QoxA

• Description: cytochrome aa3 quinol oxidase (subunit II)
  
  

Gene name	qoxA
Synonyms	ipa-37d
Essential	no
Product	cytochrome aa3 quinol oxidase (subunit II)
Function	respiration
MW, pI	36 kDa, 4.796
Gene length, protein length	963 bp, 321 aa
Immediate neighbours	qoxB, ywzA
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

The gene

Basic information

• Locus tag: BSU38170

Database entries

• DBTBS entry: no entry

• SubtiList entry: [1]

Categories containing this gene/protein

respiration, membrane proteins

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: Ubiquinol-8 + O₂ = Ubiquinone-8 + H₂O (according to Swiss-Prot)

• Protein family: cytochrome c oxidase subunit 2 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), membrane PubMed

Database entries

• Structure:

• UniProt: P34957

• KEGG entry: [2]

• E.C. number:

Expression and regulation

• Operon: qoxA-qoxB-qoxC-qoxD PubMed

• 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:

References

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 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)