Nitrate and nitrite are key components of the global nitrogen cycle. As such, Nature has evolved proteins as biological supramolecular hosts for the recognition, translocation, and transformation of both nitrate and nitrite. To understand the supramolecular principles that govern these anion-protein interactions, here, we employ a hybrid biophysical and approach to characterize the thermodynamic properties and protein dynamics of NrtA from the cyanobacterium for the recognition of nitrate and nitrite.
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http://dx.doi.org/10.1039/d1cc05879g | DOI Listing |
Anal Chim Acta
February 2025
Department of Chemistry, National Taiwan Normal University, Taipei, 11677, Taiwan. Electronic address:
Background: Monitoring nitrate and nitrite levels in water is vital for protecting human health, aquatic ecosystems, and regulatory compliance. However, traditional detection methods often involve environmentally harmful chemicals. This study introduces a sustainable alternative by leveraging metabolically engineered E.
View Article and Find Full Text PDFWorld J Microbiol Biotechnol
January 2025
Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China.
Nitrification, the oxidation of ammonium to nitrate via nitrite, links nitrogen fixation and nitrogen loss processes, playing key roles in coastal nitrogen cycle. However, few studies have simultaneously examined both ammonia-oxidizing and nitrite-oxidizing microbes. This work investigated the abundance and community structure of ammonia-oxidizing archaea (AOA), ammonia-oxidizing bacteria (AOB), and nitrite-oxidizing bacteria (NOB) using archaeal amoA gene, bacterial amoA gene, and NOB nxrB gene, respectively, through q-PCR and Sanger sequencing along the Changjiang Estuary salinity gradient.
View Article and Find Full Text PDFPlant Sci
January 2025
UMR INRAE 1355, Université Nice Côte d'Azur, Institut Sophia Agrobiotech, 06903 Sophia Antipolis, France. Electronic address:
Flooding induces hypoxia in plant tissues, impacting various physiological and biochemical processes. This study investigates the adaptive response of the roots and nitrogen-fixing nodules of Medicago truncatula in symbiosis with Sinorhizobium meliloti under short-term hypoxia caused by flooding. Four-week-old plants were subjected to flooding for 1 to 4 days.
View Article and Find Full Text PDFLeg Med (Tokyo)
January 2025
Department of Forensic Medicine, Faculty of Medicine, Jagiellonian University Medical College, Grzegórzecka 16 31-531 Kraków, Poland. Electronic address:
This paper reports three rare cases of accidental sodium nitrite poisoning, including one fatality, caused by the consumption of aspic purchased from a private vendor. Clinical symptoms included cyanosis, hypotension, and respiratory distress, with methemoglobin (MetHb) levels ranging from 5 % to 41.7 %.
View Article and Find Full Text PDFVet Anim Sci
March 2025
Animal Science Research Department, Fars Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shiraz, Iran.
This study aims to measure the effects of different dietary concentrations of triticale hay (TH) on productive performance, carcass characteristics, microbial protein synthesis (MPS), ruminal and blood variables, and antioxidant power in 40 fattening male Gray Shirazi lambs (BW of 33.2 ± 1.1 kg) over 81 days in a completely randomized design (10 animals/diet).
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