PurQ

• Description: phosphoribosylformylglycinamidine synthase
  
  

Gene name	purQ
Synonyms
Essential	no
Product	phosphoribosylformylglycinamidine synthase
Function	purine biosynthesis
MW, pI	24 kDa, 4.627
Gene length, protein length	681 bp, 227 aa
Immediate neighbours	purS, purL
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

The gene

Basic information

• Locus tag:

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: ATP + N(2)-formyl-N(1)-(5-phospho-D-ribosyl)glycinamide + L-glutamine + H₂O = ADP + phosphate + 2-(formamido)-N(1)-(5-phospho-D-ribosyl)acetamidine + L-glutamate (according to Swiss-Prot)

• Protein family:

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions: PurS-PurQ-PurL PubMed

• Localization: cytoplasm (according to Swiss-Prot)

Database entries

• Structure:

• Swiss prot entry: P12041

• KEGG entry: BSU06470

• E.C. number: 6.3.5.3

Additional information

• subject to Clp-dependent proteolysis upon glucose starvation PubMed

Expression and regulation

• Operon: purE-purK-purB-purC-purS-purQ-purL-purF-purM-purN-purH-purD PubMed

• Sigma factor: SigA PubMed

• Regulation:
  • repressed in the presence of adenine or adenosine(PurR) PubMed
  • repressed in the presence of guanine(G-box) PubMed
  • expression activated by glucose (4.4 fold) PubMed

• Regulatory mechanism:
  • PurR: transcription repression (molecular inducer: PRPP) PubMed
  • G-box: transcription termination/ antitermination (riboswitch) PubMed1 PubMed2

• Additional information: subject to Clp-dependent proteolysis upon glucose starvation PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

1. Blencke et al. (2003) Transcriptional profiling of gene expression in response to glucose in Bacillus subtilis: regulation of the central metabolic pathways. Metab Eng. 5: 133-149 PubMed
2. Gerth et al. (2008) Clp-dependent proteolysis down-regulates central metabolic pathways in glucose-starved Bacillus subtilis. J Bacteriol 190:321-331 PubMed
3. Author1, Author2 & Author3 (year) Title Journal volume: page-page. PubMed