2WF9

Structure of Beta-Phosphoglucomutase inhibited with Glucose-6- phosphate, and Beryllium trifluoride, crystal form 2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.184 

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Literature

Near Attack Conformers Dominate Beta-Phosphoglucomutase Complexes Where Geometry and Charge Distribution Reflect Those of Substrate.

Griffin, J.L.Bowler, M.W.Baxter, N.J.Leigh, K.N.Dannatt, H.R.Hounslow, A.M.Blackburn, G.M.Webster, C.E.Cliff, M.J.Waltho, J.P.

(2012) Proc.Natl.Acad.Sci.USA 109: 6910

  • DOI: 10.1073/pnas.1116855109
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Experimental observations of fluoromagnesate and fluoroaluminate complexes of β-phosphoglucomutase (β-PGM) have demonstrated the importance of charge balance in transition-state stabilization for phosphoryl transfer enzymes. Here, direct observations ...

    Experimental observations of fluoromagnesate and fluoroaluminate complexes of β-phosphoglucomutase (β-PGM) have demonstrated the importance of charge balance in transition-state stabilization for phosphoryl transfer enzymes. Here, direct observations of ground-state analog complexes of β-PGM involving trifluoroberyllate establish that when the geometry and charge distribution closely match those of the substrate, the distribution of conformers in solution and in the crystal predominantly places the reacting centers in van der Waals proximity. Importantly, two variants are found, both of which satisfy the criteria for near attack conformers. In one variant, the aspartate general base for the reaction is remote from the nucleophile. The nucleophile remains protonated and forms a nonproductive hydrogen bond to the phosphate surrogate. In the other variant, the general base forms a hydrogen bond to the nucleophile that is now correctly orientated for the chemical transfer step. By contrast, in the absence of substrate, the solvent surrounding the phosphate surrogate is arranged to disfavor nucleophilic attack by water. Taken together, the trifluoroberyllate complexes of β-PGM provide a picture of how the enzyme is able to organize itself for the chemical step in catalysis through the population of intermediates that respond to increasing proximity of the nucleophile. These experimental observations show how the enzyme is capable of stabilizing the reaction pathway toward the transition state and also of minimizing unproductive catalysis of aspartyl phosphate hydrolysis.


    Organizational Affiliation

    Department of Molecular Biology and Biotechnology, Krebs Institute, University of Sheffield, Sheffield S10 2TN, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BETA-PHOSPHOGLUCOMUTASE
A
221Lactococcus lactis subsp. lactis (strain IL1403)Mutation(s): 0 
Gene Names: pgmB
EC: 5.4.2.6
Find proteins for P71447 (Lactococcus lactis subsp. lactis (strain IL1403))
Go to UniProtKB:  P71447
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

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Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
G6P
Query on G6P

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Download CCD File 
A
ALPHA-D-GLUCOSE-6-PHOSPHATE
C6 H13 O9 P
NBSCHQHZLSJFNQ-DVKNGEFBSA-N
 Ligand Interaction
BG6
Query on BG6

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Download CCD File 
A
BETA-D-GLUCOSE-6-PHOSPHATE
C6 H13 O9 P
NBSCHQHZLSJFNQ-VFUOTHLCSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
BEF
Query on BEF

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Download CCD File 
A
BERYLLIUM TRIFLUORIDE ION
Be F3
OGIAHMCCNXDTIE-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.184 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 32.100α = 90.00
b = 72.700β = 90.00
c = 85.200γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
SCALAdata scaling
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-05-26
    Type: Initial release
  • Version 1.1: 2012-05-16
    Type: Database references, Derived calculations, Non-polymer description, Version format compliance