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
Sequences	Protein DNA Advanced_DNA
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

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)