SkfB

• Description: synthesis of spore killing factor
  
  

Gene name	skfB
Synonyms	ybcP, ybcQ
Essential	no
Product	unknown
Function	synthesis of spore killing factor
MW, pI	45 kDa, 4.934
Gene length, protein length	1230 bp, 410 aa
Immediate neighbours	skfA, skfC
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: BSU01920

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

Categories containing this gene/protein

toxins, antitoxins and immunity against toxins

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:

• Protein family: moaA/nifB/pqqE family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s): contains an iron-sulfur cluster

• Effectors of protein activity:

• Interactions:

• Localization:

Database entries

• Structure:

• UniProt: O31423

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon: skfA-skfB-skfC-skfD-skfE-skfF-skfG-skfH PubMed

• Sigma factor: SigA PubMed

• Regulation:
  • expressed under conditions that trigger sporulation (Spo0A) PubMed
  • repressed during logrithmic growth (AbrB) PubMed

• Regulatory mechanism:
  • Spo0A: transcription activation PubMed
  • AbrB: transcription repression PubMed

• Additional information: Northern blotting during during phosphate limitation showed an intense 0.25 kb skfA-specific transcript, and a weaker 6.5 kb skfA-skfB-skfC-skfD-skfE-skfF-skfG-skfH transcript. The skfA transcript is stabilized by a stem-loop structure in the skfA-skfB intergenic region. PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Reviews

José Eduardo González-Pastor
Cannibalism: a social behavior in sporulating Bacillus subtilis.
FEMS Microbiol Rev: 2011, 35(3);415-24
[PubMed:20955377] [WorldCat.org] [DOI] (I p)