Regulation of nitrate uptake inNostoc muscorumby glutamine synthetase
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چکیده
منابع مشابه
Regulation of synthesis of glutamine synthetase by adenylylated glutamine synthetase.
We have examined three mutants of Klebsiella aerogenes whose genetic lesions (glnB, glnD, and glnE) are in loci unlinked to the structural gene for glutamine sythetase (glnA) and in which the control of both the level and state of adenylylation of glutamine synthetase is altered. Each mutation alters a different component of the adenylylation system of glutamine synthetase [L-glutamate:ammonia ...
متن کاملRegulation of glutamine synthetase. VI. Interactions of inhibitors for Bacillus licheniformis glutamine synthetase.
The relationships of five feedback inhibitors for the Bacillus licheniformis glutamine synthetase were investigated. The inhibitors were distinguishable by differences in their competitive relationship for the substrates of the enzyme. Mixtures of l-glutamine and adenosine-5'-monophosphate (AMP) or histidine and AMP caused synergistic inhibition of glutamine synthesis. Histidine, alanine, and g...
متن کاملTitle : Regulation of nitrate uptake
Objectives: The overall objective is to determine the physiological limitation of nitrate uptake by Fuji apple trees on M9 rootstocks in the spring and early summer. This includes: • Measuring the influence of soil temperature on nitrate uptake by the roots • Determining the impact of tree N status on nitrate uptake, by considering that during the period of N remobilisation from storage, xylem ...
متن کاملRegulation of glutamine synthetase. V. Partial purification and properties of glutamine synthetase from Bacillus licheniformis.
The glutamine synthetase of Bacillus licheniformis has been obtained at about 15% purity. Sucrose gradient centrifugation gave a molecular weight value of approximately 612,000. Both l- and d-glutamate can be utilized as substrates in the biosynthetic reaction, although the l isomer was five times more active. The requirement for adenosine triphosphate (ATP) can be partially replaced by guanosi...
متن کاملUptake of glutamate, not glutamine synthetase, regulates adaptation of mammalian cells to glutamine-free medium.
Two cell lines (McCoy and MDCK) were studied in an attempt to understand the metabolic changes associated with adaptation to glutamine-free medium (GMEM + gmate). McCoy cells assumed normal growth rates after 2-3 passages in this medium whereas MDCK cells showed no growth in GMEM + gmate. The glutamine synthetase (GS) activity of both cell lines was elevated (up to x 9) as glutamine was deplete...
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ژورنال
عنوان ژورنال: FEMS Microbiology Letters
سال: 1982
ISSN: 0378-1097,1574-6968
DOI: 10.1111/j.1574-6968.1982.tb00018.x