PurR

• Description: transcription repressor of the pur operon
  
  

Gene name	purR
Synonyms	yabI
Essential	no
Product	transcription repressor of the pur operon
Function	regulation of purine biosynthesis
Gene expression levels in SubtiExpress: purR
Interactions involving this protein in SubtInteract: PurR
Metabolic function and regulation of this protein in SubtiPathways: Nucleotides (regulation), Ala, Gly, Ser
MW, pI	31 kDa, 5.771
Gene length, protein length	855 bp, 285 aa
Immediate neighbours	ispE, yabJ
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

Categories containing this gene/protein

biosynthesis/ acquisition of nucleotides, transcription factors and their control

This gene is a member of the following regulons

PurR regulon

The gene

Basic information

• Locus tag: BSU00470

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Biological activity: transcriptional repressor of purine biosynthetic operons

• Protein family: purine/pyrimidine phosphoribosyltransferase family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity: PRPP acts as inducer, binding results in release of PurR from the operator PubMed

• Interactions:
  • PurR-Prs

• Localization:

Database entries

• Structure: 1P4A, 1P4A (complex with PRPP) NCBI PubMed

• UniProt: P37551

• KEGG entry: [3]

• E.C. number:

Additional information

requires YabJ for in vivo activity

Expression and regulation

• Operon: purR-yabJ PubMed

• Expression browser: purR PubMed

• Sigma factor:

• Regulation: negative autoregulation, induction in the presence of PRPP PubMed
  • repressed in the presence of purine nucleotides (PurR) PubMed

• Regulatory mechanism: repression by PurR PubMed
  • PurR: transcription repression PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Shuobo Shi, Tao Chen, Zhigang Zhang, Xun Chen, Xueming Zhao
Transcriptome analysis guided metabolic engineering of Bacillus subtilis for riboflavin production.
Metab Eng: 2009, 11(4-5);243-52
[PubMed:19446032] [WorldCat.org] [DOI] (I p)

Per Nygaard, Hans H Saxild
The purine efflux pump PbuE in Bacillus subtilis modulates expression of the PurR and G-box (XptR) regulons by adjusting the purine base pool size.
J Bacteriol: 2005, 187(2);791-4
[PubMed:15629952] [WorldCat.org] [DOI] (P p)

Pekka Rappu, Terhi Pullinen, Pekka Mäntsälä
In vivo effect of mutations at the PRPP binding site of the Bacillus subtilis purine repressor.
J Bacteriol: 2003, 185(22);6728-31
[PubMed:14594850] [WorldCat.org] [DOI] (P p)

Aloke Kumar Bera, Jianghai Zhu, Howard Zalkin, Janet L Smith
Functional dissection of the Bacillus subtilis pur operator site.
J Bacteriol: 2003, 185(14);4099-109
[PubMed:12837784] [WorldCat.org] [DOI] (P p)

Sangita C Sinha, Joseph Krahn, Byung Sik Shin, Diana R Tomchick, Howard Zalkin, Janet L Smith
The purine repressor of Bacillus subtilis: a novel combination of domains adapted for transcription regulation.
J Bacteriol: 2003, 185(14);4087-98
[PubMed:12837783] [WorldCat.org] [DOI] (P p)

H H Saxild, K Brunstedt, K I Nielsen, H Jarmer, P Nygaard
Definition of the Bacillus subtilis PurR operator using genetic and bioinformatic tools and expansion of the PurR regulon with glyA, guaC, pbuG, xpt-pbuX, yqhZ-folD, and pbuO.
J Bacteriol: 2001, 183(21);6175-83
[PubMed:11591660] [WorldCat.org] [DOI] (P p)

M Weng, H Zalkin
Mutations in the Bacillus subtilis purine repressor that perturb PRPP effector function in vitro and in vivo.
Curr Microbiol: 2000, 41(1);56-9
[PubMed:10919400] [WorldCat.org] [DOI] (P p)

P Rappu, B S Shin, H Zalkin, P Mäntsälä
A role for a highly conserved protein of unknown function in regulation of Bacillus subtilis purA by the purine repressor.
J Bacteriol: 1999, 181(12);3810-5
[PubMed:10368157] [WorldCat.org] [DOI] (P p)

M Weng, P L Nagy, H Zalkin
Identification of the Bacillus subtilis pur operon repressor.
Proc Natl Acad Sci U S A: 1995, 92(16);7455-9
[PubMed:7638212] [WorldCat.org] [DOI] (P p)