CodY

• Description: regulation of a large regulon (more than 100 genes and operons) in response to branched-chain amino acid limitation
  
  

Gene name	codY
Synonyms
Essential	no
Product	transcriptional pleiotropic repressor
Function	regulation of a large regulon in response to branched-chain amino acid limitation to the presence of branched-chain amino acids
Gene expression levels in SubtiExpress: codY branched-chain amino acid limitation to the presence of branched-chain amino acids
Interactions involving this protein in SubtInteract: CodY
Metabolic function and regulation of this protein in SubtiPathways: Alternative nitrogen sources, Lipid synthesis, Protein secretion
MW, pI	28 kDa, 4.75
Gene length, protein length	777 bp, 259 aa
Immediate neighbours	clpY, flgB
Sequences	Protein DNA DNA_with_flanks
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

Categories containing this gene/protein

transcription factors and their control, regulators of core metabolism, phosphoproteins

This gene is a member of the following regulons

CodY regulon

The gene

Basic information

• Locus tag: BSU16170

Phenotypes of a mutant

• no swarming motility on B medium. PubMed
• the mutation suppresses the mucoid phenotype of motA or motB mutants due to loss of DegU phosphorylation and concomitant reduced expression of the capB-capC-capA-capE operon PubMed
• inactivation of codY suppresses the requirement of a relA yjbM ywaC triple mutant for branched chain amino acids, methionine and threonine PubMed

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:

• Protein family: codY family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains: contains a GAF domain (ligand binding domain)

• Modification: phosphorylation on Ser-215 PubMed

• Cofactors:

• Effectors of protein activity: GTP and branched chained amino acids (BCAA) increase the affinity of CodY for its DNA target sequences PubMed

• Interactions:
  • active as dimer (according to PubMed)
  • CcpA-CodY PubMed
  • RpoA-CodY PubMed

• Localization: cytoplasm (according to Swiss-Prot)

Database entries

• Structure: 2B0L (C-terminal DNA-binding domain), 2GX5 (N-terminal Gaf domain)

• UniProt: P39779

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon: codV-clpQ-clpY-codY PubMed

• Expression browser: codY PubMed

• Sigma factor: SigA PubMed

• Regulation:
  • repressed during growth in the presence of branched chain amino acids (CodY) PubMed

• Regulatory mechanism:
  • CodY: transcription repression PubMed

• Additional information:
  • the intracellular concentration of CodY is about 2.5 myM (according to PubMed)

Biological materials

• Mutant:
  • GP566, available in Stülke lab
  • a codY::erm mutant is available in Linc Sonenshein's lab

• Expression vector:
  • for expression, purification in E. coli with N-terminal His-tag, in pWH844: pGP245, available in Stülke lab

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

Labs working on this gene/protein

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

Tony Wilkinson, York University, U.K. homepage

Oscar Kuipers, University of Groningen, The Netherlands Homepage

References

Reviews

Sabine Brantl, Andreas Licht
Characterisation of Bacillus subtilis transcriptional regulators involved in metabolic processes.
Curr Protein Pept Sci: 2010, 11(4);274-91
[PubMed:20408793] [WorldCat.org] [DOI] (I p)

Abraham L Sonenshein
Control of key metabolic intersections in Bacillus subtilis.
Nat Rev Microbiol: 2007, 5(12);917-27
[PubMed:17982469] [WorldCat.org] [DOI] (I p)

Abraham L Sonenshein
CodY, a global regulator of stationary phase and virulence in Gram-positive bacteria.
Curr Opin Microbiol: 2005, 8(2);203-7
[PubMed:15802253] [WorldCat.org] [DOI] (P p)