A mutant lacking the glutamine synthetase gene (glnA) is impaired in the regulation of the nitrate assimilation system in the cyanobacterium Synechocystis sp. strain PCC 6803.

Abstract excerpt

The existence in the unicellular cyanobacterium Synechocystis sp. strain PCC 6803 of two genes (glnA and glnN) coding for glutamine synthetase (GS) has been recently reported (J.C. Reyes and F.J. Florencio, J. Bacteriol. 176:1260-1267, 1994). In the current work, the regulation of the nitrate assimilation system was studied with a glnA-disrupted Synechocystis mutant (strain SJCR3) in which the only GS activity is...

Topics

• Amino Acids
• Biological Transport
• Cyanobacteria
• Gene Deletion
• Gene Expression Regulation, Bacterial
• Gene Expression Regulation, Enzymologic
• Glutamate-Ammonia Ligase
• Mutation
• Nitrate Reductase
• Nitrate Reductases