Cryptic glutamate dehydrogenase; GudB seems to be intrinsically inactive, however spontaneous mutations removing a 9-bp direct repeat within the wild-type gudB sequence activated the GudB protein and allowed more-efficient utilization of amino acids of the glutamate family. This insertion presumably causes severe destabilization of the fold of the protein, leading to an inactive enzyme that is very quickly degraded. The cryptic GudB serves as a buffer that may compensate for mutations in the rocG gene and that can also be decryptified for the utilization of glutamate as a single carbon [...]

Glutamate dehydrogenase; Devoted to catabolic function of glutamate (and other amino acids of the glutamate family) utilization as sole nitrogen source. It is not involved in anabolic function of glutamate biosynthesis since B.subtilis possesses only one route of glutamate biosynthesis from ammonia, catalyzed by glutamate synthase. RocG is unable to utilize glutamate or glutamine as sole carbon source and to synthesize glutamate, but it is involved in the utilization of arginine, and proline as carbon or nitrogen source. The catabolic RocG is essential for controlling gltAB expression [...]

Glutamine synthetase; Glutamine synthetase (GS) is an unusual multitasking protein that functions as an enzyme, a transcription coregulator, and a chaperone in ammonium assimilation and in the regulation of genes involved in nitrogen metabolism. It catalyzes the ATP-dependent biosynthesis of glutamine from glutamate and ammonia. Feedback-inhibited GlnA interacts with and regulates the activity of the transcriptional regulator TnrA. During nitrogen limitation, TnrA is in its DNA- binding active state and turns on the transcription of genes required for nitrogen assimilation. Under condi [...]

Transcriptional regulator (LysR family); Positive regulator of glutamate biosynthesis (gltAB genes). Negatively regulates its own expression.

Putative flavoenzyme; Evidence 3: Function proposed based on presence of conserved amino acid motif, structural feature or limited homology; Product type pe: putative enzyme.

Arginine-specific carbamoyl-phosphate synthetase (large subunit); Evidence 1a: Function experimentally demonstrated in the studied strain; Product type e: enzyme; Belongs to the CarB family.

Pyrimidine-specific carbamoyl-phosphate synthetase (large subunit); Evidence 1a: Function experimentally demonstrated in the studied strain; Product type e: enzyme; Belongs to the CarB family.

Glutaminase; Evidence 1a: Function experimentally demonstrated in the studied strain; Product type e: enzyme.

L-glutamine-D-fructose-6-phosphate amidotransferase; Catalyzes the first step in hexosamine metabolism, converting fructose-6P into glucosamine-6P using glutamine as a nitrogen source.