DnaG

• Description: DNA primase, part of the replisome
  
  

Gene name	dnaG
Synonyms	dnaE
Essential	yes PubMed
Product	DNA primase
Function	DNA replication
Gene expression levels in SubtiExpress: dnaG
Interactions involving this protein in SubtInteract: DnaG
MW, pI	68 kDa, 6.706
Gene length, protein length	1809 bp, 603 aa
Immediate neighbours	sigA, antE
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

This gene is a member of the following regulons

SigH regulon, Spo0A regulon

The gene

Basic information

• Locus tag: BSU25210

Phenotypes of a mutant

essential PubMed

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:
  • required for bacteriophage SPP1 replication PubMed

• Protein family: DNA primase family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:
  • the enzymatic activity is inhibited by (p)ppGpp during the ´stringent response´ PubMed
  • DnaG primase activity is stimulates by DnaC PubMed

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

• Localization: Cytoplasm (Homogeneous) PubMed

Database entries

• Structure: 1D0Q (zinc binding domain, Geobacillus stearothermophilus), 1Z8S (DnaB binding domain, AA 452-597, Geobacillus stearothermophilus)

• UniProt: P05096

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon: yqxD-dnaG-sigA PubMed

• Expression browser: dnaG PubMed

• Sigma factor: SigA PubMed, SigH PubMed

• Regulation:
  • repressed under conditions that trigger sporulation (Spo0A) PubMed
  • enzymatic activity is inhibited by (p)ppGpp during the ´stringent response´

• Regulatory mechanism:
  • Spo0A: transcription repression PubMed

• Additional information:
  • enzymatic activity is inhibited by (p)ppGpp during the ´stringent response´ PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Reviews

Geoffrey S Briggs, Wiep Klaas Smits, Panos Soultanas
Chromosomal replication initiation machinery of low-G+C-content Firmicutes.
J Bacteriol: 2012, 194(19);5162-70
[PubMed:22797751] [WorldCat.org] [DOI] (I p)

Richard L Gourse, James L Keck
Magic spots cast a spell on DNA primase.
Cell: 2007, 128(5);823-4
[PubMed:17350566] [WorldCat.org] [DOI] (P p)