PyrR

• Description: transcriptional antiterminator of the pyr operon
  
  

Gene name	pyrR
Synonyms
Essential	no
Product	transcriptional antiterminator with minor uracil phosphoribosyltransferase activity
Function	regulation of pyrimidine biosynthesis
Metabolic function and regulation of this protein in SubtiPathways: Pyrimidines, Nucleotides (regulation)
MW, pI	20 kDa, 4.991
Gene length, protein length	543 bp, 181 aa
Immediate neighbours	ylyB, pyrP
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: BSU15470

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

Categories containing this gene/protein

biosynthesis/ acquisition of nucleotides, transcription factors and their control, RNA binding regulators

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: UMP + diphosphate = uracil + 5-phospho-alpha-D-ribose 1-diphosphate (according to Swiss-Prot)

• Protein family: PyrR subfamily (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions: PyrR-PyrR PubMed

• Localization:

Database entries

• Structure: 1A3C (dimeric form)

• UniProt: P39765

• KEGG entry: [3]

• E.C. number: 2.4.2.9

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: