: Effects of nitrate and light on nitrate reductase mRNA accumulation
Molecular Genetics and Genomics, 1989Regulation of nitrate reductase mRNA by light and nitrate was studied in barley seedlings using a partial cDNA clone as a probe. Nitrate reductase mRNA was detected in roots and leaves within 40 min after supplying nitrate to the roots and reached peak accumulation at 2 h in the roots and at 12 h in the leaves.
James M. Melzer +2 more
exaly +2 more sources
A method for the determination of nitrate reductase
Journal of Proteomics, 1981A procedure for the assay of nitrate reductase based on Szekely's diaminodiphenylsulphone method of nitrate determination (Szekely, E. (1967) Talanta 14, 941-950) is described. The method is simple and sensitive, allowing determination of 1 microgram of nitrate in a volume of 1 ml or less.
R M, Daniel, M P, Curran
exaly +3 more sources
Nitrate reductase for nitrate analysis in water
Environmental Chemistry Letters, 2006Nitrate 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.
Wilbur H Campbell
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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 +4 more
openaire +4 more sources
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 +4 more
openaire +4 more sources
Dissimilatory nitrate reductases in bacteria
Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression, 1999184 ref.
Philippot, Laurent, L., Hojberg, O.
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Molecular and General Genetics MGG, 1981
The existence of a nitrate-reductase operon in the tryptophane region was deduced from the effects of prophage insertion in each of chlI and chlC genes and from transposition of the Mu-mediated host DNA fragments of F-prime. This operon appears to be polarized from chlC to chlI and the gene order in the region is trp -- chlI -- chlC -- purB.
V, Bonnefoy-Orth +3 more
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The existence of a nitrate-reductase operon in the tryptophane region was deduced from the effects of prophage insertion in each of chlI and chlC genes and from transposition of the Mu-mediated host DNA fragments of F-prime. This operon appears to be polarized from chlC to chlI and the gene order in the region is trp -- chlI -- chlC -- purB.
V, Bonnefoy-Orth +3 more
openaire +2 more sources