1ZXX

The crystal structure of phosphofructokinase from Lactobacillus delbrueckii


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Kinetic and Structural Characterization of Phosphofructokinase from Lactobacillus bulgaricus.

Paricharttanakul, N.M.Ye, S.Menefee, A.L.Javid-Majd, F.Sacchettini, J.C.Reinhart, G.D.

(2005) Biochemistry 44: 15280-15286

  • DOI: 10.1021/bi051283g

  • PubMed Abstract: 
  • Phosphofructokinase from Lactobacillus delbrueckii subspecies bulgaricus (LbPFK) has been reported to be a nonallosteric analogue of phosphofructokinase from Escherichia coli at pH 8.2 [Le Bras et al. (1991) Eur. J. Biochem. 198, 683-687]. A reexamin ...

    Phosphofructokinase from Lactobacillus delbrueckii subspecies bulgaricus (LbPFK) has been reported to be a nonallosteric analogue of phosphofructokinase from Escherichia coli at pH 8.2 [Le Bras et al. (1991) Eur. J. Biochem. 198, 683-687]. A reexamination of the kinetics of this enzyme shows LbPFK to have limited binding affinity toward the allosteric ligands, MgADP and PEP, with dissociation constants of approximately 20 mM for both. Their allosteric effects are observed only at high concentrations of these ligands, with both exhibiting inhibitory effects on substrate binding. No pH dependence was observed for the binding and the influence of MgADP and PEP on the enzyme. To attempt to explain these results, the crystal structure of LbPFK was solved using molecular replacement to 1.86 A resolution. A comparative study of the LbPFK structure with that of phosphofructokinases from E. coli (EcPFK) and Bacillus stearothermophilus (BsPFK) reveals a structure with conserved fold and substrate binding site. The effector binding site, however, shows many differences that could explain the observed decreases in binding affinity for MgADP and PEP in LbPFK as compared to the other two enzymes.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, Texas A&M University, and the Texas Agricultural Experiment Station, College Station, Texas 77843-2128, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
6-phosphofructokinase
A
319Lactobacillus delbrueckii subsp. bulgaricusGene Names: pfkA
EC: 2.7.1.11
Find proteins for P80019 (Lactobacillus delbrueckii subsp. bulgaricus)
Go to UniProtKB:  P80019
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.222 
  • Space Group: P 62 2 2
Unit Cell:
Length (Å)Angle (°)
a = 135.014α = 90.00
b = 135.014β = 90.00
c = 77.660γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
AMoREphasing
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-11-08
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance