PurN

• Description: phosphoribosylglycinamide formyltransferase, irreversible
  
  

Gene name	purN
Synonyms
Essential	no
Product	phosphoribosylglycinamide formyltransferase
Function	purine biosynthesis
Gene expression levels in SubtiExpress: purN
Metabolic function and regulation of this protein in SubtiPathways: purN
MW, pI	21 kDa, 6.182
Gene length, protein length	585 bp, 195 aa
Immediate neighbours	purM, purH
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

biosynthesis/ acquisition of nucleotides

This gene is a member of the following regulons

G-box, PurR regulon

The gene

Basic information

• Locus tag: BSU06510

Database entries

• BsubCyc: BSU06510

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: 10-formyltetrahydrofolate + N(1)-(5-phospho-D-ribosyl)glycinamide = tetrahydrofolate + N(2)-formyl-N(1)-(5-phospho-D-ribosyl)glycinamide (according to Swiss-Prot)

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

• Paralogous protein(s): YkkE

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:

• Localization:

Database entries

• BsubCyc: BSU06510

• Structure: 3P9X (from B. halodurans, 51% identity, 70% similarity)

• UniProt: P12040

• KEGG entry: [3]

• E.C. number: 2.1.2.2

Expression and regulation

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

• Expression browser: purN 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:
  • number of protein molecules per cell (minimal medium with glucose and ammonium): 146 PubMed
  • number of protein molecules per cell (minimal medium with glucose and ammonium, exponential phase): 800 PubMed
  • number of protein molecules per cell (minimal medium with glucose and ammonium, early stationary phase after glucose exhaustion): 493 PubMed
  • number of protein molecules per cell (minimal medium with glucose and ammonium, late stationary phase after glucose exhaustion): 664 PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody: