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Regulation of Nitrogen Fixation
1978Publisher Summary This chapter discusses the regulation of nitrogen fixation. Both the biosynthesis and the activity of nitrogenase are regulated. The product of N2 reduction, ammonia, through its effect on the biosynthesis of glutamine synthetase, represses nitrogenase synthesis but has no effect on nitrogenase activity.
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Regulation of Sulfur and Nitrogen Metabolism in Filamentous Fungi.
Annual Review of Microbiology, 1993In the filamentous fungi, N. crassa and A. nidulans, complex regulatory circuits control nitrogen metabolism and sulfur metabolism. The expression of entire sets of unlinked structural genes that encode metabolic enzymes is repressed when favored sulfur or nitrogen sources are available. These structural genes are coregulated by global positive-acting
George A. Marzluf, G A Marzluf
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Nitrogen and light regulate symbiotic nitrogen fixation by a temperate forest tree
Oecologia, 2023Symbiotic nitrogen fixation (SNF) is a critical mechanism of ecosystem recovery, and in forests of the eastern United States, the most common tree species that supports SNF is black locust (Robinia pseudoacacia L.). Despite its prevalence, black locust's fixation strategy-whether it maintains fixation at a constant rate (obligate fixation) or reduces ...
Sarah L. Ottinger +2 more
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Transcriptional Self-Regulation of the Master Nitrogen Regulator GlnR in Mycobacteria
Journal of Bacteriology, 2023In actinomycetes, the nitrogen metabolism not only is essential for the construction of life macromolecules but also affects the biosynthesis of secondary metabolites and even virulence (e.g., Mycobacterium tuberculosis ).
Juanmei He +8 more
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Regulation of Nitrogen Fixation
2009Nitrogen fixation is the process of reducing atmospheric dinitrogen to ammonia, carried out by the enzyme nitrogenase using a source of reductant and energy (ATP). Early studies in the field of nitrogen fixation involved the discovery of nitrogenase and understanding the physiological properties of diazotrophs, including the evidence that most purple ...
Bernd Masepohl, Robert G. Kranz
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Nitrogen Metabolite Regulation of Antibiotic Biosynthesis
Annual Review of Microbiology, 1980INTRODUCTION ...... . . . . . . . . . . . . . . .... . . . . . . . ......... . . . . . . ........ 210 RELATIONSHIP BETWEEN GROWTH AND ANTIBIOTIC PRODUCTION 2 1 1 NITROGEN METABOLISM AND ANTIBIOTIC BIOSYNTHESIS ..... . . . . . . . . ....... 212 Nitrogen Nutrition and Antibiotic Production 212 The Origin oj the Nitrogen Atom in the Antibiotic ...
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[Nitrogen regulation in microorganisms].
Zentralblatt fur Mikrobiologie, 1988The central role of NH4+-assimilation in the microbial metabolization of several inorganic nitrogen sources and the regulation of its key enzymes--glutamate dehydrogenases (GDH--EC 1.4.1.2. and EC 1.4.1.4.), glutamine synthetase (GS--EC 6.3.1.2.) and glutamate synthase (GOGAT--EC 1.4.1.3.)--are presented.
J, Huth, P, Liebs
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Regulation of Nitrogen Assimilation
1996The preferred single nitrogen source for Escherichia coli and other enteric bacteria is ammonia, in at least 1 mM concentration. Although a number of other nitrogen containing compounds for example arginine, proline, glutamine, glutamate and aspartate in the case of E.
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REGULATION AND GENETICS OF BACTERIAL NITROGEN FIXATION
Annual Review of Microbiology, 1975KLEBSIELLA . .. . .. . . . . . . . . . . . ... . . . ... . . . . . . . . . . . . . . Control of Nitrogen Fixation Repression by fixed nitrogen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Repression by 0] . Requirement of Mo for nitrogenase synthesis . N] as an inducer of nitrogenase synthesis .
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Genetic regulation of nitrogen metabolism in the fungi
Microbiology and Molecular Biology Reviews, 1997In the fungi, nitrogen metabolism is controlled by a complex genetic regulatory circuit which ensures the preferential use of primary nitrogen sources and also confers the ability to use many different secondary nitrogen sources when appropriate. Most structural genes encoding nitrogen catabolic enzymes are subject to nitrogen catabolite repression ...
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