Glutamine and glutamate transport by Anabaena variabilis

Potassium ion transport and electrogenesis in Anabaena variabilis.

Regulation of mitochondrial glutamine/glutamate metabolism by glutamate transport: studies

Welbourne, Tomas, and Itzhak Nissim. Regulation of mitochondrial glutamine/glutamate metabolism by glutamate transport: studies with 15N. Am J Physiol Cell Physiol 280: C1151–C1159, 2001.—We focused on the role of plasma membrane glutamate uptake in modulating the intracellular glutaminase (GA) and glutamate dehydrogenase (GDH) flux and in determining the fate of the intracellular glutamate in ...

Ammonium (methylammonium) transport by heterocysts and vegetative cells of Anabaena variabilis.

Transport of the ammonium analogue [(14)C]methylammonium was similar in non-growing, fully differentiated heterocysts as compared to vegetative, multiplying cells of the filamentous cyanobacterium Anabaena variabilis. NH(4)(+) inhibited uptake into the cells and released accumulated methylammonium from the cells. These observations suggest that the main function of ammonium transport in heteroc...

Effect of glutamine on growth and heterocyst differentiation in the cyanobacterium Anabaena variabilis.

Mutants of the cyanobacterium Anabaena variabilis that were capable of increased uptake of glutamine, as compared with that in the parental strains, were isolated. Growth of these mutants and their parental strains was measured in media containing N2, ammonia, or glutamine as a source of nitrogen. All strains grew well with any one of these sources of fixed nitrogen. Much of the glutamine taken...

Inhibition of glutamate transport in Synechococcus cedrorum by glutamine.

The absence of glutamate transport in glutamine-grown cells of Synechococcus cedrorum R7 was due to feedback inhibition and not repression of transport activity.