1FSG

TOXOPLASMA GONDII HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE COMPLEXED WITH 9-DEAZAGUANINE, ALPHA-D-5-PHOSPHORIBOSYL-1-PYROPHOSPHATE (PRPP) AND TWO MG2+ IONS

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.05 Å
  • R-Value Free: 0.154 
  • R-Value Work: 0.122 

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This is version 1.3 of the entry. See complete history. 


Literature

Substrate deformation in a hypoxanthine-guanine phosphoribosyltransferase ternary complex: the structural basis for catalysis.

Heroux, A., White, E.L., Ross, L.J., Kuzin, A.P., Borhani, D.W.

(2000) Structure 8: 1309-1318

  • DOI: 10.1016/s0969-2126(00)00546-3
  • Primary Citation of Related Structures:  
    1FSG

  • PubMed Abstract: 

    • Hypoxanthine-guanine phosphoribosyltransferases (HGPRTs) are well-recognized antiparasitic drug targets. HGPRT is also a paradigmatic representative of the phosphoribosyltransferase family of enzymes, which includes other important biosynthetic and salvage enzymes and drug targets ...

    Hypoxanthine-guanine phosphoribosyltransferases (HGPRTs) are well-recognized antiparasitic drug targets. HGPRT is also a paradigmatic representative of the phosphoribosyltransferase family of enzymes, which includes other important biosynthetic and salvage enzymes and drug targets. To better understand the reaction mechanism of this enzyme, we have crystallized HGPRT from the apicomplexan protozoan Toxoplasma gondii as a ternary complex with a substrate and a substrate analog.

    Related Citations: 
    • Crystal Structures of the Toxoplasma Gondii Hypoxanthine-Guanine Phosphoribosyltransferase-GMP and -IMP Complexes:Comparison of purine binding Interactions with the XMP Complex
      Heroux, A., White, E.L., Ross, L.J., Davis, R.L., Borhani, D.W.
      (1999) Biochemistry 38: 14485
    • Crystal Structure of Toxoplasma Gondii Hypoxanthine-Guanine Phosphoribosyltransferase with XMP, Pyrophosphate, and Two Mg(2+) Ions Bound:Insights into the Catalytic Mechanism
      Heroux, A., White, E.L., Ross, L.J., Borhani, D.W.
      (1999) Biochemistry 38: 14495
    • Isolation and Sequencing of a Cdna Encoding the Hypoxanthine-Guanine Phosphoribosyltransferase from Toxoplasma Gondii
      Vasanthakumar, G., van Ginkel, S., Parish, G.
      (1994) Gene 147: 153
    Organizational Affiliation: 

    Drug Discovery Division, Southern Research Institute, Birmingham, Alabama 35205, USA.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASEA,
B [auth C]		233Toxoplasma gondii RHMutation(s): 0 
EC: 2.4.2.8 (PDB Primary Data), 2.4.2.22 (UniProt)
UniProt
Find proteins for Q26997 (Toxoplasma gondii)
Explore Q26997 
Go to UniProtKB:  Q26997
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ26997
Protein Feature View
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  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
9DG PDBBind:  1FSG IC50: 9500 (nM) from 1 assay(s)
Binding MOAD:  1FSG IC50: 9500 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.05 Å
  • R-Value Free: 0.154 
  • R-Value Work: 0.122 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.33α = 90
b = 90.18β = 90
c = 75.72γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing
SHELXL-97refinement
CCP4data scaling

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-12-06
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Source and taxonomy, Version format compliance
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary