Tpi

• Description: triose phosphate isomerase, glycolytic/ gluconeogenic enzyme
  
  

Gene name	tpi
Synonyms	tpiA
Essential	yes
Product	triosephosphate isomerase
Function	enzyme in glycolysis/ gluconeogenesis
MW, pI	26,9 kDa, 4.79
Gene length, protein length	759 bp, 253 amino acids
Immediate neighbours	pgk, pgm
Gene sequence (+200bp)	Protein sequence
Genetic context

The gene

Basic information

• Coordinates: 3478439 - 3479197

Phenotypes of a mutant

essential PubMed

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: D-glyceraldehyde 3-phosphate = dihydroxyacetone phosphate

• Protein family: triosephosphate isomerase family

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification: phosphorylation (STY) PubMed

• Cofactor(s):

• Effectors of protein activity: inhibited by 2-phosphoglycolate (in B. stearothermophilus) PubMed

• Interactions: Pgm-TpiA

• Localization: cytoplasm PubMed

Database entries

• Structure: complex with 2-phosphpoglycolic acid, Geobacillus stearothermophilus NCBI

• Swiss prot entry: [3]

• KEGG entry: [4]

• E.C. number: [5]

Expression and regulation

• Operon:
  • cggR-gapA-pgk-tpiA-pgm-eno
  • pgk-tpiA-pgm-eno

• Sigma factor: SigA

• Regulation:

cggR: neg. regulated by CggR PubMed, induced by sugar

pgk: constitutive PubMed

• Regulatory mechanism: transcription repression by CggR PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector: pGP394 (N-terminal His-tag, in pWH844), pGP89 (N-terminal Strep-tag, for SPINE, expression in B. subtilis), available in Stülke lab

• lacZ fusion:

• GFP fusion:

• two-hybrid system: B. pertussis adenylate cyclase-based bacterial two hybrid system (BACTH), available in Stülke lab

• Antibody:

References

1. Ludwig, H., Homuth, G., Schmalisch, M., Dyka, F. M., Hecker, M., and Stülke, J. (2001) Transcription of glycolytic genes and operons in Bacillus subtilis: evidence for the presence of multiple levels of control of the gapA operon. Mol Microbiol 41, 409-422.PubMed
2. Jannière, L., Canceill, D., Suski, C., Kanga, S., Dalmais, B., Lestini, R., Monnier, A. F., Chapuis, J., Bolotin, A., Titok, M., Le Chatelier, E., and Ehrlich, S. D. (2007) Genetic evidence for a link between glycolysis and DNA replication. PLoS ONE 2, e447. PubMed
3. Leyva-Vazquez, M. A., and Setlow, P. (1994) Cloning and nucleotide sequences of the genes encoding triose phosphate isomerase, phosphoglycerate mutase, and enolase from Bacillus subtilis. J Bacteriol 176: 3903-3910. PubMed
4. Macek et al. (2007) The serine/ threonine/ tyrosine phosphoproteome of the model bacterium Bacillus subtilis. Mol. Cell. Proteomics 6: 697-707 PubMed