SigB

• Description: RNA polymerase sigma factor SigB
  
  

Gene name	sigB
Synonyms	rpoF
Essential	no
Product	RNA polymerase sigma factor SigB
Function	general stress response
Gene expression levels in SubtiExpress: sigB
Interactions involving this protein in SubtInteract: SigB
Metabolic function and regulation of this protein in SubtiPathways: sigB
MW, pI	29 kDa, 5.418
Gene length, protein length	792 bp, 264 aa
Immediate neighbours	rsbW, rsbX
Sequences	Protein DNA DNA_with_flanks
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

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

• BsubCyc: BSU04730

• DBTBS entry: [1]

• SubtiList entry: [2]

Additional information

• mutations in mtrB, sigB, rpoB, and rpoC allow B. subtilis to grow with 4-fluorotryptophan rather than with tryptophan as a canonical amino acid of the genetic code PubMed

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:

• Cofactors:

• Effectors of protein activity:

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

• Localization:

Database entries

• BsubCyc: BSU04730

• 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

• Expression browser: sigB PubMed

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

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

• Additional information:
  • number of protein molecules per cell (minimal medium with glucose and ammonium): 52 PubMed

Biological materials

• Mutant: QB5344 (cat), available in the Stülke lab
  • 1A675 ( sigB::cat), PubMed, available at BGSC
  • 1A777 ( sigB::cat), PubMed, available at BGSC
  • 1A780 ( sigB::spec), PubMed, available at BGSC

• 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

Identification of the SigB regulon

Priyanka Nannapaneni, Falk Hertwig, Maren Depke, Michael Hecker, Ulrike Mäder, Uwe Völker, Leif Steil, Sacha A F T van Hijum
Defining the structure of the general stress regulon of Bacillus subtilis using targeted microarray analysis and random forest classification.
Microbiology (Reading): 2012, 158(Pt 3);696-707
[PubMed:22174379] [WorldCat.org] [DOI] (I p)

J D Helmann, M F Wu, P A Kobel, F J Gamo, M Wilson, M M Morshedi, M Navre, C Paddon
Global transcriptional response of Bacillus subtilis to heat shock.
J Bacteriol: 2001, 183(24);7318-28
[PubMed:11717291] [WorldCat.org] [DOI] (P p)

A Petersohn, M Brigulla, S Haas, J D Hoheisel, U Völker, M Hecker
Global analysis of the general stress response of Bacillus subtilis.
J Bacteriol: 2001, 183(19);5617-31
[PubMed:11544224] [WorldCat.org] [DOI] (P p)

C W Price, P Fawcett, H Cérémonie, N Su, C K Murphy, P Youngman
Genome-wide analysis of the general stress response in Bacillus subtilis.
Mol Microbiol: 2001, 41(4);757-74
[PubMed:11532142] [WorldCat.org] [DOI] (P p)

A Petersohn, J Bernhardt, U Gerth, D Höper, T Koburger, U Völker, M Hecker
Identification of sigma(B)-dependent genes in Bacillus subtilis using a promoter consensus-directed search and oligonucleotide hybridization.
J Bacteriol: 1999, 181(18);5718-24
[PubMed:10482513] [WorldCat.org] [DOI] (P p)

Anja Petersohn, Haike Antelmann, Ulf Gerth, Michael Hecker
Identification and transcriptional analysis of new members of the sigmaB regulon in Bacillus subtilis.
Microbiology (Reading): 1999, 145 ( Pt 4);869-880
[PubMed:10220166] [WorldCat.org] [DOI] (P p)