RpoB

• Description: RNA polymerase beta subunit
  
  

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
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

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:

• Interactions:
  • RpoA-RpoB-RpoC PubMed, NusA-RpoB PubMed
  • SigA-(RpoB-RpoC) PubMed, SigB-(RpoB-RpoC)
  • SigD-(RpoB-RpoC), SigE-(RpoB-RpoC)
  • SigF-(RpoB-RpoC), SigG-(RpoB-RpoC)
  • SigH-(RpoB-RpoC), SigI-(RpoB-RpoC)
  • SigK-(RpoB-RpoC), SigL-(RpoB-RpoC)
  • SigM-(RpoB-RpoC), SigV-(RpoB-RpoC)
  • SigW-(RpoB-RpoC), SigX-(RpoB-RpoC)
  • SigY-(RpoB-RpoC), SigZ-(RpoB-RpoC)
  • Xpf-(RpoB-RpoC), YlaC-(RpoB-RpoC)
  • YvrI-RpoB PubMed,
  • Mfd-RpoB PubMed

• Localization: membrane associated PubMed

Database entries

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

• UniProt: P37870

• KEGG entry: [3]

• E.C. number: 2.7.7.6

Additional information

• subject to Clp-dependent proteolysis upon glucose starvation PubMed

Expression and regulation

• Operon: rpoB DBTBS

• Expression browser: rpoB PubMed

• Sigma factor: SigA PubMed

• 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:

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