3FFS

The Crystal Structure of Cryptosporidium parvum Inosine-5'-Monophosphate Dehydrogenase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.19 Å
  • R-Value Free: 0.328 
  • R-Value Work: 0.269 
  • R-Value Observed: 0.272 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The structural basis of Cryptosporidium -specific IMP dehydrogenase inhibitor selectivity

Macpherson, I.S.Kirubakaran, S.Gorla, S.K.Riera, T.V.D'Aquino, J.A.Zhang, M.Cuny, G.D.Hedstrom, L.

(2010) J Am Chem Soc 132: 1230-1231

  • DOI: https://doi.org/10.1021/ja909947a
  • Primary Citation of Related Structures:  
    3FFS, 3KHJ

  • PubMed Abstract: 

    Cryptosporidium parvum is a potential biowarfare agent, an important AIDS pathogen, and a major cause of diarrhea and malnutrition. No vaccines or effective drug treatment exist to combat Cryptosporidium infection. This parasite relies on inosine 5'-monophosphate dehydrogenase (IMPDH) to obtain guanine nucleotides, and inhibition of this enzyme blocks parasite proliferation. Here, we report the first crystal structures of CpIMPDH. These structures reveal the structural basis of inhibitor selectivity and suggest a strategy for further optimization. Using this information, we have synthesized low-nanomolar inhibitors that display 10(3) selectivity for the parasite enzyme over human IMPDH2.


  • Organizational Affiliation

    Departments of Biology, Brandeis University, MS009, 415 South Street, Waltham, Massachusetts 02454, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Inosine-5-monophosphate dehydrogenase
A, B, C, D
400Cryptosporidium parvumMutation(s): 0 
Gene Names: IMPDH56k.02
EC: 1.1.1.205
UniProt
Find proteins for Q8T6T2 (Cryptosporidium parvum)
Explore Q8T6T2 
Go to UniProtKB:  Q8T6T2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8T6T2
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.19 Å
  • R-Value Free: 0.328 
  • R-Value Work: 0.269 
  • R-Value Observed: 0.272 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 119.068α = 90
b = 153.319β = 90
c = 98.228γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
DMphasing
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-12-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description
  • Version 1.3: 2023-09-06
    Changes: Data collection, Database references, Refinement description