SacB

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  • Description: levansucrase

Gene name sacB
Synonyms
Essential no
Product levansucrase
Function utilization of sucrose, production of levan
Metabolic function and regulation of this protein in SubtiPathways:
Sugar catabolism, Stress
MW, pI 52 kDa, 6.175
Gene length, protein length 1419 bp, 473 aa
Immediate neighbours pbpE, levB
Get the DNA and protein sequences
(Barbe et al., 2009)
Genetic context
SacB context.gif
This image was kindly provided by SubtiList







Categories containing this gene/protein

utilization of specific carbon sources

This gene is a member of the following regulons

DegU regulon, SacY regulon

The gene

Basic information

  • Locus tag: BSU34450

Phenotypes of a mutant

Database entries

  • DBTBS entry: [1]
  • SubtiList entry: [2]

Additional information

The protein

Basic information/ Evolution

  • Catalyzed reaction/ biological activity: Sucrose + (6)-beta-D-fructofuranosyl-(2->)(n) alpha-D-glucopyranoside = glucose + (6)-beta-D-fructofuranosyl-(2->)(n+1) alpha-D-glucopyranoside (according to Swiss-Prot)
  • Protein family: glycosyl hydrolase 68 family (according to Swiss-Prot)
  • Paralogous protein(s):

Extended information on the protein

  • Kinetic information:
  • Domains:
  • Modification:
  • Cofactor(s):
  • Effectors of protein activity:
  • Interactions:
  • Localization: secreted (according to Swiss-Prot), extracellular (signal peptide) PubMed

Database entries

  • Structure: 1PT2 (complex with sucrose), 1OYG
  • KEGG entry: [3]

Additional information

Expression and regulation

  • Regulation:
    • induction by sucrose (at high concentration) (SacY) PubMed
  • Additional information:

Biological materials

  • Mutant:
  • Expression vector:
  • lacZ fusion: pGP564 (in pAC7), a series of RAT mutations in pAC7, all available in Stülke lab
  • GFP fusion:
  • two-hybrid system:
  • Antibody:

Labs working on this gene/protein

Your additional remarks

References

Reviews

Massimiliano Marvasi, Pieter T Visscher, Lilliam Casillas Martinez
Exopolymeric substances (EPS) from Bacillus subtilis: polymers and genes encoding their synthesis.
FEMS Microbiol Lett: 2010, 313(1);1-9
[PubMed:20735481] [WorldCat.org] [DOI] (I p)

Original publications

Birgit Voigt, Haike Antelmann, Dirk Albrecht, Armin Ehrenreich, Karl-Heinz Maurer, Stefan Evers, Gerhard Gottschalk, Jan Maarten van Dijl, Thomas Schweder, Michael Hecker
Cell physiology and protein secretion of Bacillus licheniformis compared to Bacillus subtilis.
J Mol Microbiol Biotechnol: 2009, 16(1-2);53-68
[PubMed:18957862] [WorldCat.org] [DOI] (I p)

Kensuke Tsukahara, Mitsuo Ogura
Promoter selectivity of the Bacillus subtilis response regulator DegU, a positive regulator of the fla/che operon and sacB.
BMC Microbiol: 2008, 8;8
[PubMed:18197985] [WorldCat.org] [DOI] (I e)

Y Pereira, M F Petit-Glatron, R Chambert
yveB, Encoding endolevanase LevB, is part of the sacB-yveB-yveA levansucrase tricistronic operon in Bacillus subtilis.
Microbiology (Reading): 2001, 147(Pt 12);3413-9
[PubMed:11739774] [WorldCat.org] [DOI] (P p)

A M Crutz, M Steinmetz, S Aymerich, R Richter, D Le Coq
Induction of levansucrase in Bacillus subtilis: an antitermination mechanism negatively controlled by the phosphotransferase system.
J Bacteriol: 1990, 172(2);1043-50
[PubMed:2105292] [WorldCat.org] [DOI] (P p)

S Aymerich, M Steinmetz
Cloning and preliminary characterization of the sacS locus from Bacillus subtilis which controls the regulation of the exoenzyme levansucrase.
Mol Gen Genet: 1987, 208(1-2);114-20
[PubMed:3039303] [WorldCat.org] [DOI] (P p)

H Shimotsu, D J Henner
Modulation of Bacillus subtilis levansucrase gene expression by sucrose and regulation of the steady-state mRNA level by sacU and sacQ genes.
J Bacteriol: 1986, 168(1);380-8
[PubMed:2428811] [WorldCat.org] [DOI] (P p)

P Gay, D Le Coq, M Steinmetz, E Ferrari, J A Hoch
Cloning structural gene sacB, which codes for exoenzyme levansucrase of Bacillus subtilis: expression of the gene in Escherichia coli.
J Bacteriol: 1983, 153(3);1424-31
[PubMed:6402497] [WorldCat.org] [DOI] (P p)