Crystal Structure of Phosphofructokinase apoenzyme from Trypanosoma brucei.

Experimental Data Snapshot

  • Resolution: 2.40 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.201 

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The First Crystal Structure of Phosphofructokinase from a Eukaryote: Trypanosoma brucei.

Martinez-Oyanedel, J.McNae, I.W.Nowicki, M.W.Keillor, J.W.Michels, P.A.Fothergill-Gilmore, L.A.Walkinshaw, M.D.

(2007) J Mol Biol 366: 1185-1198

  • DOI: https://doi.org/10.1016/j.jmb.2006.10.019
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The crystal structure of the ATP-dependent phosphofructokinase (PFK) from Trypanosoma brucei provides the first detailed description of a eukaryotic PFK, and enables comparisons to be made with the crystal structures of bacterial ATP-dependent and PPi-dependent PFKs. The structure reveals that two insertions (the 17-20 and 329-348 loops) that are characteristic of trypanosomatid PFKs, but absent from bacterial and mammalian ATP-dependent PFKs, are located within and adjacent to the active site, and are in positions to play important roles in the enzyme's mechanism. The 90 residue N-terminal extension forms a novel domain that includes an "embracing arm" across the subunit boundary to the symmetry-related subunit in the tetrameric enzyme. Comparisons with the PPi-dependent PFK from Borrelia burgdorferi show that several features thought to be characteristic of PPi-dependent PFKs are present in the trypanosome ATP-dependent PFK. These two enzymes are generally more similar to each other than to the bacterial or mammalian ATP-dependent PFKs. However, there are critical differences at the active site of PPi-dependent PFKs that are sufficient to prevent the binding of ATP. This crystal structure of a eukaryotic PFK has enabled us to propose a detailed model of human muscle PFK that shows active site and other differences that offer opportunities for structure-based drug discovery for the treatment of sleeping sickness and other diseases caused by the trypanosomatid family of protozoan parasites.

  • Organizational Affiliation

    Structural Biochemistry Group, Institute of Structural and Molecular Biology, University of Edinburgh, King's Buildings, Edinburgh EH9 3JR, Scotland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
487Trypanosoma bruceiMutation(s): 0 
Gene Names: pfk
Find proteins for O15648 (Trypanosoma brucei brucei)
Explore O15648 
Go to UniProtKB:  O15648
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO15648
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.40 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.201 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 118.765α = 90
b = 92.497β = 90
c = 79.534γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-02-13
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations