PfkA

• Description: phosphofructokinase, glycolytic enzyme
  
  

Gene name	pfkA
Synonyms	pfk
Essential	yes
Product	6-phosphofructokinase
Function	catabolic enzyme in glycolysis
MW, pI	34,1 kDa, 6.14
Gene length, protein length	957 bp, 319 amino acids
Immediate neighbours	accA, pyk
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

The gene

Basic information

• Coordinates: 2985630 - 2986586

Phenotypes of a mutant

essential PubMed

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: ATP + D-fructose 6-phosphate = ADP + D-fructose 1,6-bisphosphate

• Protein family: phosphofructokinase family

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:
  • 3 x nucleotide binding domain (ATP) (21–25), (154–158), (171–187)

• Modification:

• Cofactor(s): ATP

• Effectors of protein activity: inhibited by citrate, ATP, PEP, Ca2+, and others (in B. licheniformes) PubMed

• Interactions: PfkA-Pgm, PfkA-Eno, PfkA-Rny, PfkA-PnpA, PfkA-RnjA PubMed

• Localization: cytoplasm (according to Swiss-Prot), Cytoplasm (Homogeneous) PubMed

Database entries

• Structure: 1MTO (mutant, complex with fructose-6-phosphate, Geobacillus stearothermophilus), 4PFK (Geobacillus stearothermophilus), Geobacillus stearothermophilus NCBI, Mutant form, complex with fructose-6-phosphate Geobacillus stearothermophilus NCBI

• Swiss prot entry: O34529

• KEGG entry: [3]

• E.C. number: 2.7.1.11

Expression and regulation

• Operon: pfkA pyk PubMed

• Sigma factor:

• Regulation: twofold induced by glucose PubMed

• Regulatory mechanism:

• Additional information:

Biological materials

• Mutant:

• Expression vector: pGP393 (N-terminal His-tag, in pWH844), pGP87 (N-terminal Strep-tag, for SPINE, expression in B. subtilis, in pGP380), available in Stülke lab

• lacZ fusion: pGP511 (in pAC6), available in Stülke lab

• GFP fusion:

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

• Antibody:

Labs working on this gene/protein

Jörg Stülke, University of Göttingen, Germany Homepage

References

1. Meile et al. (2006) Systematic localisation of proteins fused to the green fluorescent protein in Bacillus subtilis: identification of new proteins at the DNA replication factory Proteomics 6: 2135-2146. PubMed
2. Commichau, F. M., Rothe, F. M., Herzberg, C., Wagner, E., Hellwig, D., Lehnik-Habrink, M., Hammer, E., Völker, U. & Stülke, J. (2009) Novel activities of glycolytic enzymes in Bacillus subtilis: Interactions with essential proteins involved in mRNA processing. Mol. Cell. Proteomics in press PubMed
3. 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