QoxB

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  • Description: cytochrome aa3 quinol oxidase (subunit I)

Gene name qoxB
Synonyms ipa-38d
Essential no
Product cytochrome aa3 quinol oxidase (subunit I)
Function respiration
Gene expression levels in SubtiExpress: qoxB
MW, pI 73 kDa, 8.848
Gene length, protein length 1947 bp, 649 aa
Immediate neighbours qoxC, qoxA
Sequences Protein DNA DNA_with_flanks
Genetic context
QoxB context.gif
This image was kindly provided by SubtiList
Expression at a glance   PubMed
QoxB expression.png















Categories containing this gene/protein

respiration, membrane proteins

This gene is a member of the following regulons

stringent response

The gene

Basic information

  • Locus tag: BSU38160

Phenotypes of a mutant

  • inactivation of qoxB restores beta-lactam resistance in a sigM mutant PubMed

Database entries

  • DBTBS entry: no entry
  • SubtiList entry: [1]

Additional information

  • A mutation was found in this gene after evolution under relexed selection for sporulation PubMed

The protein

Basic information/ Evolution

  • Catalyzed reaction/ biological activity: Ubiquinol-8 + O2 = Ubiquinone-8 + H2O (according to Swiss-Prot)
  • Protein family: heme-copper respiratory oxidase family (according to Swiss-Prot)
  • Paralogous protein(s): CtaD

Extended information on the protein

  • Kinetic information:
  • Domains:
  • Modification:
  • Effectors of protein activity:

Database entries

  • Structure:
  • KEGG entry: [2]
  • E.C. number:

Additional information

Expression and regulation

  • Sigma factor:
  • Regulation:
    • RelA dependent downregulation (Class I) during stringent response PubMed
  • Regulatory mechanism:
  • Additional information:

Biological materials

  • Mutant:
  • Expression vector:
  • lacZ fusion:
  • GFP fusion:
  • two-hybrid system:
  • Antibody:

Labs working on this gene/protein

Your additional remarks

References

Yun Luo, John D Helmann
Analysis of the role of Bacillus subtilis σ(M) in β-lactam resistance reveals an essential role for c-di-AMP in peptidoglycan homeostasis.
Mol Microbiol: 2012, 83(3);623-39
[PubMed:22211522] [WorldCat.org] [DOI] (I p)

Christopher T Brown, Laura K Fishwick, Binna M Chokshi, Marissa A Cuff, Jay M Jackson, Travis Oglesby, Alison T Rioux, Enrique Rodriguez, Gregory S Stupp, Austin H Trupp, James S Woollcombe-Clarke, Tracy N Wright, William J Zaragoza, Jennifer C Drew, Eric W Triplett, Wayne L Nicholson
Whole-genome sequencing and phenotypic analysis of Bacillus subtilis mutants following evolution under conditions of relaxed selection for sporulation.
Appl Environ Microbiol: 2011, 77(19);6867-77
[PubMed:21821766] [WorldCat.org] [DOI] (I p)

Sophia M Yi, Kuppala V Narasimhulu, Rimma I Samoilova, Robert B Gennis, Sergei A Dikanov
Characterization of the semiquinone radical stabilized by the cytochrome aa3-600 menaquinol oxidase of Bacillus subtilis.
J Biol Chem: 2010, 285(24);18241-51
[PubMed:20351111] [WorldCat.org] [DOI] (I p)

Hannes Hahne, Susanne Wolff, Michael Hecker, Dörte Becher
From complementarity to comprehensiveness--targeting the membrane proteome of growing Bacillus subtilis by divergent approaches.
Proteomics: 2008, 8(19);4123-36
[PubMed:18763711] [WorldCat.org] [DOI] (I p)

L Winstedt, C von Wachenfeldt
Terminal oxidases of Bacillus subtilis strain 168: one quinol oxidase, cytochrome aa(3) or cytochrome bd, is required for aerobic growth.
J Bacteriol: 2000, 182(23);6557-64
[PubMed:11073895] [WorldCat.org] [DOI] (P p)

N R Mattatall, J Jazairi, B C Hill
Characterization of YpmQ, an accessory protein required for the expression of cytochrome c oxidase in Bacillus subtilis.
J Biol Chem: 2000, 275(37);28802-9
[PubMed:10837475] [WorldCat.org] [DOI] (P p)

N Azarkina, S Siletsky, V Borisov, C von Wachenfeldt, L Hederstedt, A A Konstantinov
A cytochrome bb'-type quinol oxidase in Bacillus subtilis strain 168.
J Biol Chem: 1999, 274(46);32810-7
[PubMed:10551842] [WorldCat.org] [DOI] (P p)

M Santana, F Kunst, M F Hullo, G Rapoport, A Danchin, P Glaser
Molecular cloning, sequencing, and physiological characterization of the qox operon from Bacillus subtilis encoding the aa3-600 quinol oxidase.
J Biol Chem: 1992, 267(15);10225-31
[PubMed:1316894] [WorldCat.org] (P p)