The Arabidopsis glutamine synthetase2 mutants grow normally in the air, challenging the paradigm that chloroplastic GLUTAMINE SYNTHETASE2 is the primary enzyme to assimilate photorespiratory .
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http://dx.doi.org/10.1093/plphys/kiac224 | DOI Listing |
Plant Physiol
August 2022
Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan.
The Arabidopsis glutamine synthetase2 mutants grow normally in the air, challenging the paradigm that chloroplastic GLUTAMINE SYNTHETASE2 is the primary enzyme to assimilate photorespiratory .
View Article and Find Full Text PDFInt J Mol Sci
May 2020
Plant Sciences Department, Rothamsted Research, Harpenden AL5 2JQ, UK.
Free (soluble, non-protein) asparagine concentration can increase many-fold in wheat grain in response to sulphur deficiency. This exacerbates a major food safety and regulatory compliance problem for the food industry because free asparagine may be converted to the carcinogenic contaminant, acrylamide, during baking and processing. Here, we describe the predominant route for the conversion of asparagine to acrylamide in the Maillard reaction.
View Article and Find Full Text PDFCell
September 2018
Department of Biological Regulation, Weizmann Institute of Science, 7610001 Rehovot, Israel. Electronic address:
The urea cycle (UC) is the main pathway by which mammals dispose of waste nitrogen. We find that specific alterations in the expression of most UC enzymes occur in many tumors, leading to a general metabolic hallmark termed "UC dysregulation" (UCD). UCD elicits nitrogen diversion toward carbamoyl-phosphate synthetase2, aspartate transcarbamylase, and dihydrooratase (CAD) activation and enhances pyrimidine synthesis, resulting in detectable changes in nitrogen metabolites in both patient tumors and their bio-fluids.
View Article and Find Full Text PDFRNA Biol
November 2017
a Institut für Allgemeine Mikrobiologie, Christian-Albrechts-Universität zu Kiel, Am Botanischen Garten 1-9, Kiel , Germany.
Trans-encoded sRNA is exclusively expressed under nitrogen (N)-deficiency in Methanosarcina mazei strain Gö1. The sRNA deletion strain showed a significant decrease in growth under N-limitation, pointing toward a regulatory role of sRNA in N-metabolism. Aiming to elucidate its regulatory function we characterized sRNA by means of biochemical and genetic approaches.
View Article and Find Full Text PDFPlant Cell Physiol
April 2015
Graduate School of Agricultural Science, Tohoku University, 1-1 Tsutsumidori-Amamiyamachi, Aoba-ku, Sendai, 981-8555 Japan
Asparagine is synthesized from glutamine by the reaction of asparagine synthetase (AS) and is the major nitrogen form in both xylem and phloem sap in rice (Oryza sativa L.). There are two genes encoding AS, OsAS1 and OsAS2, in rice, but the functions of individual AS isoenzymes are largely unknown.
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