SigB

• Description: RNA polymerase sigma factor SigB
  
  

Gene name	sigB
Synonyms	rpoF
Essential	no
Product	RNA polymerase sigma factor SigB
Function	general stress response
Metabolic function and regulation of this protein in SubtiPathways: Stress, Murein recycling
MW, pI	29 kDa, 5.418
Gene length, protein length	792 bp, 264 aa
Immediate neighbours	rsbW, rsbX
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

Categories containing this gene/protein

transcription, sigma factors and their control, general stress proteins (controlled by SigB)

This gene is a member of the following regulons

CcpA regulon, SigB regulon

The gene

Basic information

• Locus tag: BSU04730

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:

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

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions: SigB-RsbW PubMed, SigB-RpoB-RpoC

• Localization:

Database entries

• Structure:

• UniProt: P06574

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon:
  • rsbR-rsbS-rsbT-rsbU-rsbV-rsbW-sigB-rsbX PubMed
  • rsbV-rsbW-sigB-rsbX PubMed

• Sigma factor:
  • rsbR: SigA PubMed
  • rsbV: SigB PubMed

• Regulation:
  • rsbV: induced by stress (SigB) PubMed

• Additional information:

Biological materials

• Mutant: QB5344 (cat), available in the Stülke lab

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

Labs working on this gene/protein

• Bill Haldenwang, San Antonio, USA
• Chet Price, Davis, USA homepage

References

Control of SigB activity by protein-protein interactions

Oleg A Igoshin, Margaret S Brody, Chester W Price, Michael A Savageau
Distinctive topologies of partner-switching signaling networks correlate with their physiological roles.
J Mol Biol: 2007, 369(5);1333-52
[PubMed:17498739] [WorldCat.org] [DOI] (P p)

Tae-Jong Kim, Tatiana A Gaidenko, Chester W Price
In vivo phosphorylation of partner switching regulators correlates with stress transmission in the environmental signaling pathway of Bacillus subtilis.
J Bacteriol: 2004, 186(18);6124-32
[PubMed:15342582] [WorldCat.org] [DOI] (P p)

Tae-Jong Kim, Tatiana A Gaidenko, Chester W Price
A multicomponent protein complex mediates environmental stress signaling in Bacillus subtilis.
J Mol Biol: 2004, 341(1);135-50
[PubMed:15312768] [WorldCat.org] [DOI] (P p)

Olivier Delumeau, Richard J Lewis, Michael D Yudkin
Protein-protein interactions that regulate the energy stress activation of sigma(B) in Bacillus subtilis.
J Bacteriol: 2002, 184(20);5583-9
[PubMed:12270815] [WorldCat.org] [DOI] (P p)

M S Brody, K Vijay, C W Price
Catalytic function of an alpha/beta hydrolase is required for energy stress activation of the sigma(B) transcription factor in Bacillus subtilis.
J Bacteriol: 2001, 183(21);6422-8
[PubMed:11591687] [WorldCat.org] [DOI] (P p)

C Eymann, M Hecker
Induction of sigma(B)-dependent general stress genes by amino acid starvation in a spo0H mutant of Bacillus subtilis.
FEMS Microbiol Lett: 2001, 199(2);221-7
[PubMed:11377871] [WorldCat.org] [DOI] (P p)

A Dufour, U Voelker, A Voelker, W G Haldenwang
Relative levels and fractionation properties of Bacillus subtilis σ(B) and its regulators during balanced growth and stress.
J Bacteriol: 1996, 178(13);3701-9 sigma
[PubMed:8682769] [WorldCat.org] [DOI] (P p)

U Voelker, A Voelker, B Maul, M Hecker, A Dufour, W G Haldenwang
Separate mechanisms activate sigma B of Bacillus subtilis in response to environmental and metabolic stresses.
J Bacteriol: 1995, 177(13);3771-80
[PubMed:7601843] [WorldCat.org] [DOI] (P p)

A A Wise, C W Price
Four additional genes in the sigB operon of Bacillus subtilis that control activity of the general stress factor sigma B in response to environmental signals.
J Bacteriol: 1995, 177(1);123-33
[PubMed:8002610] [WorldCat.org] [DOI] (P p)

A K Benson, W G Haldenwang
Bacillus subtilis sigma B is regulated by a binding protein (RsbW) that blocks its association with core RNA polymerase.
Proc Natl Acad Sci U S A: 1993, 90(6);2330-4
[PubMed:8460143] [WorldCat.org] [DOI] (P p)