PupG

• Description: purine nucleoside phosphorylase
  
  

Gene name	pupG
Synonyms	punA, pnp, yqkO
Essential	no
Product	purine nucleoside phosphorylase
Function	purine salvage and interconversion
Gene expression levels in SubtiExpress: pupG
Metabolic function and regulation of this protein in SubtiPathways: Purine salvage, Nucleoside catabolism, Nucleotides (regulation)
MW, pI	28 kDa, 4.86
Gene length, protein length	813 bp, 271 aa
Immediate neighbours	dacF, drm
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, phosphoproteins

This gene is a member of the following regulons

CcpA regulon

The gene

Basic information

• Locus tag: BSU23490

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: Purine nucleoside + phosphate = purine + alpha-D-ribose 1-phosphate (according to Swiss-Prot) RNA(n+1) + phosphate = RNA(n) + a nucleoside diphosphate (according to Swiss-Prot)

• Protein family: PNP/MTAP phosphorylase family (according to Swiss-Prot) polyribonucleotide nucleotidyltransferase family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification: phosphorylation on Ser-28 PubMed

• Cofactor(s):

• Effectors of protein activity:

• Interactions:

• Localization: secreted (according to Swiss-Prot)

Database entries

• Structure:

• UniProt: P46354

• KEGG entry: [3]

• E.C. number: 2.4.2.1, 2.7.7.8

Expression and regulation

• Operon: drm-pupG PubMed

• Expression browser: pupG PubMed

• Sigma factor: SigA PubMed

• Regulation:
  • induced in the presence of nucleosides (deoxyribose 5-phosphate and ribose 5-phosphate act as molecular inducers) PubMed
  • subject to carbon catabolite repression (CcpA) PubMed

• Regulatory mechanism:
  • CcpA: transcription repression PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody: