qcrB [Mon Aug 31 2015 13:55:17 GMT+0200 (CEST)]

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

Locus: BSU22550

Isoelectric point: 7.44

Molecular weight: 25.00 kDa

Function: respiration

Product: menaquinol:cytochrome c oxidoreductase (cytochrome b subunit)

Essential: no

Synonyms: bfcB, petB

Genomic Context

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Categories containing this gene/protein

• Metabolism → Electron transport and ATP synthesis → Respiration → Respiration/ other
• Groups of genes → Membrane proteins

Syns: bfcB, petB

Categories containing this gene/protein

• respiration, membrane proteins

This gene is a member of the following regulons

• AbrB regulon, ResD regulon

The protein

Protein family

• peptidase M20A family (according to Swiss-Prot)

Localization

• cell membrane PubMed

Interactions

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

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

References

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