Crystal structure of HGPRT-ase from Leishmania tarentolae in complex with GMP

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 

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Crystal structure of Leishmania tarentolae hypoxanthine-guanine phosphoribosyltransferase.

Monzani, P.S.Trapani, S.Thiemann, O.H.Oliva, G.

(2007) BMC Struct Biol 7: 59-59

  • DOI: https://doi.org/10.1186/1472-6807-7-59
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Hypoxanthine-guanine phosphoribosyltransferase (HGPRT) (EC is a central enzyme in the purine recycling pathway. Parasitic protozoa of the order Kinetoplastida cannot synthesize purines de novo and use the salvage pathway to synthesize purine bases, making this an attractive target for antiparasitic drug design. The glycosomal HGPRT from Leishmania tarentolae in a catalytically active form purified and co-crystallized with a guanosine monophosphate (GMP) in the active site. The dimeric structure of HGPRT has been solved by molecular replacement and refined against data extending to 2.1 A resolution. The structure reveals the contacts of the active site residues with GMP. Comparative analysis of the active sites of Leishmania and human HGPRT revealed subtle differences in the position of the ligand and its interaction with the active site residues, which could be responsible for the different reactivities of the enzymes to allopurinol reported in the literature. The solution and analysis of the structure of Leishmania HGPRT may contribute to further investigations leading to a full understanding of this important enzyme family in protozoan parasites.

  • Organizational Affiliation

    Departamento de Física e Informática, Grupo de Cristalografia de Proteínas e Biologia Estrutural, Instituto de Física de São Carlos, USP, Caixa Postal 369, 13560-590, São Carlos - SP, Brazil. monzani@if.sc.usp.br

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
hypoxanthine-guanine phosphoribosyltransferase
A, B
211Leishmania tarentolaeMutation(s): 0 
Gene Names: hgprt
Find proteins for Q9NJI5 (Leishmania tarentolae)
Explore Q9NJI5 
Go to UniProtKB:  Q9NJI5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9NJI5
Sequence Annotations
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.104α = 90
b = 85.443β = 90
c = 87.598γ = 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: 2004-07-27
    Type: Initial release
  • Version 1.1: 2007-11-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2023-08-16
    Changes: Data collection, Database references, Derived calculations, Refinement description