DnaX

• Description: DNA polymerase III (gamma and tau subunits) part of the replisome
  
  

Gene name	dnaX
Synonyms	dnaH, dna-8132
Essential	yes PubMed
Product	DNA polymerase III (gamma and tau subunits)
Function	DNA replication
MW, pI	62 kDa, 5.488
Gene length, protein length	1689 bp, 563 aa
Immediate neighbours	scr, yaaK
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: BSU00190

Phenotypes of a mutant

essential PubMed

Database entries

• DBTBS entry: no entry

• SubtiList entry: [1]

Categories containing this gene/protein

DNA replication, essential genes

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: DnaX-DnaB PubMed, part of the replisome: PolC-HolA-HolB-DnaX-DnaN-DnaG-DnaC-DnaI-DnaD-SsbA-DnaE-PriA-DnaB PubMed

• Localization: Nucleoid (Mid-cell) PubMed nucleoid region (mid-cell spot) PubMed

Database entries

• Structure:

• UniProt: P09122

• KEGG entry: [2]

• E.C. number: 2.7.7.7

Expression and regulation

• Operon:

• Sigma factor:

• Regulation:

• Regulatory mechanism:

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Glenn M Sanders, H Garry Dallmann, Charles S McHenry
Reconstitution of the B. subtilis replisome with 13 proteins including two distinct replicases.
Mol Cell: 2010, 37(2);273-81
[PubMed:20122408] [WorldCat.org] [DOI] (I p)

Kiran Chintakayala, Cristina Machón, Anna Haroniti, Marilyn A Larson, Steven H Hinrichs, Mark A Griep, Panos Soultanas
Allosteric regulation of the primase (DnaG) activity by the clamp-loader (tau) in vitro.
Mol Microbiol: 2009, 72(2);537-49
[PubMed:19415803] [WorldCat.org] [DOI] (I p)

Jean-Christophe Meile, Ling Juan Wu, S Dusko Ehrlich, Jeff Errington, Philippe Noirot
Systematic localisation of proteins fused to the green fluorescent protein in Bacillus subtilis: identification of new proteins at the DNA replication factory.
Proteomics: 2006, 6(7);2135-46
[PubMed:16479537] [WorldCat.org] [DOI] (P p)

Anna Haroniti, Christopher Anderson, Zara Doddridge, Laurence Gardiner, Clive J Roberts, Stephanie Allen, Panos Soultanas
The clamp-loader-helicase interaction in Bacillus. Atomic force microscopy reveals the structural organisation of the DnaB-tau complex in Bacillus.
J Mol Biol: 2004, 336(2);381-93
[PubMed:14757052] [WorldCat.org] [DOI] (P p)

A Haroniti, R Till, M C M Smith, P Soultanas
Clamp-loader-helicase interaction in Bacillus. Leucine 381 is critical for pentamerization and helicase binding of the Bacillus tau protein.
Biochemistry: 2003, 42(37);10955-64
[PubMed:12974630] [WorldCat.org] [DOI] (P p)

María I Martínez-Jiménez, Pablo Mesa, Juan C Alonso
Bacillus subtilis tau subunit of DNA polymerase III interacts with bacteriophage SPP1 replicative DNA helicase G40P.
Nucleic Acids Res: 2002, 30(23);5056-64
[PubMed:12466528] [WorldCat.org] [DOI] (I p)

J C Struck, J C Alonso, H Y Toschka, V A Erdmann
The Bacillus subtilis small cytoplasmic RNA gene and 'dnaX' map near the chromosomal replication origin.
Mol Gen Genet: 1990, 222(2-3);470-2
[PubMed:1703271] [WorldCat.org] [DOI] (P p)