SirA

• Description: sporulation protein, inhibits DNA replication
  
  

Gene name	sirA
Synonyms	yneE, yoxF
Essential	no
Product	inhibitor of DNA replication
Function	control of chromosome copy number
Gene expression levels in SubtiExpress: sirA
Interactions involving this protein in SubtInteract: SirA
MW, pI	17 kDa, 7.353
Gene length, protein length	444 bp, 148 aa
Immediate neighbours	tkt, yneF
Sequences	Protein DNA DNA_with_flanks
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

Categories containing this gene/protein

DNA replication

This gene is a member of the following regulons

Spo0A regulon

The gene

yneE was renamed to sirA.

Basic information

• Locus tag: BSU17900

Phenotypes of a mutant

"over-replication" during sporulation PubMed

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: interacts with DnaA and displaces it from the replication origin, resulting in inhibition of replication PubMed

• Protein family:

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:
  • SirA-DnaA PubMed

• Localization:

Database entries

• Structure:

• UniProt: P45707

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon: sirA-yneF PubMed

• Expression browser: sirA PubMed

• Sigma factor:

• Regulation:
  • expressed under conditions that trigger sporulation (Spo0A) PubMed

• Regulatory mechanism:
  • Spo0A: transcription activation PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

Your additional remarks

sirA (sporulation inhibitor of replication) is activated by Spo0A~P and inhibits DNA replication during sporulation.

References

Reviews

Tsutomu Katayama, Shogo Ozaki, Kenji Keyamura, Kazuyuki Fujimitsu
Regulation of the replication cycle: conserved and diverse regulatory systems for DnaA and oriC.
Nat Rev Microbiol: 2010, 8(3);163-70
[PubMed:20157337] [WorldCat.org] [DOI] (I p)

Original publications

Lilah Rahn-Lee, Houra Merrikh, Alan D Grossman, Richard Losick
The sporulation protein SirA inhibits the binding of DnaA to the origin of replication by contacting a patch of clustered amino acids.
J Bacteriol: 2011, 193(6);1302-7
[PubMed:21239581] [WorldCat.org] [DOI] (I p)

Jennifer K Wagner, Kathleen A Marquis, David Z Rudner
SirA enforces diploidy by inhibiting the replication initiator DnaA during spore formation in Bacillus subtilis.
Mol Microbiol: 2009, 73(5);963-74
[PubMed:19682252] [WorldCat.org] [DOI] (I p)

Lilah Rahn-Lee, Boris Gorbatyuk, Ole Skovgaard, Richard Losick
The conserved sporulation protein YneE inhibits DNA replication in Bacillus subtilis.
J Bacteriol: 2009, 191(11);3736-9
[PubMed:19329632] [WorldCat.org] [DOI] (I p)

Virginie Molle, Masaya Fujita, Shane T Jensen, Patrick Eichenberger, José E González-Pastor, Jun S Liu, Richard Losick
The Spo0A regulon of Bacillus subtilis.
Mol Microbiol: 2003, 50(5);1683-701
[PubMed:14651647] [WorldCat.org] [DOI] (P p)

T Schiött, C von Wachenfeldt, L Hederstedt
Identification and characterization of the ccdA gene, required for cytochrome c synthesis in Bacillus subtilis.
J Bacteriol: 1997, 179(6);1962-73
[PubMed:9068642] [WorldCat.org] [DOI] (P p)