PyrAB

• Description: carbamoyl-phosphate synthetase (catalytic subunit)
  
  

Gene name	pyrAB
Synonyms
Essential	no
Product	carbamoyl-phosphate synthetase (catalytic subunit)
Function	pyrimidine biosynthesis
Gene expression levels in SubtiExpress: pyrAB
Metabolic function and regulation of this protein in SubtiPathways: pyrAB
MW, pI	117 kDa, 4.785
Gene length, protein length	3213 bp, 1071 aa
Immediate neighbours	pyrAA, pyrK
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, membrane proteins

This gene is a member of the following regulons

PyrR regulon

The gene

Basic information

• Locus tag: BSU15520

Database entries

• BsubCyc: BSU15520

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: 2 ATP + L-glutamine + HCO₃^- + H₂O = 2 ADP + phosphate + L-glutamate + carbamoyl phosphate (according to Swiss-Prot)

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

• Paralogous protein(s): CarB

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:

• Localization: membrane PubMed

Database entries

• BsubCyc: BSU15520

• Structure: 1JDB (from Escherichia coli, 49% identity, 69% similarity) PubMed

• UniProt: P25994

• KEGG entry: [3]

• E.C. number: 6.3.5.5

Expression and regulation

• Operon: pyrR-pyrP-pyrB-pyrC-pyrAA-pyrAB-pyrK-pyrD-pyrF-pyrE PubMed

• Expression browser: pyrAB PubMed

• Sigma factor: SigA PubMed

• Regulation:
  • induced in the absence of uridine nucleotides (PyrR) PubMed

• Regulatory mechanism:
  • PyrR: RNA switch, transcription termination/ antitermination (in the presence of uridine nucleotides: termination, in their absence: antitermination) PubMed

• Additional information:
  • number of protein molecules per cell (minimal medium with glucose and ammonium): 784 PubMed
  • number of protein molecules per cell (complex medium with amino acids, without glucose): 6966 PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Hannes Hahne, Susanne Wolff, Michael Hecker, Dörte Becher
From complementarity to comprehensiveness--targeting the membrane proteome of growing Bacillus subtilis by divergent approaches.
Proteomics: 2008, 8(19);4123-36
[PubMed:18763711] [WorldCat.org] [DOI] (I p)

R J Turner, Y Lu, R L Switzer
Regulation of the Bacillus subtilis pyrimidine biosynthetic (pyr) gene cluster by an autogenous transcriptional attenuation mechanism.
J Bacteriol: 1994, 176(12);3708-22
[PubMed:8206849] [WorldCat.org] [DOI] (P p)

C L Quinn, B T Stephenson, R L Switzer
Functional organization and nucleotide sequence of the Bacillus subtilis pyrimidine biosynthetic operon.
J Biol Chem: 1991, 266(14);9113-27
[PubMed:1709162] [WorldCat.org] (P p)