LevE

• Description: trigger enzyme: fructose-specific phosphotransferase system, EIIB component
  
  

Gene name	levE
Synonyms	sacL
Essential	no
Product	trigger enzyme: fructose-specific phosphotransferase system, EIIB component fructose-specific enzyme IIB (EC 2.7.1.69)
Function	fructose uptake and phosphorylation, control of LevR activity
Metabolic function and regulation of this protein in SubtiPathways: Sugar catabolism
MW, pI	17 kDa, 9.444
Gene length, protein length	486 bp, 162 aa
Immediate neighbours	levF, levD
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: BSU27060

Database entries

• DBTBS entry: no entry

• SubtiList entry: [1]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: Protein EIIB N(pi)-phospho-L-histidine/cysteine + sugar = protein EIIB + sugar phosphate (according to Swiss-Prot)

• Protein family: PTS permease, mannose permease (Man) family PubMed

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions: LevE-LevR

• Localization: cell membrane (according to Swiss-Prot)

Database entries

• Structure: 1BLE

• Swiss prot entry: P26380

• KEGG entry: [2]

• E.C. number: 2.7.1.69

Expression and regulation

• Operon: levD-levE-levF-levG-sacC

• Sigma factor: SigL

• Regulation: repressed by glucose (CcpA) , carbon catabolite repression, induction by fructose

• Regulatory mechanism: CcpA: transcription repression, catabolite repression: transcription repression by CcpA, transcription activator LevR is less active in the presence of glucose; induction: transcription activation by LevR

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

1. Reizer et al. (1999) Novel phosphotransferase system genes revealed by genome analysis - the complete complement of PTS proteins encoded within the genome of Bacillus subtilis. Microbiology 145: 3419-3429 PubMed

1. Martin-Verstraete, I., Débarbouillé, M., Klier, A., and Rapoport, G. (1990) Levanase operon of Bacillus subtilis includes a fructose-specific phosphotransferase system regulating the expression of the operon. J Mol Biol 214: 657-671. PubMed
2. Martin-Verstraete, I., Charrier, V., Stülke, J., Galinier, A., Erni, B., Rapoport, G., & Deutscher, J. (1998) Antagonistic effects of dual PTS catalyzed phosphorylation on the Bacillus subtilis transcriptional activator LevR. Mol. Microbiol. 28: 293-303. PubMed
3. Schauder S, Nunn RS, Lanz R, Erni B, Schirmer T. 1998. Crystal structure of the IIB subunit of a fructose permease (IIBLev) from Bacillus subtilis. J. Mol. Biol. 276:591-602. PubMed
4. Seip, S., R. Lanz, R. Gutknecht, K. Flükiger, and B. Erni. 1997. The fructose transporter of Bacillus subtilis encoded by the lev operon. Backbone assignment and secondary structure of the IIBLev subunit. Eur. J. Biochem. 243: 306-314. PubMed
5. Charrier V, Deutscher J, Martin-Verstraete I (1997b) Protein phosphorylation chain of a Bacillus subtilis fructose-specific phosphotransferase system and its participation in regulation of the expression of the lev operon. Biochemistry 36:1163-1172. PubMed
6. Author1, Author2 & Author3 (year) Title Journal volume: page-page. PubMed