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  • Description: DNA polymerase III (beta subunit), beta clamp, part of the replisome, also involved in DNA mismatch repair, inhibitor of DnaA oligomerization

Gene name dnaN
Synonyms dnaG, dnaK
Essential yes PubMed
Product DNA polymerase III
(beta subunit), beta clamp
Function DNA replication, DNA repair
Gene expression levels in SubtiExpress: DnaN
Interactions involving this protein in SubtInteract: DnaN
MW, pI 41 kDa, 4.718
Gene length, protein length 1134 bp, 378 aa
Immediate neighbours dnaA, yaaA
Sequences Protein DNA DNA_with_flanks
Genetic context
DnaA dnaN yaaA recF yaaB gyrB context.png
This image was kindly provided by SubtiList
Expression at a glance   PubMed
DnaN expression.png















Categories containing this gene/protein

DNA replication, essential genes

This gene is a member of the following regulons

Spo0A regulon

The gene

Basic information

  • Locus tag: BSU00020

Phenotypes of a mutant

essential PubMed

Database entries

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

Additional information

The protein

Basic information/ Evolution

  • Catalyzed reaction/ biological activity:
    • DnaN overexpression or release from the replisome decreases association of YabA with oriC, increases association of DnaA with oriC PubMed
    • Deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1) (according to Swiss-Prot)
    • recruits MutS to the site of DNA replication (replisome) PubMed
    • required for bacteriophage SPP1 replication PubMed
    • inhibits oligomerization and helix formation of DnaA PubMed
  • Protein family:
  • Paralogous protein(s):

Extended information on the protein

  • Kinetic information:
  • Domains:
  • Modification:
  • Cofactor(s):
  • Effectors of protein activity:

Database entries

  • Structure:
  • KEGG entry: [3]

Additional information

Expression and regulation

  • Regulatory mechanism:
  • Additional information:

Biological materials

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

Labs working on this gene/protein

Philippe Noirot, Jouy-en-Josas, France homepage

Your additional remarks

References

Reviews

Justin S Lenhart, Jeremy W Schroeder, Brian W Walsh, Lyle A Simmons
DNA repair and genome maintenance in Bacillus subtilis.
Microbiol Mol Biol Rev: 2012, 76(3);530-64
[PubMed:22933559] [WorldCat.org] [DOI] (I p)

Tsutomu Katayama, Shogo Ozaki, Kenji Keyamura, Kazuyuki Fujimitsu
Regulation of the replication cycle: conserved and diverse regulatory systems for DnaA and oriC.
Nat Rev Microbiol: 2010, 8(3);163-70
[PubMed:20157337] [WorldCat.org] [DOI] (I p)

Original publications