CapB

• Description: capsular polyglutamate biosynthesis
  
  

Gene name	capB
Synonyms	ywsC, pgsB
Essential	no
Product	poly-gamma-glutamate synthetase
Function	capsule synthesis
MW, pI	43 kDa, 5.073
Gene length, protein length	1179 bp, 393 aa
Immediate neighbours	capC, rbsR
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:

Phenotypes of a mutant

no synthesis of the poly-gamma-glutamate capsule PubMed

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: synthesis of poly-gamma-glutamate from L-Glu PubMed

• Protein family:

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:

• Localization:

Database entries

• Structure:

• Swiss prot entry: P96736

• KEGG entry: BSU35900

• E.C. number:

Expression and regulation

• Operon: capB-capC-capA-ywtC PubMed

• Sigma factor: SigA PubMed

• Regulation:

• Regulatory mechanism: activated by DegU-P PubMed

• Additional information: The operon is not expressed in the lab strain 168 due to lack of expression of DegQ resulting in inactivity of DegS and DegU

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Keitarou Kimura, Lam-Son Phan Tran, Thi-Huyen Do, Yoshifumi Itoh
Expression of the pgsB encoding the poly-gamma-DL-glutamate synthetase of Bacillus subtilis (natto).
Biosci Biotechnol Biochem: 2009, 73(5);1149-55
[PubMed:19420703] [WorldCat.org] [DOI] (I p)

Cecilia Osera, Giuseppe Amati, Cinzia Calvio, Alessandro Galizzi
SwrAA activates poly-gamma-glutamate synthesis in addition to swarming in Bacillus subtilis.
Microbiology (Reading): 2009, 155(Pt 7);2282-2287
[PubMed:19389763] [WorldCat.org] [DOI] (P p)

Yuji Urushibata, Shinji Tokuyama, Yasutaka Tahara
Characterization of the Bacillus subtilis ywsC gene, involved in gamma-polyglutamic acid production.
J Bacteriol: 2002, 184(2);337-43
[PubMed:11751809] [WorldCat.org] [DOI] (P p)