SsbA

• Description: single-strand DNA-binding protein, part of the replisome
  
  

Gene name	ssbA
Synonyms	ssb
Essential	yes PubMed
Product	single-strand DNA-binding protein
Function	DNA replication, recombination, repair
MW, pI	18 kDa, 4.822
Gene length, protein length	516 bp, 172 aa
Immediate neighbours	rpsR, rpsF
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: BSU40900

Phenotypes of a mutant

essential PubMed

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:

• Protein family:

• Paralogous protein(s): SsbB

Extended information on the protein

• Kinetic information:

• Domains:

• Modification: phosphorylated on Tyr-82 by PtkA, dephosphorylated by PtpZ PubMed

• Cofactor(s):

• Effectors of protein activity: Phosphorylation of Ssb increases binding to single-stranded DNA in vitro almost 200-fold PubMed

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

• Localization: Nucleoid (Mid-cell) PubMed

Database entries

• Structure:

• UniProt: P37455

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon:

• Sigma factor:

• Regulation:
  • RelA dependent downregulation (Class I) during stringent response PubMed

• 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)

Dawit Kidane, Begoña Carrasco, Candela Manfredi, Katharina Rothmaier, Silvia Ayora, Serkalem Tadesse, Juan C Alonso, Peter L Graumann
Evidence for different pathways during horizontal gene transfer in competent Bacillus subtilis cells.
PLoS Genet: 2009, 5(9);e1000630
[PubMed:19730681] [WorldCat.org] [DOI] (I p)

François Lecointe, Céline Sérèna, Marion Velten, Audrey Costes, Stephen McGovern, Jean-Christophe Meile, Jeffrey Errington, S Dusko Ehrlich, Philippe Noirot, Patrice Polard
Anticipating chromosomal replication fork arrest: SSB targets repair DNA helicases to active forks.
EMBO J: 2007, 26(19);4239-51
[PubMed:17853894] [WorldCat.org] [DOI] (P p)

Ivan Mijakovic, Dina Petranovic, Boris Macek, Tina Cepo, Matthias Mann, Julian Davies, Peter R Jensen, Dusica Vujaklija
Bacterial single-stranded DNA-binding proteins are phosphorylated on tyrosine.
Nucleic Acids Res: 2006, 34(5);1588-96
[PubMed:16549871] [WorldCat.org] [DOI] (I e)

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)