PurC

• Description: phosphoribosylaminoimidazole succinocarboxamide synthase
  
  

Gene name	purC
Synonyms
Essential	no
Product	phosphoribosylaminoimidazole succinocarboxamide synthase
Function	purine biosynthesis
Metabolic function and regulation of this protein in SubtiPathways: Purine synthesis, Nucleotides (regulation), Stress
MW, pI	27 kDa, 4.875
Gene length, protein length	723 bp, 241 aa
Immediate neighbours	purB, purS
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: BSU06450

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: ATP + 5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxylate + L-aspartate = ADP + phosphate + (S)-2-(5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxamido)succinate (according to Swiss-Prot)

• Protein family: SAICAR synthetase family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:

• Localization:

Database entries

• Structure: 1KUT (from Thermotoga maritima, 40% identity, 57% similarity) PubMed

• UniProt: P12046

• KEGG entry: [3]

• E.C. number: 6.3.2.6

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

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

• Additional information: the mRNA is very stable (half-life > 15 min) PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody: