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: pupG
MW, pI	28 kDa, 4.86
Gene length, protein length	813 bp, 271 aa
Immediate neighbours	dacF, drm
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, phosphoproteins

This gene is a member of the following regulons

CcpA regulon

The gene

Basic information

• Locus tag: BSU23490

Database entries

• BsubCyc: BSU23490

• 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

• BsubCyc: BSU23490

• 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:
  • number of protein molecules per cell (minimal medium with glucose and ammonium): 867 PubMed
  • number of protein molecules per cell (complex medium with amino acids, without glucose): 1624 PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody: