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
MW, pI	25 kDa, 7.441
Gene length, protein length	672 bp, 224 aa
Immediate neighbours	qcrC, qcrA
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

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

Expression

Database entries

• 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:

• Localization: cell membrane (according to Swiss-Prot)

Database entries

• Structure:

• UniProt: P46912

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon: qcrA-qcrB-qcrC 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

Additional publications: PubMed