1SEJ

Crystal Structure of Dihydrofolate Reductase-Thymidylate Synthase from Cryptosporidium hominis Bound to 1843U89/NADPH/dUMP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.87 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Two crystal structures of dihydrofolate reductase-thymidylate synthase from Cryptosporidium hominis reveal protein-ligand interactions including a structural basis for observed antifolate resistance.

Anderson, A.C.

(2005) Acta Crystallogr.,Sect.F 61: 258-262

  • DOI: 10.1107/S1744309105002435

  • PubMed Abstract: 
  • Cryptosporidium hominis is a protozoan parasite that causes acute gastrointestinal illness. There are no effective therapies for cryptosporidiosis, highlighting the need for new drug-lead discovery. An analysis of the protein-ligand interactions in t ...

    Cryptosporidium hominis is a protozoan parasite that causes acute gastrointestinal illness. There are no effective therapies for cryptosporidiosis, highlighting the need for new drug-lead discovery. An analysis of the protein-ligand interactions in two crystal structures of dihydrofolate reductase-thymidylate synthase (DHFR-TS) from C. hominis, determined at 2.8 and 2.87 A resolution, reveals that the interactions of residues Ile29, Thr58 and Cys113 in the active site of C. hominis DHFR provide a possible structural basis for the observed antifolate resistance. A comparison with the structure of human DHFR reveals active-site differences that may be exploited for the design of species-selective inhibitors.


    Organizational Affiliation

    Department of Chemistry, Dartmouth College, Hanover, NH 03755, USA. aca@dartmouth.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
bifunctional dihydrofolate reductase-thymidylate synthase
A, B, C, D, E
521Cryptosporidium parvumMutation(s): 0 
Gene Names: DHFR-TS
Find proteins for Q27552 (Cryptosporidium parvum)
Go to UniProtKB:  Q27552
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
UMP
Query on UMP

Download SDF File 
Download CCD File 
A, B, C, D, E
2'-DEOXYURIDINE 5'-MONOPHOSPHATE
DUMP
C9 H13 N2 O8 P
JSRLJPSBLDHEIO-SHYZEUOFSA-N
 Ligand Interaction
F89
Query on F89

Download SDF File 
Download CCD File 
A, B, C, D, E
S)-2-(5(((1,2-DIHYDRO-3-METHYL-1-OXOBENZO(F)QUINAZOLIN-9-YL)METHYL)AMINO)1-OXO-2-ISOINDOLINYL)GLUTARIC ACID
FOLATE ANALOG 1843U89
C27 H24 N4 O6
BRVFNEZMTRVUGW-QFIPXVFZSA-N
 Ligand Interaction
NDP
Query on NDP

Download SDF File 
Download CCD File 
A, B, C, D, E
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.87 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.220 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 214.900α = 90.00
b = 116.300β = 95.23
c = 219.700γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
CNSphasing
SCALEPACKdata scaling
MAR345data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2004-02-17 
  • Released Date: 2004-05-18 
  • Deposition Author(s): Anderson, A.C.

Revision History 

  • Version 1.0: 2004-05-18
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description