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 

wwPDB Validation 3D Report Full Report


This is version 1.2 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 Fold.Des. 8: 1309-1318


  • 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 s ...

    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
    • 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
    • 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


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE
A, C
233Toxoplasma gondiiMutation(s): 0 
Gene Names: HPRT
EC: 2.4.2.22, 2.4.2.8
Find proteins for Q26997 (Toxoplasma gondii)
Go to UniProtKB:  Q26997
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PRP
Query on PRP

Download SDF File 
Download CCD File 
A, C
ALPHA-PHOSPHORIBOSYLPYROPHOSPHORIC ACID
C5 H13 O14 P3
PQGCEDQWHSBAJP-TXICZTDVSA-N
 Ligand Interaction
9DG
Query on 9DG

Download SDF File 
Download CCD File 
A, C
9-DEAZAGUANINE
C6 H6 N4 O
FFYPRJYSJODFFD-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, C
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
9DGIC50: 9500 nM BINDINGMOAD
9DGIC50: 9500 nM PDBBIND
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 = 69.330α = 90.00
b = 90.180β = 90.00
c = 75.720γ = 90.00
Software Package:
Software NamePurpose
SHELXL-97refinement
AMoREphasing
CCP4data scaling
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-12-06
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Source and taxonomy, Version format compliance