PurQ

• Description: phosphoribosylformylglycinamidine synthase
  
  

Gene name	purQ
Synonyms
Essential	no
Product	phosphoribosylformylglycinamidine synthase
Function	purine biosynthesis
Interactions involving this protein in SubtInteract: PurQ
Metabolic function and regulation of this protein in SubtiPathways: Purine synthesis, Nucleotides (regulation)
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

Categories containing this gene/protein

biosynthesis/ acquisition of nucleotides

This gene is a member of the following regulons

G-box, PurR regulon

The gene

Basic information

• Locus tag: BSU06470

Expression

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:

• UniProt: P12041

• KEGG entry: [3]

• 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 purine nucleotides (PurR) PubMed
  • 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 PubMed
  • 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: