PyrAB

• Description: carbamoyl-phosphate synthetase (catalytic subunit)
  
  

Gene name	pyrAB
Synonyms
Essential	no
Product	carbamoyl-phosphate synthetase (catalytic subunit)
Function	pyrimidine biosynthesis
Metabolic function and regulation of this protein in SubtiPathways: Pyrimidines, Nucleotides (regulation)
MW, pI	117 kDa, 4.785
Gene length, protein length	3213 bp, 1071 aa
Immediate neighbours	pyrAA, pyrK
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

The gene

Basic information

• Locus tag: BSU15520

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

Categories containing this gene/protein

biosynthesis/ acquisition of nucleotides, membrane proteins

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

• 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

• 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:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody: