QcrB

• Description: menaquinol:cytochrome c oxidoreductase (cytochrome b subunit), component of the cytochrome bc complex
  
  

Gene name	qcrB
Synonyms	bfcB, petB
Essential	no
Product	menaquinol:cytochrome c oxidoreductase (cytochrome b subunit)
Function	respiration
Gene expression levels in SubtiExpress: qcrB
Interactions involving this protein in SubtInteract: QcrB
MW, pI	25 kDa, 7.441
Gene length, protein length	672 bp, 224 aa
Immediate neighbours	qcrC, qcrA
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

respiration, membrane proteins

This gene is a member of the following regulons

AbrB regulon, ResD regulon

The gene

Basic information

• Locus tag: BSU22550

Database entries

• BsubCyc: BSU22550

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:

• Protein family: peptidase M20A family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:
  • part of a respiratory supercomplex PubMed
  • QcrA-QcrB-QcrC PubMed

• Localization:
  • cell membrane PubMed

Database entries

• BsubCyc: BSU22550

• Structure:

• UniProt: P46912

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon: qcrA-qcrB-qcrC PubMed

• Expression browser: qcrB PubMed

• Sigma factor: SigA PubMed

• Regulation:
  • repressed by casamino acids PubMed
  • induced by oxygen limitation (ResD) PubMed
  • repressed by glucose (CcpA) PubMed

• Regulatory mechanism:
  • ResD: transcription activation PubMed
  • CcpA: transcription repression PubMed
  • AbrB: transcription repression PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Pedro M F Sousa, Marco A M Videira, Filipe A S Santos, Brian L Hood, Thomas P Conrads, Ana M P Melo
The bc:caa3 supercomplexes from the Gram positive bacterium Bacillus subtilis respiratory chain: a megacomplex organization?
Arch Biochem Biophys: 2013, 537(1);153-60
[PubMed:23880299] [WorldCat.org] [DOI] (I p)

Onuma Chumsakul, Hiroki Takahashi, Taku Oshima, Takahiro Hishimoto, Shigehiko Kanaya, Naotake Ogasawara, Shu Ishikawa
Genome-wide binding profiles of the Bacillus subtilis transition state regulator AbrB and its homolog Abh reveals their interactive role in transcriptional regulation.
Nucleic Acids Res: 2011, 39(2);414-28
[PubMed:20817675] [WorldCat.org] [DOI] (I p)

Hans-Matti Blencke, Georg Homuth, Holger Ludwig, Ulrike Mäder, Michael Hecker, Jörg Stülke
Transcriptional profiling of gene expression in response to glucose in Bacillus subtilis: regulation of the central metabolic pathways.
Metab Eng: 2003, 5(2);133-49
[PubMed:12850135] [WorldCat.org] [DOI] (P p)

Ulrike Mäder, Georg Homuth, Christian Scharf, Knut Büttner, Rüdiger Bode, Michael Hecker
Transcriptome and proteome analysis of Bacillus subtilis gene expression modulated by amino acid availability.
J Bacteriol: 2002, 184(15);4288-95
[PubMed:12107147] [WorldCat.org] [DOI] (P p)

G Sun, E Sharkova, R Chesnut, S Birkey, M F Duggan, A Sorokin, P Pujic, S D Ehrlich, F M Hulett
Regulators of aerobic and anaerobic respiration in Bacillus subtilis.
J Bacteriol: 1996, 178(5);1374-85
[PubMed:8631715] [WorldCat.org] [DOI] (P p)

J Yu, L Hederstedt, P J Piggot
The cytochrome bc complex (menaquinone:cytochrome c reductase) in Bacillus subtilis has a nontraditional subunit organization.
J Bacteriol: 1995, 177(23);6751-60
[PubMed:7592464] [WorldCat.org] [DOI] (P p)