HolB

• Description: DNA polymerase III (delta' subunit), part of the clamp-loader complex and the replisome
  
  

Gene name	holB
Synonyms	yaaS
Essential	yes PubMed
Product	DNA polymerase III (delta' subunit)
Function	DNA replication
Gene expression levels in SubtiExpress: holB
Interactions involving this protein in SubtInteract: HolB
MW, pI	37 kDa, 6.334
Gene length, protein length	987 bp, 329 aa
Immediate neighbours	yaaR, yaaT
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

DNA replication, essential genes

The gene

Basic information

• Locus tag: BSU00310

Phenotypes of a mutant

essential PubMed

Database entries

• DBTBS entry: no entry

• SubtiList entry: [1]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:
  • Deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1) (according to Swiss-Prot)
  • required for bacteriophage SPP1 replication PubMed

• Protein family:

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:
  • DnaX(3)-HolA-HolB, the clamp-loader complex PubMed
  • part of the replisome: PolC-HolA-HolB-DnaX-DnaN-DnaG-DnaC-DnaI-DnaD-SsbA-DnaE-PriA-DnaB PubMed

• Localization:
  • forms foci PubMed
  • cytoplasm (homogeneous) PubMed

Database entries

• Structure:

• UniProt: P37540

• KEGG entry: [2]

• E.C. number: 2.7.7.7

Expression and regulation

• Operon:

• Expression browser: holB PubMed

• Sigma factor:

• Regulation:

• Regulatory mechanism:

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

José P Afonso, Kiran Chintakayala, Chatrudee Suwannachart, Svetlana Sedelnikova, Kevin Giles, John B Hoyes, Panos Soultanas, John B Rafferty, Neil J Oldham
Insights into the structure and assembly of the Bacillus subtilis clamp-loader complex and its interaction with the replicative helicase.
Nucleic Acids Res: 2013, 41(9);5115-26
[PubMed:23525462] [WorldCat.org] [DOI] (I p)

Elena M Seco, John C Zinder, Carol M Manhart, Ambra Lo Piano, Charles S McHenry, Silvia Ayora
Bacteriophage SPP1 DNA replication strategies promote viral and disable host replication in vitro.
Nucleic Acids Res: 2013, 41(3);1711-21
[PubMed:23268446] [WorldCat.org] [DOI] (I p)

Andrew D Klocko, Jeremy W Schroeder, Brian W Walsh, Justin S Lenhart, Margery L Evans, Lyle A Simmons
Mismatch repair causes the dynamic release of an essential DNA polymerase from the replication fork.
Mol Microbiol: 2011, 82(3);648-63
[PubMed:21958350] [WorldCat.org] [DOI] (I p)

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)

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)