ComK

• Description: competence transcription factor (CTF)
  
  

Gene name	comK
Synonyms
Essential	no
Product	competence transcription factor (CTF)
Function	regulation of competence and DNA uptake
MW, pI	22 kDa, 7.669
Gene length, protein length	576 bp, 192 aa
Immediate neighbours	yhzC, yhxD
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: BSU10420

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

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:

• Interactions: MecA-ComK PubMed

• Localization:

Database entries

• Structure:

• Swiss prot entry: P40396

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon:

• Sigma factor:

• Regulation: repressed by casamino acids PubMed
  • repressed by Rok PubMed
  • repressed during growth in the presence of branched chain amino acids (CodY) PubMed
  • repressed during logrithmic growth (AbrB) PubMed

• Regulatory mechanism:
  • Rok: transcription repression PubMed
  • CodY: transcription repression PubMed
  • AbrB: transcription repression PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

Labs working on this gene/protein

Oscar Kuipers, University of Groningen, The Netherlands Homepage

References

Wiep Klaas Smits, Cristina Bongiorni, Jan-Willem Veening, Leendert W Hamoen, Oscar P Kuipers, Marta Perego
Temporal separation of distinct differentiation pathways by a dual specificity Rap-Phr system in Bacillus subtilis.
Mol Microbiol: 2007, 65(1);103-20
[PubMed:17581123] [WorldCat.org] [DOI] (P p)

Wiep Klaas Smits, Tran Thu Hoa, Leendert W Hamoen, Oscar P Kuipers, David Dubnau
Antirepression as a second mechanism of transcriptional activation by a minor groove binding protein.
Mol Microbiol: 2007, 64(2);368-81
[PubMed:17493123] [WorldCat.org] [DOI] (P p)

Kim A Susanna, Fabrizia Fusetti, Andy-Mark W H Thunnissen, Leendert W Hamoen, Oscar P Kuipers
Functional analysis of the competence transcription factor ComK of Bacillus subtilis by characterization of truncation variants.
Microbiology (Reading): 2006, 152(Pt 2);473-483
[PubMed:16436435] [WorldCat.org] [DOI] (P p)

Kim A Susanna, Chris D den Hengst, Leendert W Hamoen, Oscar P Kuipers
Expression of transcription activator ComK of Bacillus subtilis in the heterologous host Lactococcus lactis leads to a genome-wide repression pattern: a case study of horizontal gene transfer.
Appl Environ Microbiol: 2006, 72(1);404-11
[PubMed:16391071] [WorldCat.org] [DOI] (P p)

Leendert W Hamoen, Daisy Kausche, Mohamed A Marahiel, Douwe van Sinderen, Gerard Venema, Pascale Serror
The Bacillus subtilis transition state regulator AbrB binds to the -35 promoter region of comK.
FEMS Microbiol Lett: 2003, 218(2);299-304
[PubMed:12586407] [WorldCat.org] [DOI] (P p)

Ulrike Mäder, Georg Homuth, Christian Scharf, Knut Büttner, Rüdiger Bode, Michael Hecker
Transcriptome and proteome analysis of Bacillus subtilis gene expression modulated by amino acid availability.
J Bacteriol: 2002, 184(15);4288-95
[PubMed:12107147] [WorldCat.org] [DOI] (P p)

Michiko M Nakano, Shunji Nakano, Peter Zuber
Spx (YjbD), a negative effector of competence in Bacillus subtilis, enhances ClpC-MecA-ComK interaction.
Mol Microbiol: 2002, 44(5);1341-9
[PubMed:12028382] [WorldCat.org] [DOI] (P p)

Tran Thu Hoa, Pablo Tortosa, Mark Albano, David Dubnau
Rok (YkuW) regulates genetic competence in Bacillus subtilis by directly repressing comK.
Mol Microbiol: 2002, 43(1);15-26
[PubMed:11849533] [WorldCat.org] [DOI] (P p)

M M Nakano, F Hajarizadeh, Y Zhu, P Zuber
Loss-of-function mutations in yjbD result in ClpX- and ClpP-independent competence development of Bacillus subtilis.
Mol Microbiol: 2001, 42(2);383-94
[PubMed:11703662] [WorldCat.org] [DOI] (P p)

M Persuh, K Turgay, I Mandic-Mulec, D Dubnau
The N- and C-terminal domains of MecA recognize different partners in the competence molecular switch.
Mol Microbiol: 1999, 33(4);886-94
[PubMed:10447896] [WorldCat.org] [DOI] (P p)

M Ogura, L Liu, M Lacelle, M M Nakano, P Zuber
Mutational analysis of ComS: evidence for the interaction of ComS and MecA in the regulation of competence development in Bacillus subtilis.
Mol Microbiol: 1999, 32(4);799-812
[PubMed:10361283] [WorldCat.org] [DOI] (P p)

P Serror, A L Sonenshein
CodY is required for nutritional repression of Bacillus subtilis genetic competence.
J Bacteriol: 1996, 178(20);5910-5
[PubMed:8830686] [WorldCat.org] [DOI] (P p)

L Kong, D Dubnau
Regulation of competence-specific gene expression by Mec-mediated protein-protein interaction in Bacillus subtilis.
Proc Natl Acad Sci U S A: 1994, 91(13);5793-7
[PubMed:8016067] [WorldCat.org] [DOI] (P p)

1. Author1, Author2 & Author3 (year) Title Journal volume: page-page. PubMed