SinI

• Description: antagonist of SinR, drives SlrR from the SlrR(LOW) to the SlrR(HIGH) state
  
  

Gene name	sinI
Synonyms
Essential	no
Product	antagonist of SinR
Function	control of biofilm formation
Gene expression levels in SubtiExpress: sinI
Interactions involving this protein in SubtInteract: SinI
Regulation of this protein in SubtiPathways: Biofilm
MW, pI	6 kDa, 6.333
Gene length, protein length	171 bp, 57 aa
Immediate neighbours	yqhG, sinR
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

transcription factors and their control, transition state regulators, biofilm formation

This gene is a member of the following regulons

AbrB regulon, ScoC regulon, Spo0A regulon

The gene

Basic information

• Locus tag: BSU24600

Phenotypes of a mutant

• altered cell death pattern in colonies PubMed

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:

• Protein family:

• Paralogous protein(s): SlrA

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:
  • SinR-SinI PubMed, K(D) 1.8 nM PubMed

• Localization:

Database entries

• Structure: 1B0N (complex SinR-SinI) PubMed

• UniProt: P23308

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon: sinI-sinR PubMed

• Expression browser: sinI PubMed

• Sigma factor: SigA PubMed

• Regulation:
  • activated under conditions that trigger sporulation by (Spo0A) interaction PubMed,PubMed
  • repressed during exponential growth (ScoC) PubMed
  • repressed during logrithmic growth (AbrB) PubMed
  • repressed during vegetative growth (SinR) PubMed

• Regulatory mechanism:
  • Spo0A: transcription activation, in a portion of cells PubMed
  • ScoC: transcription repression PubMed
  • AbrB: transcription repression PubMed
  • SinR: transcription repression PubMed

• Additional information:
  • the mRNA is substantially stabilized upon depletion of RNase Y PubMed

Biological materials

• Mutant:
  • GP959 (spc), available in Stülke lab
  • DS91 (spc) NCIB3610 derivate, available in Stülke lab
  • 1S98 ( sinI::kan), PubMed, available at BGSC

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system: B. pertussis adenylate cyclase-based bacterial two hybrid system (BACTH), available in Stülke lab

• FLAG-tag construct (C-term): GP935 (kan), available in Stülke lab

• Antibody:

References

Reviews

Patrick Piggot
Epigenetic switching: bacteria hedge bets about staying or moving.
Curr Biol: 2010, 20(11);R480-2
[PubMed:20541494] [WorldCat.org] [DOI] (I p)

Original publications

Additonal publications: PubMed

Lehnik-Habrink M, Schaffer M, Mäder U, Diethmaier C, Herzberg C, Stülke J  
RNA processing in Bacillus subtilis: identification of targets of the essential RNase Y. 
Mol Microbiol. 2011 81(6): 1459-1473. 
PubMed:21815947

Yunrong Chai, Roberto Kolter, Richard Losick
Reversal of an epigenetic switch governing cell chaining in Bacillus subtilis by protein instability.
Mol Microbiol: 2010, 78(1);218-29
[PubMed:20923420] [WorldCat.org] [DOI] (I p)

Yunrong Chai, Frances Chu, Roberto Kolter, Richard Losick
Bistability and biofilm formation in Bacillus subtilis.
Mol Microbiol: 2008, 67(2);254-63
[PubMed:18047568] [WorldCat.org] [DOI] (P p)

Daniel B Kearns, Frances Chu, Steven S Branda, Roberto Kolter, Richard Losick
A master regulator for biofilm formation by Bacillus subtilis.
Mol Microbiol: 2005, 55(3);739-49
[PubMed:15661000] [WorldCat.org] [DOI] (P p)

Alejandro Sánchez, Jorge Olmos
Bacillus subtilis transcriptional regulators interaction.
Biotechnol Lett: 2004, 26(5);403-7
[PubMed:15104138] [WorldCat.org] [DOI] (P p)

Sasha H Shafikhani, Ines Mandic-Mulec, Mark A Strauch, Issar Smith, Terrance Leighton
Postexponential regulation of sin operon expression in Bacillus subtilis.
J Bacteriol: 2002, 184(2);564-71
[PubMed:11751836] [WorldCat.org] [DOI] (P p)

D J Scott, S Leejeerajumnean, J A Brannigan, R J Lewis, A J Wilkinson, J G Hoggett
Quaternary re-arrangement analysed by spectral enhancement: the interaction of a sporulation repressor with its antagonist.
J Mol Biol: 1999, 293(5);997-1004
[PubMed:10547280] [WorldCat.org] [DOI] (P p)

R J Lewis, J A Brannigan, W A Offen, I Smith, A J Wilkinson
An evolutionary link between sporulation and prophage induction in the structure of a repressor:anti-repressor complex.
J Mol Biol: 1998, 283(5);907-12
[PubMed:9799632] [WorldCat.org] [DOI] (P p)

M A Strauch
In vitro binding affinity of the Bacillus subtilis AbrB protein to six different DNA target regions.
J Bacteriol: 1995, 177(15);4532-6
[PubMed:7635837] [WorldCat.org] [DOI] (P p)

U Bai, I Mandic-Mulec, I Smith
SinI modulates the activity of SinR, a developmental switch protein of Bacillus subtilis, by protein-protein interaction.
Genes Dev: 1993, 7(1);139-48
[PubMed:8422983] [WorldCat.org] [DOI] (P p)

P T Kallio, J E Fagelson, J A Hoch, M A Strauch
The transition state regulator Hpr of Bacillus subtilis is a DNA-binding protein.
J Biol Chem: 1991, 266(20);13411-7
[PubMed:1906467] [WorldCat.org] (P p)

N K Gaur, K Cabane, I Smith
Structure and expression of the Bacillus subtilis sin operon.
J Bacteriol: 1988, 170(3);1046-53
[PubMed:3125149] [WorldCat.org] [DOI] (P p)