RpoB

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Gene name rpoB
Synonyms
Essential yes PubMed
Product RNA polymerase beta subunit
Function transcription
Gene expression levels in SubtiExpress: rpoB
Interactions involving this protein in SubtInteract: RpoB
MW, pI 133 kDa, 4.731
Gene length, protein length 3579 bp, 1193 aa
Immediate neighbours ybxB, rpoC
Sequences Protein DNA Advanced_DNA
Genetic context
RpoB context.gif
This image was kindly provided by SubtiList
Expression at a glance   PubMed
RpoB expression.png
























Categories containing this gene/protein

transcription, essential genes, membrane proteins, phosphoproteins

This gene is a member of the following regulons

stringent response

The gene

Basic information

  • Locus tag: BSU01070

Phenotypes of a mutant

essential PubMed

Database entries

  • DBTBS entry: [1]
  • SubtiList entry: [2]

Additional information

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


The protein

Basic information/ Evolution

  • Catalyzed reaction/ biological activity: Nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1) (according to Swiss-Prot)
  • Protein family: RNA polymerase beta chain family (according to Swiss-Prot)
  • Paralogous protein(s):

Extended information on the protein

  • Kinetic information:
  • Domains:
  • Modification:
    • phosphorylated on (Arg-312 OR Arg-313), Arg-539, (Arg-693 OR Arg-694), Arg-827, and Arg-1106 PubMed
  • Cofactor(s):
  • Effectors of protein activity:

Database entries

  • Structure:
    • 3MLQ (RNA polymerase interacting domain of Thermus thermophilus Mfd with the Thermus aquaticus RpoB beta1 domain) PubMed
  • KEGG entry: [3]

Additional information

  • subject to Clp-dependent proteolysis upon glucose starvation PubMed

Expression and regulation

  • Regulation:
    • RelA dependent downregulation (Class I) during stringent response PubMed
  • Regulatory mechanism:
  • Additional information:
    • subject to Clp-dependent proteolysis upon glucose starvation PubMed
    • The mRNA has a long 5' leader region. This may indicate RNA-based regulation PubMed

Biological materials

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

Labs working on this gene/protein

Your additional remarks

References

Reviews

Lakshminarayan M Iyer, L Aravind
Insights from the architecture of the bacterial transcription apparatus.
J Struct Biol: 2012, 179(3);299-319
[PubMed:22210308] [WorldCat.org] [DOI] (I p)

Original publications

Additional publications: PubMed