DnaN

• Description: DNA polymerase III (beta subunit), beta clamp
  
  

Gene name	dnaN
Synonyms	dnaG, dnaK
Essential	yes PubMed
Product	DNA polymerase III (beta subunit), beta clamp
Function	DNA replication
MW, pI	41 kDa, 4.718
Gene length, protein length	1134 bp, 378 aa
Immediate neighbours	dnaA, yaaA
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: BSU00020

Phenotypes of a mutant

essential PubMed

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: Deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1) (according to Swiss-Prot)

• Protein family:

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions: DnaA-YabA-DnaN PubMed

• Localization: cytoplasm (according to Swiss-Prot), Nucleoid (Mid-cell) PubMed nucleoid (mid-cell spot) PubMed

Database entries

• Structure:

• Swiss prot entry: P05649

• KEGG entry: [3]

• E.C. number: 2.7.7.7

Expression and regulation

• Operon: dnaA-dnaN PubMed

• Sigma factor: SigA PubMed

• Regulation: negatively controlled by DnaA PubMed and Spo0A PubMed
  • repressed under conditions that trigger sporulation (Spo0A) PubMed

• Regulatory mechanism:
  • Spo0A: transcription repression PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

Labs working on this gene/protein

Philippe Noirot, Jouy-en-Josas, France homepage

References

1. Ogasawara et al. (1985) Structure and function of the region of the replication origin of the Bacillus subtilis chromosome. IV. Transcription of the oriC region and expression of DNA gyrase genes and other open reading frames.Nucl. Acids Res. 11: 2267-2279. PubMed
2. Fukuoka et al. (1990) Purification and characterization of an initiation protein for chromosomal replication, DnaA, in Bacillus subtilis. J. Biochem. 107: 732-739. PubMed
3. Molle et al. (2003) The Spo0A regulon of Bacillus subtilis.Mol. Microbiol. 50: 1683-1701. PubMed
4. Noirot-Gros et al. (2002) An expanded view of bacterial DNA replication. Proc. Natl. Acad. Sci. USA 99: 8342-8347. PubMed
5. Noirot-Gros et al. (2002) Functional dissection of YabA, a negative regulator of DNA replication initiation in Bacillus Title Proc. Natl. Acad. Sci. USA 103: 2368-2373. PubMed
6. Author1, Author2 & Author3 (year) Title Journal volume: page-page. PubMed