GltC

• Synonyms:

• Description: Transcriptional activator of the gltAB operon. Activates expression of the operon in the absence of arginine.

The gene

Basic information

• Coordinates:

• Gene length:

Database entries

• DBTBS entry: [1]

• SubtiList entry:[2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: transcription activation of the gltAB operon

• Protein family: LysR-type transcription regulator

• Paralogous protein(s): none, but there are 19 members of the LysR family in B. subtilis

Extended information on the protein

• Kinetic information:

• Domains: DNA-binding helix-turn-helix motif: AA 18 ... 37

• Modification:

• Effectors of protein activity: 2-oxoglutarate

• Interactions:
  • GltC-RocG, This interaction takes place in the presence of glutamate. It prevents the transcription activation of the gltAB operon. Note that RocG expression is strongly regulated. <ref>Commichau et al. (2007)</ref>

• Localization:

Database entries

• Structure:

• Swiss prot entry: P20668

• KEGG entry: KEGG

Expression and regulation

• Operon: gltC

• Sigma factor: SigA

• Regulation: autoregulation by GltC

• Regulatory mechanism: autorepression

• Database entries: DBTBS

• Additional information:

Biological materials

• Mutant: GP344 (erm), GP738 (spc) (available in Stülke lab)

• Expression vector: pGP903 (N-terminal His-tag) (available in Stülke lab)

• lacZ fusion:

• GFP fusion:

• Antibody: available in Stülke lab

Labs working on this gene/protein

Linc Sonenshein, Tufts University, Boston, MA, USA [3]

Jörg Stülke, University of Göttingen, Germany [4]

References

1. Belitsky, B. R., and Sonenshein, A. L. (1995) Mutations in GltC that increase Bacillus subtilis gltA expression. J Bacteriol 177: 5696-5700.[5]
2. Belitsky, B. R., and Sonenshein, A. L. (2004) Modulation of activity of Bacillus subtilis regulatory proteins GltC and TnrA by glutamate dehydrogenase. J Bacteriol 186: 3399-3407.[6]
3. Bohannon, D. E., and Sonenshein, A. L. (1989) Positive regulation of glutamate biosynthesis in Bacillus subtilis. J Bacteriol 171: 4718-4727.[7]
4. Commichau, F. M., Wacker, I., Schleider, J., Blencke, H.-M., Reif, I., Tripal, P., and Stülke, J. (2007) Characterization of Bacillus subtilis mutants with carbon source-independent glutamate biosynthesis. J Mol Microbiol Biotechnol 12: 106-113. [8]
5. Commichau, F. M., Herzberg, C., Tripal, P., Valerius, O., and Stülke, J. (2007) A regulatory protein-protein interaction governs glutamate biosynthesis in Bacillus subtilis: The glutamate dehydrogenase RocG moonlights in controlling the transcription factor GltC. Mol Microbiol 65: 642-654. [9]
6. Picossi, S., Belitsky, B. R., and Sonenshein, A. L. (2007) Molecular mechanism of the regulation of Bacillus subtilis gltAB expression by GltC. J Mol Biol 365: 1298-1313.[10]
7. Wacker, I., Ludwig, H., Reif, I., Blencke, H. M., Detsch, C., and Stülke, J. (2003) The regulatory link between carbon and nitrogen metabolism in Bacillus subtilis: regulation of the gltAB operon by the catabolite control protein CcpA. Microbiology 149: 3001-3009.

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