PurM

• Description: phosphoribosylaminoimidazole synthetase
  
  

Gene name	purM
Synonyms
Essential	no
Product	phosphoribosylaminoimidazole synthetase
Function	purine biosynthesis
Gene expression levels in SubtiExpress: purM
Metabolic function and regulation of this protein in SubtiPathways: Purine synthesis, Nucleotides (regulation)
MW, pI	36 kDa, 4.586
Gene length, protein length	1038 bp, 346 aa
Immediate neighbours	purF, purN
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

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: BSU06500

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: ATP + 2-(formamido)-N(1)-(5-phospho-D-ribosyl)acetamidine = ADP + phosphate + 5-amino-1-(5-phospho-D-ribosyl)imidazole (according to Swiss-Prot)

• Protein family: AIR synthase 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:
  • cytoplasm (according to Swiss-Prot)

Database entries

• Structure: 2BTU (from Bacillus anthracis, 64% identity, 78% similarity)

• UniProt: P12043

• KEGG entry: [3]

• E.C. number: 6.3.3.1

Expression and regulation

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

• Expression browser: purM 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:

Biological materials

• Mutant:
  • 1A601 ( purM::erm), PubMed, available at BGSC

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody: