gabR [2017-8-11 16:0:3]

transcription activator of gabT-gabD, repressor of gabR (MocR/ GabR family)

Locus: BSU03890

Isoelectric point: 6.71

Molecular weight: 55.00 kDa

Protein length: 479 aa

Gene length: 1437 bp

Function: regulation of gamma-amino butyric acid utilization

Product: transcription regulator

Essential: no

Synonyms: ycnF

Genomic Context

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Categories containing this gene/protein

• Metabolism → Amino acid/ nitrogen metabolism → Utilization of amino acids → Utilization of gamma-amino butyric acid
• Information processing → Regulation of gene expression → Transcription factors and their control → Transcription factors/ other

Gene

Coordinates: 440,025 → 441,464

The protein

Catalyzed reaction/ biological activity

• transcription activation of the gabT-gabD operon in the presence of GABA and PLP, transcription repression of gabR PubMed

Protein family

• MocR/ GabR family PubMed

Paralogous protein(s)

• none, but there are 7 members of the MocR/ GabR family in B. subtilis

Domains

• N-terminal DNA-binding helix-turn-helix motif (corresponding to domains of the GntR family) PubMed
• C-terminal domain is homologous to PLP-binding large domain of aminotransferases PubMed

Cofactors

• gamma-aminobutyric acid, PLP PubMed

Effectors of protein activity

• activation of gabT-gabD expression is triggered by gamma-amino butyrate and pyridoxalphosphate PubMed

Structure

• 4MGR (the apo-protein) PubMed
• 4N0B (the complex with PLP) PubMed

Expression and Regulation

Operons

• Genes: gabR
  Description: PubMed

  Sigma factors

  • SigA: sigma factor, PubMed, in SigA regulon

  Regulatory mechanism

  • GabR: negative autoregulation, PubMed, in GabR regulon

Biological materials

Mutant

• MGNA-C014 (ycnF::erm), available at the NBRP B. subtilis, Japan

Labs working on this gene/protein

• Linc Sonenshein, Tufts University, Boston, MA, USA Homepage

References

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