GuaC

• Description: GMP reductase
  
  

Gene name	guaC
Synonyms	yumD
Essential	no
Product	GMP reductase
Function	purine salvage and interconversion
Gene expression levels in SubtiExpress: guaC
Metabolic function and regulation of this protein in SubtiPathways: guaC
MW, pI	35 kDa, 6.078
Gene length, protein length	978 bp, 326 aa
Immediate neighbours	yuzG, paiB
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

CodY regulon, PurR regulon

The gene

Basic information

• Locus tag: BSU32130

Database entries

• BsubCyc: BSU32130

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: Inosine 5'-phosphate + NH₃ + NADP⁺ = guanosine 5'-phosphate + NADPH (according to Swiss-Prot)

• Protein family: GuaC type 2 subfamily (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

• BsubCyc: BSU32130

• Structure: 1YPF (from Bacillus anthracis, 84% identity, 91% similarity)

• UniProt: O05269

• KEGG entry: [3]

• E.C. number: 1.7.1.7

Expression and regulation

• Operon: guaC PubMed

• Expression browser: guaC PubMed

• Sigma factor:

• Regulation:
  • repressed in the presence of purine nucleotides (PurR) PubMed
  • activated during growth in the presence of branched chain amino acids (CodY) PubMed
  • expression activated by glucose (3.3 fold) PubMed

• Regulatory mechanism:
  • CodY: transcription activation PubMed
  • PurR: transcription repression (molecular inducer: PRPP) PubMed

• Additional information:
  • the mRNA is substantially stabilized upon depletion of RNase Y (the half-life of the mRNA increases from 3 to 20 min) PubMed
  • number of protein molecules per cell (minimal medium with glucose and ammonium): 143 PubMed
  • number of protein molecules per cell (complex medium with amino acids, without glucose): 178 PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody: