Results 31 to 40 of about 4,180 (199)

Isolation and characterization of a ntrC mutant of Bradyrhizobium (Parasponia) sp. ANU289 [PDF]

Journal of General Microbiology, 1992
A mutant of Bradyrhizobium (Parasponia) sp. ANU289 affected in the regulation of nitrogen metabolism was isolated. The mutant, designated ANU293, was unable to induce ammonium transport (Amt), nitrate reductase (NR) or glutamine synthetase II (GSII) activities under conditions that induce these activities in the wild-type. However, glutamine synthetase
Udvardi, M. K., Lister, D. L., Day, D. A.   +2 more
openaire   +3 more sources

Exploring the Functional Relationship between y-Type Thioredoxins and 2-Cys Peroxiredoxins in Arabidopsis Chloroplasts

Antioxidants, 2020
Thioredoxins (Trxs) are small, ubiquitous enzymes that catalyze disulphide–dithiol interchange in target enzymes. The large set of chloroplast Trxs, including f, m, x and y subtypes, use reducing equivalents fueled by photoreduced ferredoxin (Fdx) for ...
Ana Jurado-Flores, Víctor Delgado-Requerey, Alicia Gálvez-Ramírez, Leonor Puerto-Galán, Juan Manuel Pérez-Ruiz, Francisco Javier Cejudo   +5 more
doaj   +1 more source

A double-negative feedback loop between NtrBC and a small RNA rewires nitrogen metabolism in legume symbionts

mBio, 2023
The nitrogen (N) status transduced via the NtrBC two-component system is a major signaling cue in the root nodule endosymbiosis of diazotrophic rhizobia with legumes.
Natalia I. García-Tomsig, Fernando M. García-Rodriguez, Sabina K. Guedes-García, Vicenta Millán, Anke Becker, Marta Robledo, José I. Jiménez-Zurdo   +6 more
doaj   +1 more source

Repressor Mutant Forms of the Azospirillum brasilense NtrC Protein [PDF]

Applied and Environmental Microbiology, 2004
ABSTRACT The Azospirillum brasilense mutant strains FP8 and FP9, after treatment with nitrosoguanidine, showed a null Nif phenotype and were unable to use nitrate as their sole nitrogen source. Sequencing of the ntrC genes revealed single nucleotide mutations in the NtrC nucleotide ...
Luciano F, Huergo, Marcelo C, Assumpção, Emanuel M, Souza, M Berenice R, Steffens, M Geoffrey, Yates, Leda S, Chubatsu, Fábio O, Pedrosa   +6 more
openaire   +2 more sources

The structural basis for regulated assembly and function of the transcriptional activator NtrC [PDF]

Genes & Development, 2006
In two-component signal transduction, an input triggers phosphorylation of receiver domains that regulate the status of output modules. One such module is the AAA+ ATPase domain in bacterial enhancer-binding proteins that remodel the σ54 form of RNA polymerase.
Sacha, De Carlo, Baoyu, Chen, Timothy R, Hoover, Elena, Kondrashkina, Eva, Nogales, B Tracy, Nixon   +5 more
openaire   +2 more sources

Nitrogen and Carbon Status Are Integrated at the Transcriptional Level by the Nitrogen Regulator NtrC In Vivo

mBio, 2013
Nitrogen regulation in Escherichia coli is a model system for gene regulation in bacteria. Growth on glutamine as a sole nitrogen source is assumed to be nitrogen limiting, inferred from slow growth and strong NtrB/NtrC-dependent gene activation. However,
Jörg Schumacher, Volker Behrends, Zhensheng Pan, Dan R. Brown, Franziska Heydenreich, Matthew R. Lewis, Mark H. Bennett, Banafsheh Razzaghi, Michal Komorowski, Mauricio Barahona, Michael P. H. Stumpf, Sivaramesh Wigneshweraraj, Jacob G. Bundy, Martin Buck   +13 more
doaj   +1 more source

Coating Cellulosic Material with Ag Nanowires to Fabricate Wearable IR-Reflective Device for Personal Thermal Management: The Role of Coating Method and Loading Level

Molecules, 2021
Textiles coated with silver nanowires (AgNWs) are effective at suppressing radiative heat loss without sacrificing breathability. Many reports present the applicability of AgNWs as IR-reflective wearable textiles, where such studies partially evaluate ...
Mohsen Gorji, Saeedeh Mazinani, Abdol-Rahim Faramarzi, Saeedeh Ghadimi, Mohammadreza Kalaee, Ali Sadeghianmaryan, Lee D. Wilson   +6 more
doaj   +1 more source

MgATP Binding and Hydrolysis Determinants of NtrC, a Bacterial Enhancer-Binding Protein [PDF]

Journal of Bacteriology, 1999
ABSTRACT When phosphorylated, the dimeric form of nitrogen regulatory protein C (NtrC) of Salmonella typhimurium forms a larger oligomer(s) that can hydrolyze ATP and hence activate transcription by the ς 54 -holoenzyme form of RNA polymerase.
Rombel, I., Peters-Wendisch, Petra, Mesecar, A., Thorgeirsson, T., Shin, Y.-K., Kustu, S.   +5 more
openaire   +3 more sources

Electron Transfer Pathways and Dynamics of Chloroplast NADPH-dependent Thioredoxin Reductase C (NTRC) [PDF]

, 2014
NADPH-dependent thioredoxin reductases (NTRs) contain a flavin cofactor and a disulfide as redox-active groups. The catalytic mechanism of standard NTR involves a large conformational change between two configurations.
Navarro, José A., Bernal-Bayard, P., Hervás, Manuel, Cejudo Rodríguez, Salomé   +3 more
core   +2 more sources

Suppressor mutations reveal an NtrC-like response regulator, NmpR, for modulation of Type-IV Pili-dependent motility in Myxococcus xanthus. [PDF]

PLoS Genetics, 2018
Two-component signaling systems (TCS) regulate bacterial responses to environmental signals through the process of protein phosphorylation. Specifically, sensor histidine kinases (SK) recognize signals and propagate the response via phosphorylation of a ...
Daniel J Bretl, Kayla M Ladd, Samantha N Atkinson, Susanne Müller, John R Kirby   +4 more
doaj   +1 more source