SacT

• Description: transcriptional antiterminator for the sacP-sacA operon
  
  

Gene name	sacT
Synonyms	ipa-47d
Essential	no
Product	transcriptional antiterminator
Function	regulation of sucrose utilization
Metabolic function and regulation of this protein in SubtiPathways: Sugar catabolism, Stress
MW, pI	31 kDa, 5.587
Gene length, protein length	828 bp, 276 aa
Immediate neighbours	ywcJ, ywcI
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: BSU38070

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: binding to the mRNA of the sacP-sacA operon, causes transcription antitermination (in presence of sucrose and absence of glucose)

• Protein family: transcriptional antiterminator bglG family (according to Swiss-Prot) BglG family of antiterminators

• Paralogous protein(s): LicT, SacY, GlcT

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions: PtsH-SacT

• Localization:

Database entries

• Structure:

• UniProt: P26212

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon: sacT PubMed

• Sigma factor:

• Regulation:
  • repressed by casamino acids PubMed

• Regulatory mechanism:

• Additional information:

Biological materials

• Mutant: GP429 (spc), available in Stülke lab

• Expression vector:
  • for expression, purification of both PRDs in E. coli with N-terminal His-tag, in pWH844: pGP166, available in Stülke lab
  • for expression, purification of PRD-1 in E. coli with N-terminal His-tag, in pWH844: pGP426, available in Stülke lab
  • for expression, purification of PRD-2 in E. coli with N-terminal His-tag, in pWH844: pGP427, available in Stülke lab
  • for expression, purification of PRD-1 in E. coli with N-terminal His-tag and thrombin cleavage site, in pGP570: pGP439, available in Stülke lab
  • for expression, purification of PRD-2 in E. coli with N-terminal His-tag and thrombin cleavage site, in pGP570: pGP440, available in Stülke lab
  • for expression, purification of the RNA-binding domain in E. coli with N-terminal His-tag and thrombin cleavage site, in pGP570: pGP571, available in Stülke lab
  • for expression of the RNA-binding domain in B. subtilis, in pBQ200: pGP446, available in Stülke lab

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

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)

M Arnaud, M Débarbouillé, G Rapoport, M H Saier, J Reizer
In vitro reconstitution of transcriptional antitermination by the SacT and SacY proteins of Bacillus subtilis.
J Biol Chem: 1996, 271(31);18966-72
[PubMed:8702561] [WorldCat.org] [DOI] (P p)

S Aymerich, M Steinmetz
Specificity determinants and structural features in the RNA target of the bacterial antiterminator proteins of the BglG/SacY family.
Proc Natl Acad Sci U S A: 1992, 89(21);10410-4
[PubMed:1279678] [WorldCat.org] [DOI] (P p)

M Arnaud, P Vary, M Zagorec, A Klier, M Debarbouille, P Postma, G Rapoport
Regulation of the sacPA operon of Bacillus subtilis: identification of phosphotransferase system components involved in SacT activity.
J Bacteriol: 1992, 174(10);3161-70
[PubMed:1577686] [WorldCat.org] [DOI] (P p)

M Debarbouille, M Arnaud, A Fouet, A Klier, G Rapoport
The sacT gene regulating the sacPA operon in Bacillus subtilis shares strong homology with transcriptional antiterminators.
J Bacteriol: 1990, 172(7);3966-73
[PubMed:2163394] [WorldCat.org] [DOI] (P p)