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  • Description:
    • suppressor of recU mutations, participates in the stabilization and or processing of holliday junction intermediates PubMed
    • alternative description: antagonist to SigF, required for the switch from SigF- to SigG-dependent gene expression in the forespore PubMed

Gene name subA
Synonyms yabK
Essential no
Product unknown
Function homologous recombination
Gene expression levels in SubtiExpress: fin
MW, pI 8 kDa, 5.192
Gene length, protein length 228 bp, 76 aa
Immediate neighbours spoVC, mfd
Sequences Protein DNA DNA_with_flanks
Genetic context
YabK context.gif
This image was kindly provided by SubtiList
Expression at a glance   PubMed
Fin expression.png

Categories containing this gene/protein

DNA repair/ recombination, sigma factors and their control, sporulation proteins

This gene is a member of the following regulons

The gene

Basic information

  • Locus tag: BSU00540

Phenotypes of a mutant

sporulation defect (50-fold reduction of viable spore count) and arrest after engulfment PubMed

Database entries

  • DBTBS entry: no entry
  • SubtiList entry: [1]

Additional information

The protein

Basic information/ Evolution

  • Catalyzed reaction/ biological activity:
  • Protein family:
  • Paralogous protein(s):

Extended information on the protein

  • Kinetic information:
  • Domains:
  • Modification:
  • Cofactor(s):
  • Effectors of protein activity:
  • Localization: localizes diffusely within the forespore compartment of sporangia at both early and late stages of sporulation, cytosolic protein PubMed

Database entries

  • Structure:
  • KEGG entry: [2]
  • E.C. number:

Additional information

Expression and regulation

  • Operon:
  • Regulation: expressed in two waves in the forespore (after two hours (SigF) and three hours (SigG) after the onset of sporulation) PubMed
  • Regulatory mechanism:
  • Additional information:

Biological materials

  • Mutant:
  • Expression vector:
  • lacZ fusion:
  • GFP fusion:
  • two-hybrid system:
  • Antibody:

Labs working on this gene/protein

Your additional remarks


Begoña Carrasco, M Castillo Cozar, Rudi Lurz, Juan C Alonso, Silvia Ayora
Genetic recombination in Bacillus subtilis 168: contribution of Holliday junction processing functions in chromosome segregation.
J Bacteriol: 2004, 186(17);5557-66
[PubMed:15317759] [] [DOI] (P p)

B Carrasco, S Fernández, K Asai, N Ogasawara, J C Alonso
Effect of the recU suppressors sms and subA on DNA repair and homologous recombination in Bacillus subtilis.
Mol Genet Genomics: 2002, 266(5);899-906
[PubMed:11810266] [] [DOI] (P p)

Additional publications: PubMed