EpsB

• Description: extracellular polysaccharide synthesis, putative protein tyrosine kinase
  
  

Gene name	epsB
Synonyms	yveL
Essential	no
Product	unknown
Function	biofilm formation
Regulation of this protein in SubtiPathways: Biofilm
MW, pI	24 kDa, 9.918
Gene length, protein length	681 bp, 227 aa
Immediate neighbours	epsC, epsA
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: BSU34360

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

Categories containing this gene/protein

protein modification, biofilm formation

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: ATP + a [protein]-L-tyrosine = ADP + a [protein]-L-tyrosine phosphate (according to Swiss-Prot)

• Protein family: cpsD/capB family (according to Swiss-Prot)

• Paralogous protein(s): PtkA

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions: EpsA-EpsB (based on TkmA-PtkA interaction)

• Localization:

Database entries

• Structure: 2VED (CapB, the homolog in Staphylococcus aureus) PubMed

• UniProt: P71051

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon: epsA-epsB-epsC-epsD-epsE-epsF-epsG-epsH-epsI-epsJ-epsK-epsL-epsM-epsN-epsO PubMed

• Sigma factor: SigA PubMed

• Regulation:
  • repressed by SinR PubMed

• Regulatory mechanism:
  • SinR: transcription repression PubMed
  • AbrB: transcription repression PubMed

• Additional information:
  • induction by sequestration of SinR by SinI or SlrA PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

Labs working on this gene/protein

Richard Losick, Harvard Univ., Cambridge, USA homepage